A unwinding mechanism and a slitting machine

Abstract

The utility model relates to cutting processing field discloses a pay off mechanism and cutting machine, wherein, pay off mechanism includes: rack, connecting assembly, including connecting arm, fixed base and movable seat, connecting arm sets up in the rack, fixed base connects in the end one side of connecting arm, movable seat is detachably connected in fixed base, and the fixed space is formed between movable seat and fixed base and surrounds and sets up, and connecting assembly is provided with two along left and right direction, rotating assembly includes drive motor and transmission shaft, drive motor sets up in the rack, and one end of transmission shaft is rotatably connected in a connecting arm, and the end of transmission shaft stretches into fixed space, and drive motor and transmission shaft other end transmission connection, pay off roll, two ends respectively stretch into two fixed spaces, and one end of pay off roll is detachably connected with transmission shaft, the utility model discloses when replacing the roll material, through directly with the mode of dismounting of pay off roll two ends from two connecting assemblies, effectively reduces the downtime waiting time, improves overall working efficiency.

Description

Technical Field

[0001] This utility model relates to the field of cutting and processing, and discloses an unwinding mechanism and a slitting machine. Background Technology

[0002] When using a slitting machine, the roll material needs to be fixed onto the unwinding roller. After the roll material is unwound, it is usually separated from the unwinding roller. However, the process of fixing and removing the roll material from the unwinding roller is cumbersome and time-consuming, requiring the slitting machine to stop and wait, thus reducing its efficiency. Therefore, there is an urgent need for an unwinding mechanism that allows for easy replacement of roll material, thereby improving overall work efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide an unwinding mechanism and a slitting machine to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] According to a first aspect of the present invention, an unwinding mechanism includes: a frame; a connecting assembly including a connecting arm, a fixed seat, and a movable seat, wherein the connecting arm is disposed on the frame, the fixed seat is connected to one end of the connecting arm, the movable seat is detachably connected to the fixed seat, a fixed space is formed between the movable seat and the fixed seat, the fixed space extends to the side of the fixed seat and the movable seat away from the connecting arm, and two connecting assemblies are arranged in a left-right direction, with the two fixed spaces facing each other; a rotating assembly including a drive motor and a transmission shaft, wherein the drive motor is disposed on the frame, one end of the transmission shaft is rotatably connected to one of the connecting arms, the end of the transmission shaft extends into the fixed space, and the drive motor is drively connected to the other end of the transmission shaft; and an unwinding roller with both ends extending into the two fixed spaces respectively, one end of the unwinding roller being detachably connected to the transmission shaft.

[0005] This technical solution has at least the following beneficial effects: The unwinding roller is used to load the roll material to be unwound. When the roll material needs to be replaced, the movable seats of the two connecting components are separated from the fixed seats. At this time, the two fixed spaces are opened, and the unwinding roller can be completely removed. Since the unwinding roller is separated from the two connecting components, the roll material on the unwinding roller can be easily replaced, improving operating efficiency. In this process, another unwinding roller loaded with new roll material can also be directly loaded between the two connecting components. The two ends of the unwinding roller are reloaded into the two fixed spaces, and one end of the unwinding roller is connected to the drive shaft. Then, the two movable seats are reconnected to the two fixed seats to limit the two ends of the unwinding roller. During operation, the drive motor transmits power to the unwinding roller through the drive shaft, driving the unwinding roller to rotate and unwind, improving the accuracy of unwinding the roll material. Thus, when changing the roll material, by directly disassembling and assembling the two ends of the unwinding roller from the two connecting components, downtime is effectively reduced, and overall work efficiency is improved.

[0006] According to some embodiments of the present invention, one side of the movable seat is rotatably connected to the fixed seat, and the other side of the movable seat is connected to the fixed seat by a snap fastener.

[0007] According to some embodiments of this utility model, the fixed base is rotatably connected to a rotating rod, the rotating rod is threadedly connected to a locking sleeve, and the movable base is provided with a snap-fit ​​notch on the side near the rotating rod. When the rotating rod rotates into the snap-fit ​​notch, the end of the locking sleeve presses against one side of the movable base.

