A punching knife for a rewinder
By adopting a gear-linked adjustment structure and a perforation structure in the rewinder, the problem of damage to the rubber roller caused by frictional slippage is solved, achieving efficient utilization and extended lifespan of the rubber pad.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING ZHENFENG MASCH&CUTTER CO LTD
- Filing Date
- 2025-09-03
- Publication Date
- 2026-07-14
AI Technical Summary
In the punching mechanism of existing rewinding machines, the second main shaft and the rubber roller rotate through friction, which can easily cause slippage, resulting in material pulling and local damage to the rubber roller, thus shortening its service life.
It adopts an adjustable and perforated structure, and uses gears to link two sets of rotating shafts to ensure synchronous rotation. The angle adjustment disperses the position of the rubber pad, thus extending the service life of the rubber pad.
This ensures the quality of the perforation, while also dispersing the effect of the rubber pad, improving its utilization rate, and extending its service life.
Smart Images
Figure CN224489373U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of punching knife technology for rewinding machines, specifically a punching knife for rewinding machines. Background Technology
[0002] A rewinder is a specialized piece of equipment used for paper, mica tape, and film. Its purpose is to rewind paper rolls produced by papermaking machines sequentially. After rewinding, the paper is made into finished paper and shipped out of the factory. Perforation teeth punch segmented and continuous holes in the paper roll.
[0003] In response, Chinese patent application number CN202120778413.8 discloses a perforation mechanism for a rewinding machine, comprising two mounting brackets. Each mounting bracket has a mounting slider on one side facing the other. A threaded rod is rotatably connected to the front of each mounting slider. A first main shaft is positioned between the two mounting sliders. A disc is rotatably mounted inside a through groove. One end of the threaded rod is fixedly connected to the disc. A perforating roller is positioned on the back of the first main shaft. The perforating roller has at least two rows of grooves arranged in a circular array. A pressure block is placed inside the groove, and a perforating knife is slidably connected to the center of the pressure block. This invention utilizes the combination of mounting sliders and perforating rollers. After adjusting the distance between the rubber roller and the perforating roller, a motor drives the second main shaft to rotate, which in turn drives the perforating roller to rotate. This allows multiple rows of small holes to be perforated at equal intervals on the aluminum foil, making the perforation of the aluminum foil more practical and convenient.
[0004] The punching mechanism drives the rubber roller to rotate by rotating the second spindle. However, the second spindle and the rubber roller rotate together by friction, which can easily cause slippage, resulting in the material being pulled. Furthermore, the punching knife is in contact with the fixed position of the rubber roller for a long time, which can easily accelerate the local damage of the rubber roller, shorten the overall life of the rubber roller, and require frequent replacement.
[0005] Therefore, in order to solve the above problems, a punching knife for a rewinding machine is proposed. Utility Model Content
[0006] The purpose of this utility model is to provide a punching knife for a rewinding machine to solve the problem mentioned in the background art that the punching mechanism in the prior art can drive the rubber roller to rotate through the rotation of the second main shaft. However, the second main shaft and the rubber roller rotate together by friction, which is prone to slippage, causing the material to be pulled. In addition, the punching knife is in contact with the fixed position of the rubber roller for a long time, which can easily accelerate the local damage of the rubber roller, shorten the overall life of the rubber roller, and require frequent replacement.
[0007] To achieve the above objectives, the present invention provides the following technical solution: a punching knife for a rewinding machine, comprising: a mounting frame, wherein a groove is provided on the surface of the mounting frame;
[0008] An adjustment structure is installed on the mounting bracket. The adjustment structure includes a movable block, which is movably installed inside the slide groove. A guide block is fixedly connected to the side wall of the movable block, and a connecting block is fixedly connected to the top surface of the movable block. A hand-cranked threaded rod is rotatably connected to the inner side of the connecting block.
