Lower cutter mechanism of splitting machine

Abstract

The utility model discloses a lower cutter mechanism of a splitting machine, belongs to the technical field of splitting machines, and aims to solve the problem. According to the technical scheme, the bottom knife roll is characterized by comprising a bottom knife roll, a lower cutter and a knife sleeve, the periphery of the bottom knife roll is sleeved with the lower cutter and the knife sleeve, the lower cutter and the knife sleeve are both arranged to be split assemblies, each split assembly comprises a split part, and a notch groove is formed in the split part; an opening is formed in the split part, and the embedded part penetrates through the opening and is inserted into the notch; the clamping part is detachably connected with the embedding part; when the two split parts are arranged on the dead knife roller in a sleeving mode, the split assembly can be fixed to the dead knife roller by connecting the embedded parts with the clamping parts. Due to the split structural design, the lower cutter and the cutter sleeve can be quickly detached, the downtime is remarkably shortened, the utilization rate of equipment is improved, an operator can complete replacement without complex tools, dependence on professional techniques is reduced, and the whole device is more convenient to maintain and replace.

Description

Technical Field

[0001] This utility model relates to the field of slitting machine technology, and more specifically, to a lower cutting mechanism of a slitting machine. Background Technology

[0002] A slitting machine is a device used to cut and rewind film. The slitting mechanism of a slitting machine includes an upper cutting blade assembly and a lower cutting blade assembly. The lower cutting blade assembly includes a bottom cutting roller and a blade sleeve and lower cutting blade coaxially connected to the bottom cutting roller. A nut is threadedly connected to the bottom cutting roller to lock the blade sleeve and lower cutting blade. However, due to the limited lifespan of the lower cutting blade, when it needs to be replaced, the bottom cutting roller must first be removed from the frame, then the blade sleeve from the bottom cutting roller, and finally the lower cutting blade. The entire replacement process is cumbersome, requires disassembling numerous components, is labor-intensive, time-consuming, and incurs high labor costs, severely impacting the production efficiency of the slitting machine.

[0003] Chinese Patent Application No. CN202420958708.7 discloses a technical solution for “a lower cutting mechanism and a slitting machine. The lower cutting mechanism includes a bottom cutting roller and a lower cutting blade. The lower cutting blade is sleeved on the bottom cutting roller and includes at least two sub-cutting blades. The at least two sub-cutting blades are arranged sequentially along the outer periphery of the bottom cutting roller, and each sub-cutting blade is detachably adsorbed and fixed to the bottom cutting roller by a first magnetic element”.

[0004] When the lower cutter needs to be disassembled, the above solution only requires demagnetizing the first magnetic component using a demagnetizing component, and then disassembling each sub-cutter from the first magnetic component to complete the disassembly of the lower cutter, thus solving the problem of cumbersome and time-consuming operation in the existing technology for replacing the lower cutter.

[0005] This application provides another technical solution to this technical problem. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a lower cutting mechanism for a slitting machine to solve the above-mentioned problems.

[0007] This utility model achieves the above-mentioned objective through the following technical solution: a lower cutting blade mechanism for a slitting machine, comprising a bottom blade roller, a lower cutting blade, and a blade sleeve, wherein both the lower cutting blade and the blade sleeve are sleeved on the outer periphery of the bottom blade roller, and both the lower cutting blade and the blade sleeve are configured as separate components, wherein a cutting groove is formed on the outer peripheral wall of the separate component of the lower cutting blade, and the separate component includes:

[0008] The split section is designed as a semi-circular arc structure. There are two split sections, which are symmetrically arranged on the outer periphery of the bottom cutter roller. The cutting groove is opened on the split section.

[0009] An insert is fixedly disposed at one end of a split part, and a notch is provided at the other end of the split part. An opening is provided on the split part for the insert to pass through and be inserted into the notch.

[0010] A snap-fit ​​part is fixedly disposed on the split part, and one end is connected to the notch. The snap-fit ​​part and the insert part are detachably connected.