[0008] According to some embodiments of the present invention, a transmission groove is provided on the outer side of the end of the transmission shaft that extends into the fixed space, the transmission groove extends radially along the transmission shaft, and one end of the unwinding roller is engaged in the transmission groove.

[0009] According to some embodiments of the present invention, the connecting assembly further includes a rotary driver and a guide roller disposed on the frame, the end of the connecting arm away from the fixed seat is rotatably connected to the frame, the rotary driver is connected to the connecting arm, and the rotary driver can drive the connecting arm to rotate and cause the unwinding roller to rotate closer to or away from the guide roller.

[0010] According to some embodiments of the present invention, the frame is provided with a limiting groove for the insertion of the drive shaft. The limiting groove extends along the rotation path of the connecting arm. The end of the drive shaft is fitted with an outer sleeve, and the outer side of the outer sleeve abuts against the inner sidewall of the limiting groove.

[0011] According to some embodiments of the present invention, the output end of the drive motor is connected to a driving wheel, the end of the transmission shaft is connected to a driven wheel, and a synchronous belt is connected between the driving wheel and the driven wheel.

[0012] According to some embodiments of the present invention, the movable seat and the fixed seat are located in the fixed space and form an annular step. Bearings are respectively sleeved at both ends of the unwinding roller, and the outer rings of the two bearings respectively abut against the two annular steps.

[0013] A slitting machine according to a second aspect of the present invention includes a winding mechanism and at least two unwinding mechanisms as described above. The winding mechanism includes a winding seat and a winding roller rotatable on the winding seat. A frame is provided with a first guide roller, a second guide roller and a third guide roller between the winding roller and the unwinding roller. The first guide roller is disposed on the side of the second guide roller close to the unwinding roller, and the third guide roller is located below the second guide roller.

[0014] This technical solution has at least the following beneficial effects: In this slitting machine, the roll material is loaded onto the unwinding roller of the unwinding mechanism. The unwinding roller feeds the roll material out, and after being guided by the first guide roller, the second guide roller, and the third guide roller, it is then sent to the take-up roller for winding. The guidance of the roll material by the first guide roller, the second guide roller, and the third guide roller facilitates the slitting of the roll material by the slitting blade installed in the slitting machine. Since there are at least two unwinding mechanisms, while one unwinding mechanism is unwinding, the other unwinding mechanism can reload the material, further reducing downtime. Furthermore, when changing the roll material in the unwinding mechanism, the convenience of reloading the roll material is improved by directly disassembling and assembling both ends of the unwinding roller from the two connecting components, thereby improving the overall work efficiency.

[0015] According to some embodiments of the present invention, the frame is provided with a first transition roller, a second transition roller, a first tension roller, a second tension roller and a third tension roller. The first transition roller and the second transition roller are arranged inclined downwards in a direction away from the third guide roller. The first tension roller and the second tension roller are arranged above the second transition roller in a direction away from the second transition roller. The third tension roller is located below the second tension roller.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional view of the unwinding mechanism of this utility model.

[0019] Figure 2 yes Figure 1 A magnified view of part A.

[0020] Figure 3 This is a schematic diagram of the connection structure between the connecting component and the drive shaft of this utility model, with the fixed space in the open state at this time.

[0021] Figure 4 This is a top view of the slitting machine of this utility model.

[0022] Figure 5 yes Figure 3 A schematic diagram of the BB cross-sectional structure.