[0009] Both the mounting bracket and the movable block are equipped with a drilling structure, which includes a rotating shaft. Two sets of rotating shafts are movably mounted on the surfaces of the mounting bracket and the movable block via bearings. A punch is fixedly connected to the surface of the rotating shaft. A sleeve plate is fitted on the outer side of the rotating shaft. A rubber pad is provided on the outer wall of the sleeve plate. Threaded rings are threaded to both ends of the rotating shaft. A gear is fixedly connected to the left end of the rotating shaft. A drive motor is fixedly mounted on the right side wall of the mounting bracket.
[0010] Preferably, the guide block is slidably mounted on the inner wall of the groove, and the upper end of the hand-threaded rod penetrates the top surface of the mounting bracket and is threadedly connected to the mounting bracket.
[0011] Preferably, the two sets of rotating shafts are parallel to each other and arranged vertically.
[0012] Preferably, the outer wall of the rubber pad is flush with the outer wall of the piercing knife, and the piercing knives and rubber pads on the two sets of rotating shafts are in contact with each other.
[0013] Preferably, the angles of the two sets of piercing knives on the two sets of rotating shafts are staggered.
[0014] Preferably, the two sets of gears mesh with each other, and the output end of the drive motor is connected to the right end of the lower set of rotating shafts via a coupling.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting gears, this utility model links two sets of rotating shafts together, which can keep the two sets of rotating shafts rotating at a constant speed, thus ensuring the quality of drilling. Furthermore, by separating the two sets of rotating shafts, the angle of one set of pressing knives can be adjusted to adjust the position of the pressing knives on the rubber pad on the other set of rotating shafts, thereby dispersing the effect on the rubber pad, improving the utilization rate of the rubber pad, and extending the service life of the rubber pad.
[0016] This invention features an adjustment and perforation structure. A sleeve is fitted onto the outside of a rotating shaft, ensuring both ends of the sleeve are flush with the side walls of the perforating blade. The perforating blade limits the installation angle of the sleeve on the rotating shaft. Two sets of threaded rings are then screwed onto both ends of the rotating shaft, further limiting the sleeve's position on both sides, facilitating convenient installation of the rubber pad on the rotating shaft. In use, starting the drive motor rotates one set of rotating shafts on the upper side. This rotating shaft, via a gear on its left end, drives another set of synchronously rotating shafts. The perforating blades on the two sets of rotating shafts are staggered, allowing them to press against the rubber pad on the other set of rotating shafts, alternately perforating the material. Rotating the hand-threaded rod connects it to the mounting bracket via a threaded connection. Next, as the hand-operated threaded rod rotates, it gradually rises on the mounting bracket. The bottom end of the hand-operated threaded rod is rotatably mounted inside the connecting block. Therefore, when the hand-operated threaded rod rises, it drives the moving block to rise within the slide groove via the connecting block, causing the upper set of rotating shafts to rise away from the lower set of rotating shafts. This disengages the two sets of gears on the two sets of rotating shafts. At this point, one set of rotating shafts can be rotated individually, and then the adjustment mechanism can be operated to reset the upper set of rotating shafts downwards, causing the two sets of gears to re-engage. When the two sets of rotating shafts rotate, the punch can contact other positions on the rubber pad on the other mounting bracket, ensuring the drilling effect while dispersing the effect on the rubber pad, improving the utilization rate of the rubber pad, and extending its service life. Attached Figure Description
[0017] Figure 1 This is a front view schematic diagram of the structure of this utility model;
[0018] Figure 2 This is a side view of the structure of this utility model;
[0019] Figure 3 This is an exploded view of the structure of the mounting bracket of this utility model;
[0020] Figure 4 This is an exploded view of the rotating shaft structure of this utility model;
[0021] Figure 5 This is a side view sectional diagram of the two sets of perforated structures of this utility model.