[0011] When the two separate parts are fitted onto the bottom cutter roller, the separate assembly can be fixed onto the bottom cutter roller by connecting the embedding part and the snap-fit ​​part.

[0012] The present invention is further configured such that the snap-fit ​​portion includes:

[0013] The outer casing is fixedly connected to the split section;

[0014] A slider for detachably connecting to the embedded part, the slider being slidably disposed on the housing, and one end being slidable into the notch;

[0015] Spring one is used to push the slider against the embedded part, and the spring one is located between the slider and the housing.

[0016] The present invention is further configured such that the snap-fit ​​portion also includes:

[0017] A positioning element is used to fix the sliding position of the sliding element, and the positioning element is slidably disposed within the housing;

[0018] Spring 2 is used to push the positioning member to abut against the sliding member. Spring 2 is located between the positioning member and the housing and is abutting against each other.

[0019] The present invention is further configured such that: a positioning groove is provided on the sliding member, so that when the sliding member is away from the embedded part, the position of the positioning groove coincides with the position of the positioning member, and the positioning member can be embedded in the positioning groove;

[0020] The positioning member has an unlocking groove, the split assembly is equipped with an unlocking component, and the housing has an insertion port that communicates with the interior, so that when the unlocking component is inserted into the housing through the insertion port, the unlocking component abuts against the inner wall of the unlocking groove and pushes the positioning member out of the positioning groove.

[0021] The present invention is further configured such that the sidewalls of the unlocking component and the unlocking groove that abut against each other are inclined, and the inner wall of the unlocking groove that abuts against the unlocking component is formed with a triangular protrusion, wherein two symmetrically arranged sidewalls of the triangular protrusion are used for abutting and guiding the unlocking component in different directions.

[0022] The present invention is further configured such that: two embedded parts are symmetrically arranged on each of the split parts, and two sliding parts are also provided accordingly; a telescopic rod is fixedly connected between the two sliding parts, and a spring is sleeved on the outside of the telescopic rod.

[0023] The present invention is further configured such that a limiting groove is provided on the embedded part for the sliding part to be fitted and fixed.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] Firstly, the split structure design allows for quick disassembly of the lower cutter and the blade sleeve, significantly reducing downtime and improving equipment utilization. Furthermore, operators can complete the replacement without complicated tools, reducing reliance on professional skills and making the whole system easier to maintain and replace.

[0026] Secondly, the detachable connection between the snap-fit ​​part and the insert part (through spring preload and limiting groove) ensures structural stability and prevents loosening. Furthermore, the inclined surface design and sliding guide structure improve connection efficiency, enhance equipment stability, and improve connection reliability.

[0027] Thirdly, the high-strength alloy steel material, combined with quenching treatment, improves wear resistance and corrosion resistance, extends service life, and the semi-circular arc structure of the split part perfectly fits the bottom cutter roller, reducing gaps and improving cutting accuracy.

[0028] Fourth, the old lower cutter can be disassembled and reassembled, and reused after inspection and repair, reducing material costs. The split design has a higher material utilization rate and reduces manufacturing waste. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the lower cutter structure;

[0031] Figure 3 This is a cross-sectional view of the lower cutting blade.

[0032] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0033] Figure 5 Schematic diagram of the split-part structure Figure 1 ;

[0034] Figure 6 Schematic diagram of the split-part structure Figure 2 ;

[0035] Figure 7 A schematic diagram of the connection structure of the sliding component, telescopic rod, and spring 2;

[0036] Figure 8 This is a schematic diagram of the unlocking mechanism.