[0023] In the attached diagram: 100-frame, 110-limiting groove, 210-connecting arm, 220-fixed seat, 221-rotating rod, 222-locking sleeve, 230-movable seat, 231-clamping notch, 232-annular step, 240-rotary driver, 250-guide roller, 310-drive shaft, 311-drive groove, 400-unwinding roller, 510-rewinding seat, 520-rewinding roller, 610-first guide roller, 620-second guide roller, 630-third guide roller, 710-first transition roller, 720-second transition roller, 730-first tension roller, 740-second tension roller, 750-third tension roller. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0026] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0028] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] In the description of this application, the use of terms such as "one embodiment," "some embodiments," "an example," "some instances," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] Reference Figure 1According to a first aspect of the present invention, an unwinding mechanism includes a frame 100, a connecting assembly, a rotating assembly, and an unwinding roller 400. The connecting assembly includes a connecting arm 210, a fixed seat 220, and a movable seat 230. The connecting arm 210 is disposed on the frame 100. The fixed seat 220 is connected to one end of the connecting arm 210. The movable seat 230 is detachably connected to the fixed seat 220. A fixed space is formed between the movable seat 230 and the fixed seat 220, and the fixed space extends to both the fixed seat 220 and the movable seat 230. On the side away from the connecting arm 210, there are two connecting components arranged in the left-right direction, and the two fixed spaces are arranged opposite each other; the rotating component includes a drive motor and a transmission shaft 310. The drive motor is disposed on the frame 100, one end of the transmission shaft 310 is rotatably connected to one of the connecting arms 210, and the end of the transmission shaft 310 extends into the fixed space. The drive motor is connected to the other end of the transmission shaft 310; the unwinding roller 400 extends into the two fixed spaces at both ends, and one end of the unwinding roller 400 is detachably connected to the transmission shaft 310.

[0031] As described above, the unwinding roller 400 is used to load the roll material to be unwound. When the roll material needs to be replaced, the movable seat 230 of the two connecting components is separated from the fixed seat 220. At this time, the two fixed spaces are opened, and the unwinding roller 400 can be completely removed. Since the unwinding roller 400 is separated from the two connecting components, the roll material on the unwinding roller 400 can be easily replaced, improving operating efficiency. During this process, another unwinding roller 400 loaded with new roll material can also be directly loaded between the two connecting components, thus unwinding the two unwinding rollers 400. The two ends of the unwinding roller 400 are reinstalled into the two fixed spaces, and one end of the unwinding roller 400 is connected to the drive shaft 310. Then, the two movable seats 230 are reconnected to the two fixed seats 220 to limit the two ends of the unwinding roller 400. During operation, the drive motor transmits power to the unwinding roller 400 through the drive shaft 310, causing the unwinding roller 400 to rotate and unwind, thereby improving the accuracy of unwinding the roll material. In this way, when changing the roll material, the unwinding roller 400 can be directly disassembled from the two connecting components, which effectively reduces downtime and improves overall work efficiency.

[0032] Both sides of the movable seat 230 can be detachably connected to the fixed seat 220. To facilitate the connection between the movable seat 230 and the fixed seat 220 and improve the efficiency of disassembly and assembly, in this embodiment, one side of the movable seat 230 is rotatably connected to the fixed seat 220, and the other side of the movable seat 230 is connected to the fixed seat 220 by a snap-fit. With one side of the movable seat 230 rotatably connected to the fixed seat 220, and the other side connected to the fixed seat 220 by a snap-fit, the fixed space is in a closed state. When it is necessary to open the fixed space to disassemble or assemble the unwinding roller 400, the snap-fit ​​between the movable seat 230 and the fixed seat 220 is removed, allowing the movable seat 230 to be rotated off the fixed seat 220 to open the fixed space.

[0033] There are several ways to connect the movable base 230 and the fixed base 220 by snap-fit, such as Figure 2 and Figure 3 As shown, in this embodiment, the fixed base 220 is rotatably connected to a rotating rod 221, and the rotating rod 221 is threadedly connected to a locking sleeve 222. The movable base 230 has a locking notch 231 on one side near the rotating rod 221. The rotating rod 221 rotates into the locking notch 231, and the end of the locking sleeve 222 presses against one side of the movable base 230. The end of the locking sleeve 222 presses the movable base 230 against the fixed base 220, thus maintaining a tight connection between the movable base 230 and the fixed base 220. When it is necessary to open the fixed space, the locking sleeve 222 is rotated away from the movable base 230, removing the pressure on the movable base 230. Then, the rotating rod 221 is rotated away from the locking notch 231, allowing the movable base 230 to rotate away from the fixed base 220 and open the fixed space. This allows the movable base 230 and the fixed base 220 to be quickly and tightly connected.