[0022] In the diagram: 1. Mounting bracket; 11. Slide groove; 2. Adjustment structure; 21. Moving block; 22. Guide block; 23. Connecting block; 24. Hand-threaded rod; 3. Drilling structure; 31. Rotating shaft; 32. Punching tool; 33. Sleeve plate; 34. Rubber pad; 35. Threaded ring; 36. Gear; 37. Drive motor. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] Please see Figures 1-5 An embodiment of a punching knife for a rewinding machine provided by this utility model:
[0025] The mounting bracket 1 and drive motor 37 used in this application are products that can be purchased directly from the market. Their principles and connection methods are existing technologies well known to those skilled in the art, so they will not be described in detail here.
[0026] A punching tool for a rewinding machine includes: a mounting frame 1, the surface of which is provided with a groove 11;
[0027] An adjustment structure 2 is installed on the mounting bracket 1. The adjustment structure 2 includes a movable block 21, which is movably installed inside the slide 11. A guide block 22 is fixedly connected to the side wall of the movable block 21, and a connecting block 23 is fixedly connected to the top surface of the movable block 21. A hand-cranked threaded rod 24 is rotatably connected to the inner side of the connecting block 23.
[0028] Both the mounting bracket 1 and the movable block 21 are equipped with a drilling structure 3. The drilling structure 3 includes a rotating shaft 31. Two sets of rotating shafts 31 are movably mounted on the surfaces of the mounting bracket 1 and the movable block 21 respectively via bearings. A pressing knife 32 is fixedly connected to the surface of the rotating shaft 31. A sleeve plate 33 is sleeved on the outer side of the rotating shaft 31. A rubber pad 34 is provided on the outer wall of the sleeve plate 33. Threaded rings 35 are threaded to both ends of the rotating shaft 31. A gear 36 is fixedly connected to the left end of the rotating shaft 31. A drive motor 37 is fixedly installed on the right side wall of the mounting bracket 1. The two sets of gears 36 can link the two sets of rotating shafts 31 together, so that the two sets of rotating shafts 31 can rotate at a constant speed, which can ensure the drilling quality. Furthermore, by separating the two sets of rotating shafts 31, the angle of one set of pressing knives 32 can be adjusted to adjust the position of the pressing knife 32 on the rubber pad 34 on the other set of rotating shafts 31, so as to disperse the effect on the rubber pad 34, improve the utilization rate of the rubber pad 34, and extend the service life of the rubber pad 34.
[0029] Furthermore, the guide block 22 is slidably mounted on the inner wall of the slide groove 11, and the upper end of the hand-turned threaded rod 24 penetrates the top surface of the mounting frame 1 and is threadedly connected to the mounting frame 1. The guide block 22 provides a limit for the stable lifting and lowering of the moving block 21 inside the slide groove 11.
[0030] Furthermore, the two sets of rotating shafts 31 are parallel to each other and arranged vertically. The two sets of rotating shafts 31 cooperate with each other to punch holes in the material.
[0031] Furthermore, the outer wall of the rubber pad 34 is flush with the outer wall of the piercing knife 32, and the piercing knife 32 and the rubber pad 34 on the two sets of rotating shafts 31 are in contact with each other. The piercing knife 32 can work with the rubber pad 34 to stably punch holes in the material.
[0032] Furthermore, the two sets of pressing knives 32 on the two sets of rotating shafts 31 are angled to each other, so that the two sets of pressing knives 32 on the two sets of rotating shafts 31 will not come into contact with each other, thus avoiding accidents.
[0033] Furthermore, the two sets of gears 36 mesh with each other, and the output end of the drive motor 37 is connected to the right end of the lower set of rotating shafts 31 through a coupling. The drive motor 37 provides power for the rotation of the rotating shafts 31, and the two sets of rotating shafts 31 can be linked by the gears 36 to ensure synchronous rotation.
[0034] Working principle: During installation, the sleeve 33 is fitted onto the outside of the rotating shaft 31, so that the two ends of the sleeve 33 are in contact with the two side walls of the pressing knife 32. The pressing knife 32 can limit the installation angle of the sleeve 33 on the rotating shaft 31. Then, the two sets of threaded rings 35 are screwed to the two ends of the rotating shaft 31 respectively. The two sets of threaded rings 35 can limit the sleeve 33 on the rotating shaft 31 on both sides, so as to realize the convenient installation of the rubber pad 34 on the rotating shaft 31.