[0037] Reference numerals: 1. Bottom cutter roller; 2. Lower cutter; 3. Cutter sleeve; 4. Separate part; 5. Embedded part; 6. Notch; 7. Snap-fit ​​part; 8. Housing; 9. Sliding part; 10. Spring 1; 11. Positioning part; 12. Spring 2; 13. Positioning groove; 14. Unlocking groove; 15. Unlocking part; 16. Embedded opening; 17. Telescopic rod; 18. Limiting groove; 19. Triangular protrusion. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the present utility model and simplifying the description. They 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 the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. Example

[0039] A lower cutting mechanism of a slitting machine, such as Figures 1-8 As shown, the device includes a bottom cutter roller 1, a lower cutter 2, and a cutter sleeve 3. A locking nut (not shown) is threadedly connected to the bottom cutter roller 1. The locking nut is fixed to the axial end face of the bottom cutter roller 1 by the threaded connection. The lower cutter 2 and the cutter sleeve 3 are pressed against the outer circumference of the bottom cutter roller 1 by the thread preload. This connection method is prior art and has been described in detail in the prior art application document with application number "CN202420958708.7", so it will not be described in detail here.

[0040] like Figure 1 As shown, the lower cutter 2 and the cutter sleeve 3 are both sleeved on the outer periphery of the bottom cutter roller 1. The lower cutter 2 and the cutter sleeve 3 are both set as separate components. The outer peripheral wall of the separate component of the lower cutter 2 is provided with a cutting groove, which cooperates with the upper cutter through the cutting groove.

[0041] like Figure 1 , Figure 5 and Figure 6As shown, the split assembly includes a split part 4, an insert part 5, and a snap-fit ​​part 7. All three parts are made of high-strength alloy steel and have undergone surface hardening treatment to improve wear resistance. Two split parts 4 are provided, each with a semi-circular arc structure to completely fit the outer circumference of the bottom cutter roller 1. A cutting groove is formed on the split part 4. The insert part 5 and the snap-fit ​​part 7 are fixedly disposed at opposite ends of the split part 4. The split part 4 has a notch 6 at the end where the snap-fit ​​part 7 is located, and an opening communicating with the notch 6 is also provided on the split part 4. When installing and fixing the two split parts 4, the insert part 5 and the snap-fit ​​part 7 on the two split parts 4 need to be connected. The insert part 5 passes through the opening and inserts into the notch 6, connecting with the snap-fit ​​part 7. The snap-fit ​​part 7 is detachably connected to the insert part 5, thus achieving the installation and fixing of the two split parts 4.

[0042] like Figures 2-4 As shown, the snap-fit ​​part 7 includes a housing 8 fixedly connected to the split part 4, a sliding member 9 for detachable connection with the insert part 5, and a spring 10 for pushing the sliding member 9 against the insert part 5. The sliding member 9 is slidably disposed on the housing 8, and one end can slide into the notch 6. The detachable connection with the insert part 5 is achieved by the end that can slide into the notch 6. The spring 10 is located between the sliding member 9 and the housing 8 and abuts against each other. Thus, the elastic support force of the spring 10 ensures that the sliding member 9 always has one end sliding into the notch 6 when no external force is applied, thereby ensuring the connection between the sliding member 9 and the insert part 5 during installation.

[0043] The housing 8 is designed as a split structure, which facilitates the assembly of components into the housing 8 during the production and installation process. The sliding part 9 has a waist-shaped groove on the side wall near the housing 8. A limiting pin embedded in the waist-shaped groove is fixedly connected to the housing 8. Through the cooperation of the limiting pin and the waist-shaped groove, the sliding direction and distance of the sliding part 9 are restricted, thus preventing the sliding part 9 from falling off.

[0044] Among them, such as Figure 4 As shown, the slider 9 has an inclined surface on the side near the opening, and the side wall of the insert 5 that is used to fit with the inclined surface of the slider 9 is also inclined. This makes it easier for the insert 5 to form a component force that pushes the slider 9 back when it comes into contact with the slider 9, thereby facilitating the strong connection between the two.

[0045] At the same time, such as Figure 6 As shown, the embedding part 5 is provided with a limiting groove 18 for the sliding member 9 to be fitted and fixed. After the inclined side wall of the embedding part 5 is separated from the sliding member 9, the position of the sliding member 9 coincides with the limiting groove 18. Thus, the spring 10 pushes the sliding member 9 into the limiting groove 18, thereby realizing the tight connection between the embedding part 5 and the sliding member 9.