[0034] After the unwinding roller 400 and the drive shaft 310 are connected to each other, the drive shaft 310 needs to transmit rotational power to the unwinding roller 400. There are various ways to detachably connect the two. In this embodiment, a drive groove 311 is provided on the outer side of the end of the drive shaft 310 that extends into the fixed space. The drive groove 311 extends radially along the drive shaft 310. One end of the unwinding roller 400 is engaged in the drive groove 311. In practical applications, the drive groove 311 can extend radially for a certain distance on the drive shaft 310, or the entire drive shaft 310 can be penetrated radially. When the movable seat 230 moves away from the fixed seat 220 and opens the fixed space, the unwinding roller 400 can be directly engaged with the end of the transmission groove 311 from the outside of the transmission shaft 310, so that the unwinding roller 400 and the transmission shaft 310 can be quickly connected to each other. When the movable seat 230 and the fixed seat 220 are connected to close the fixed space, the end of the unwinding roller 400 can be prevented from coming out of the transmission groove 311. When the transmission shaft 310 rotates, it can drive the unwinding roller 400 to rotate synchronously.

[0035] In the above embodiment, the connecting arm 210 can be directly fixed to the frame 100. When the unwinding roller 400 rotates to unwind, the outer diameter of the entire roll material will change. In order to keep the roll material unwinding stably, in this embodiment, the connecting assembly also includes a rotary driver 240 and a guide roller 250 disposed on the frame 100. The end of the connecting arm 210 away from the fixed seat 220 is rotatably connected to the frame 100. The rotary driver is connected to the connecting arm 210. The rotary driver 240 can drive the connecting arm 210 to rotate and make the unwinding roller 400 rotate closer to or away from the guide roller 250. In practical applications, the rotary driver 240 has various structural forms, such as a motor or a rotary cylinder. In this case, the rotary driving force is directly provided to the connecting arm 210 at the position where the connecting arm 210 is rotatably connected to the frame 100. Alternatively, an electric screw or hydraulic cylinder or other driving source can be used. In this case, one end of the rotary driver 240 is rotatably connected to the frame 100, and the other end is rotatably connected to the connecting arm 210. When the roll material is loaded onto the unwinding roller 400, the rotary drive can rotate the connecting arm 210, causing the outer side of the roll material to abut against the guide roller 250. At this time, the guide roller 250 can press and position the outer layer of the roll material, making the roll material more stable during unwinding. As the roll material is gradually released, the rotary drive 240 can drive the connecting arm 210 to rotate, causing the unwinding roller 400 to gradually approach the guide roller 250, better maintaining the pressing effect of the guide roller 250 on the outer side of the roll material. When it is necessary to replace the roll material, the rotary drive 240 drives the connecting arm 210 to rotate, causing the unwinding roller 400 to move away from the guide roller 250, making it easy to remove the entire unwinding roller 400.

[0036] To further improve the smoothness of the rotation of the connecting arm 210, in this embodiment, the frame 100 is provided with a limiting groove 110 into which the drive shaft 310 can be inserted. The limiting groove 110 extends along the rotation path of the connecting arm 210. The end of the drive shaft 310 is fitted with an outer sleeve, the outer side of which abuts against the inner wall of the limiting groove 110. The end of the drive shaft 310 abuts against the inner wall of the limiting groove 110 through the outer sleeve. When the connecting arm 210 rotates, the load borne by the connecting arm 210 is transmitted through the drive shaft 310 to the inner wall of the limiting groove 110 by the outer side of the outer sleeve abutting against the inner wall of the limiting groove 110, thereby transferring the load to the frame 100. This disperses the load borne by the connecting arm 210 at the rotating connection point of the frame 100, improving the stability of the rotating connection structure of the connecting arm 210 and making the rotation of the unwinding roller 400 by the connecting arm 210 smoother.