[0035] When in use, start the drive motor 37, which can drive a set of rotating shafts 31 on the upper side to rotate. The rotating shafts 31 can drive another set of synchronous rotating shafts 31 to rotate through the gear 36 on the left end. The punching knives 32 on the two sets of rotating shafts 31 are staggered. The punching knives 32 can press on the rubber pads 34 of the other set of rotating shafts 31 to alternately punch holes in the material.
[0036] Rotate the hand-threaded rod 24, which is threadedly connected to the mounting bracket 1. As the hand-threaded rod 24 rotates, it gradually rises on the mounting bracket 1. The bottom end of the hand-threaded rod 24 is rotated and installed in the connecting block 23. Therefore, when the hand-threaded rod 24 rises, it drives the moving block 21 to rise in the slide groove 11 through the connecting block 23, so that the upper set of rotating shafts 31 rises away from the lower set of rotating shafts 31. The two sets of gears 36 on the two sets of rotating shafts 31 are disengaged. At this time, rotate one set of rotating shafts 31 alone, and then operate the adjustment structure 2 to reset the upper set of rotating shafts 31 downwards, so that the two sets of gears 36 re-engage. At this time, when the two sets of rotating shafts 31 rotate, the punching knife 32 can contact other positions of the rubber pad 34 on the other set of mounting brackets 1, ensuring the drilling effect while dispersing the effect on the rubber pad 34, improving the utilization rate of the rubber pad 34, and extending the service life of the rubber pad 34.
[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.
Claims
1. A punching tool for a rewinding machine, comprising: Mounting bracket (1), the surface of which is provided with a sliding groove (11); Its features are: An adjustment structure (2) is installed on the mounting bracket (1). The adjustment structure (2) includes a moving block (21). The moving block (21) is movably installed on the inner side of the slide groove (11). A guide block (22) is fixedly connected to the side wall of the moving block (21). A connecting block (23) is fixedly connected to the top surface of the moving block (21). A hand-turned threaded rod (24) is rotatably connected to the inner side of the connecting block (23). Both the mounting bracket (1) and the moving block (21) are equipped with a drilling structure (3). The drilling structure (3) includes a rotating shaft (31). Two sets of rotating shafts (31) are movably mounted on the surfaces of the mounting bracket (1) and the moving block (21) respectively via bearings. A pressing knife (32) is fixedly connected to the surface of the rotating shaft (31). A sleeve plate (33) is sleeved on the outer side of the rotating shaft (31). A rubber pad (34) is provided on the outer wall of the sleeve plate (33). Threaded rings (35) are threaded to both ends of the rotating shaft (31). A gear (36) is fixedly connected to the left end of the rotating shaft (31). A drive motor (37) is fixedly installed on the right side wall of the mounting bracket (1).
2. The punching tool for a rewinding machine according to claim 1, characterized in that: The guide block (22) is slidably mounted on the inner wall of the slide groove (11), and the upper end of the hand-turned threaded rod (24) penetrates the top surface of the mounting bracket (1) and is threadedly connected to the mounting bracket (1).
3. The punching tool for a rewinding machine according to claim 1, characterized in that: The two sets of rotating shafts (31) are parallel to each other and arranged vertically.
4. A punching tool for a rewinding machine according to claim 1, characterized in that: The outer wall of the rubber pad (34) is flush with the outer wall of the piercing knife (32), and the piercing knife (32) and the rubber pad (34) on the two sets of rotating shafts (31) are in contact with each other.
5. A punching tool for a rewinding machine according to claim 1, characterized in that: The two sets of piercing knives (32) on the two sets of rotating shafts (31) are offset from each other at an angle.
6. A punching tool for a rewinding machine according to claim 1, characterized in that: The two sets of gears (36) mesh with each other, and the output end of the drive motor (37) is connected to the right end of the lower set of rotating shafts (31) via a coupling.