[0046] And as Figure 4 As shown, the slider 9 is also provided with a pressing surface on the side near the embedded part 5. The pressing surface is connected to the inclined surface, so that when the slider 9 needs to be retracted, the connection between the slider 9 and the embedded part 5 can be released by pushing the pressing surface.

[0047] like Figure 4 As shown, the snap-fit ​​part 7 also includes a positioning member 11 for fixing the sliding position of the slider 9 and a second spring 12 for pushing the positioning member 11 to abut against the slider 9. The positioning member 11 is slidably disposed in the housing 8, while the second spring 12 is located between the positioning member 11 and the housing 8 and abuts against each other. Thus, after pushing the slider 9 back, the external force on the slider 9 is removed, and the positioning member 11 controls the slider 9 to be fixed in position after backing up, ensuring that the connection between the slider 9 and the embedded part 5 is released.

[0048] And as Figure 7 As shown, a positioning groove 13 is provided on the slider 9 so that when the slider 9 is away from the embedded part 5, the position of the positioning groove 13 coincides with the position of the positioning member 11, and the positioning member 11 can be embedded in the positioning groove 13, thereby enhancing the connection between the positioning member 11 and the slider 9. At the same time, the positioning groove 13 can also serve as a warning to the staff whether the slider 9 has returned to the correct position.

[0049] like Figure 4 and Figure 8 As shown, the positioning member 11 has an unlocking groove 14, the split assembly is equipped with an unlocking member 15, and the housing 8 has an insertion port 16 that communicates with the interior. When the unlocking member 15 is inserted into the housing 8 through the insertion port 16, the unlocking member 15 abuts against the inner wall of the unlocking groove 14 and pushes the positioning member 11 out of the positioning groove 13, thereby releasing the position fixation of the sliding member 9 and resetting the position of the sliding member 9.

[0050] like Figure 4 and Figure 8 As shown, the sidewalls of the unlocking component 15 and the unlocking groove 14 that abut against each other are both inclined. The inclined sidewalls form a component force that pushes the positioning component 11 upward, which facilitates the positioning component 11 to be pushed out of the positioning groove 13. At the same time, the sidewalls of the unlocking component 15 and the unlocking groove 14 that abut against each other are both inclined, and a triangular protrusion 19 is formed at the position where the unlocking groove 14 abuts against the inner wall of the unlocking component 15. Two symmetrically arranged sidewalls of the triangular protrusion 19 are used to abut and guide the unlocking component 15 in different directions, so that the staff can insert the unlocking component 15 from different sides as needed.

[0051] like Figure 5 and Figure 6As shown, two embedded parts 5 are symmetrically arranged on each split part 4, and two sliding parts 9 are also provided accordingly, thereby enhancing the connection between the two. A telescopic rod 17 is fixedly connected between the two sliding parts 9. The telescopic rod 17 guides and stabilizes the sliding of the sliding parts 9, making the overall transmission smoother and more stable. The spring 10 is sleeved on the outside of the telescopic rod 17. The telescopic rod 17 prevents the spring 10 from undergoing radial deformation and protects the spring 10.

[0052] Among them, such as Figure 4 and Figure 7 As shown, the telescopic rod 17 adopts a tubular sleeve structure, which is existing technology and will not be described here.

[0053] Working principle: When the lower cutter 2 needs to be replaced, first loosen the locking nut, and then the operator pushes the sliding member 9 inward to separate the sliding member 9 from the embedded part 5. As the pushing distance increases, the position of the positioning groove 13 will coincide with the position of the positioning member 11. Thus, the spring 12 pushes the positioning member 11 into the positioning groove 13, thereby maintaining the separation of the sliding member 9 from the embedded part 5. Then, the operator repeats the above operation on the sliding member 9 on the other side of the split part 4. However, before repeating the above operation, another operator needs to hold the lower part of the split part 4 to prevent the lower part of the split part 4 from falling off directly after the connection is separated. After disconnecting the sliding members 9 on both sides of the split part 4 from the embedded part 5, the old lower cutter 2 can be removed and replaced with a new lower cutter 2.