[0037] There are various ways for the drive motor to drive the transmission shaft 310 to rotate. In order to ensure that the connecting arm 210 can also provide rotational driving force to the transmission shaft 310 while rotating, in this embodiment, the output end of the drive motor is connected to a drive wheel, and the end of the transmission shaft 310 is connected to a driven wheel. A synchronous belt connects the drive wheel and the driven wheel. The power output of the drive motor is sent to the drive wheel and transmitted to the driven wheel through the synchronous belt, thereby driving the transmission shaft 310 to rotate synchronously. In structures where the connecting arm 210 needs to rotate, the drive motor can be coaxially positioned at the position where the connecting arm 210 is rotatably connected to the frame 100. In this way, when the connecting arm 210 rotates, the synchronous belt can also rotate around the drive wheel and maintain the transmission connection to the driven wheel.

[0038] In some embodiments, the movable seat 230 and the fixed seat 220 form an annular step 232 within the fixed space. Bearings are respectively fitted at both ends of the unwinding roller 400, and the outer rings of the two bearings abut against the two annular steps 232. The annular steps 232 allow for quick installation and positioning of the bearings, improving the rotational stability of the unwinding roller 400. In this case, the end of the unwinding roller 400 is connected to the fixed space through the bearings, making the unwinding roller 400 rotate more smoothly.

[0039] A slitting machine according to a second aspect embodiment of the present invention, such as... Figure 4 and Figure 5 As shown, the system includes a winding mechanism and at least two unwinding mechanisms as described above. The winding mechanism includes a winding base 510 and a winding roller 520 rotatable on the winding base 510. A frame 100 is positioned between the winding roller 520 and the unwinding roller 400, and a first guide roller 610, a second guide roller 620, and a third guide roller 630 are disposed thereon. The first guide roller 610 is located on the side of the second guide roller 620 closer to the unwinding roller 400, and the third guide roller 630 is located below the second guide roller 620. In practical applications, a winding motor is mounted on the winding base 510, and the winding motor drives the winding roller 520 to rotate.

[0040] In this slitting machine, the roll material is loaded onto the unwinding roller 400 of the unwinding mechanism. The unwinding roller 400 feeds the roll material out, and after being guided by the first guide roller 610, the second guide roller 620, and the third guide roller 630, it is then guided to the take-up roller 520 for winding. The guidance of the roll material by the first guide roller 610, the second guide roller 620, and the third guide roller 630 facilitates the slitting of the roll material by the slitting blade installed in the slitting machine. Since there are at least two unwinding mechanisms, while one unwinding mechanism is unwinding, the other unwinding mechanism can reload the material, further reducing downtime. Furthermore, when changing the roll material in the unwinding mechanism, the unwinding roller 400 can be directly disassembled from the two connecting components, improving the convenience of reloading the roll material and thus improving overall work efficiency.

[0041] To improve the tension of the rolled material during delivery, in this embodiment, the frame 100 is provided with a first transition roller 710, a second transition roller 720, a first tension roller 730, a second tension roller 740, and a third tension roller 750. The first transition roller 710 and the second transition roller 720 are arranged inclined downwards in a direction away from the third guide roller 630. The first tension roller 730 and the second tension roller 740 are arranged above the second transition roller 720 in a direction away from the second transition roller 720. The third tension roller 750 is located below the second tension roller 740. After the roll material is fed out from the unwinding roller 400, it passes sequentially around the first guide roller 610, the second guide roller 620, and the third guide roller 630, and then passes alternately around the first transition roller 710 and the second transition roller 720 before being led to the first tension roller 730. It is then fed out horizontally at the first tension roller 730 and the second tension roller 740, and then passes downwards around the third tension roller 750 before being led to the take-up roller 520. This can improve the stability of tension during long-term operation.

[0042] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An unwinding mechanism, characterized in that: include: Rack (100); The connecting assembly includes a connecting arm (210), a fixed seat (220), and a movable seat (230). The connecting arm (210) is disposed on the frame (100). The fixed seat (220) is connected to one end of the connecting arm (210). The movable seat (230) is detachably connected to the fixed seat (220). A fixed space is formed between the movable seat (230) and the fixed seat (220). The fixed space extends to the side of the fixed seat (220) and the movable seat (230) away from the connecting arm (210). There are two connecting assemblies arranged in the left-right direction, and the two fixed spaces are arranged facing each other. The rotating assembly includes a drive motor and a transmission shaft (310). The drive motor is mounted on the frame (100). One end of the transmission shaft (310) is rotatably connected to a connecting arm (210). The end of the transmission shaft (310) extends into the fixed space. The drive motor is connected to the other end of the transmission shaft (310). The unwinding roller (400) extends into the two fixed spaces at both ends, and one end of the unwinding roller (400) is detachably connected to the drive shaft (310).

2. The unwinding mechanism according to claim 1, characterized in that: One side of the movable seat (230) is rotatably connected to the fixed seat (220), and the other side of the movable seat (230) is connected to the fixed seat (220) by a snap fastener.

3. The unwinding mechanism according to claim 2, characterized in that: The fixed seat (220) is rotatably connected to a rotating rod (221), and the rotating rod (221) is threadedly connected to a locking sleeve (222). The movable seat (230) has a snap-fit ​​notch (231) on the side near the rotating rod (221). The rotating rod (221) rotates into the snap-fit ​​notch (231), and the end of the locking sleeve (222) presses against one side of the movable seat (230).

4. The unwinding mechanism according to claim 1, characterized in that: A transmission groove (311) is provided on the outer side of the end of the transmission shaft (310) that extends into the fixed space. The transmission groove (311) extends radially along the transmission shaft (310), and one end of the unwinding roller (400) is engaged in the transmission groove (311).

5. The unwinding mechanism according to claim 1, characterized in that: The connecting assembly also includes a rotary driver (240) and a guide roller (250) disposed on the frame (100). The end of the connecting arm (210) away from the fixed seat (220) is rotatably connected to the frame (100). The rotary driver is connected to the connecting arm (210). The rotary driver (240) can drive the connecting arm (210) to rotate and cause the unwinding roller (400) to rotate closer to or away from the guide roller (250).

6. The unwinding mechanism according to claim 5, characterized in that: The frame (100) is provided with a limiting groove (110) into which the drive shaft (310) can be inserted. The limiting groove (110) extends along the rotation path of the connecting arm (210). The end of the drive shaft (310) is fitted with an outer sleeve, and the outer side of the outer sleeve abuts against the inner sidewall of the limiting groove (110).

7. The unwinding mechanism according to claim 1, characterized in that: The output end of the drive motor is connected to a drive wheel, and the end of the transmission shaft (310) is connected to a driven wheel. A synchronous belt connects the drive wheel and the driven wheel.

8. The unwinding mechanism according to claim 1, characterized in that: The movable seat (230) and the fixed seat (220) are located in the fixed space and form an annular step (232). The two ends of the unwinding roller (400) are respectively fitted with bearings, and the outer rings of the two bearings abut against the two annular steps (232).

9. A slitting machine, characterized in that: The device includes a winding mechanism and at least two unwinding mechanisms as described in any one of claims 1 to 8. The winding mechanism includes a winding seat (510) and a winding roller (520) rotatable on the winding seat (510). The frame (100) is provided with a first guide roller (610), a second guide roller (620) and a third guide roller (630) between the winding roller (520) and the unwinding roller (400). The first guide roller (610) is disposed on the side of the second guide roller (620) near the unwinding roller (400), and the third guide roller (630) is located below the second guide roller (620).

10. A slitting machine according to claim 9, characterized in that: The frame (100) is provided with a first transition roller (710), a second transition roller (720), a first tension roller (730), a second tension roller (740) and a third tension roller (750). The first transition roller (710) and the second transition roller (720) are arranged inclined downwards in a direction away from the third guide roller (630). The first tension roller (730) and the second tension roller (740) are arranged above the second transition roller (720) in a direction away from the second transition roller (720). The third tension roller (750) is located below the second tension roller (740).

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