[0054] When installing a new lower cutter 2, one of the split parts 4 is attached to the outer periphery of the bottom cutter roller 1, and then the other split part 4 is aligned and attached to it to achieve a fixed installation. During the attachment process, the insert 5 passes through and inserts into the notch 6, so that the insert 5 abuts against the slider 9. The inclined sidewalls of the insert 5 and the slider 9 form a component force that pushes the slider 9 back, so that the insert 5 passes smoothly through the slider 9. The slider 9 changes from abutting against the head of the insert 5 to abutting against the limiting groove 18 of the insert 5. The spring 10 pushes the slider 9 outward, so that the slider 9 is embedded in the limiting groove 18, thus fixing the position of the insert 5 and the slider 9. Then tighten the locking nut to fix the position of the new lower cutter 2.

[0055] Both the lower cutter 2 and the blade sleeve 3 are designed as separate components, so when the blade sleeve 3 needs to be replaced, the same operating steps can be followed.

[0056] Meanwhile, during the process of the aforementioned embedded part 5 pushing the slider 9 back, due to insufficient back distance, the position of the positioning groove 13 has not yet coincided with the position of the positioning part 11, thereby ensuring that the slider 9 slides normally.

[0057] For the old lower cutter 2 that has been replaced, the unlocking component 15 is inserted into the unlocking groove 14 through the insertion port 16. As the unlocking component 15 is inserted further, it can push the positioning component 11 away from the sliding component 9, and finally release the positioning component 11 from fixing the position of the sliding component 9, so that the position of the sliding component 9 is reset. Thus, the old lower cutter 2 can be reassembled and installed. After the staff inspects and repairs it, if the old lower cutter 2 can still be used, it can be reinstalled and used to reduce the cost of use.

[0058] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0059] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lower cutting mechanism for a slitting machine, comprising a bottom cutting roller (1), a lower cutting blade (2), and a blade sleeve (3), wherein the lower cutting blade (2) and the blade sleeve (3) are both sleeved on the outer periphery of the bottom cutting roller (1), characterized in that: Both the lower cutter (2) and the cutter sleeve (3) are configured as separate components, wherein the outer peripheral wall of the separate component of the lower cutter (2) is provided with a cutting groove, and the separate component includes: The split part (4) is configured as a semi-circular arc structure. There are two split parts (4) and they are symmetrically arranged on the outer periphery of the bottom cutter roller (1). The cutting groove is opened on the split part (4). An insert (5) is fixedly disposed at one end of a split part (4). A notch (6) is provided at the other end of the split part (4). An opening is provided on the split part (4) for the insert (5) to pass through and insert into the notch (6). The snap-fit ​​part (7) is fixedly disposed on the split part (4) and one end is connected to the notch (6). The snap-fit ​​part (7) and the insert part (5) are detachably connected. When the two separate parts (4) are fitted onto the bottom cutter roller (1), the separate assembly can be fixed onto the bottom cutter roller (1) by connecting the insert part (5) and the snap-fit ​​part (7).

2. The lower cutting blade mechanism of a slitting machine according to claim 1, characterized in that: The snap-fit ​​portion (7) includes: The housing (8) is fixedly connected to the split part (4); A slider (9) is used to detachably connect with the embedded part (5). The slider (9) is slidably disposed on the housing (8), and one end can slide into the notch (6). Spring 1 (10) is used to push the slider (9) against the embedded part (5). The spring 1 (10) is located between the slider (9) and the housing (8) and is positioned to abut against each other.

3. The lower cutting mechanism of a slitting machine according to claim 2, characterized in that: The snap-fit ​​part (7) also includes: Positioning element (11) is used to fix the sliding position of sliding element (9), and the positioning element (11) is slidably disposed in the housing (8); Spring 2 (12) is used to push the positioning member (11) to abut against the sliding member (9). Spring 2 (12) is located between the positioning member (11) and the housing (8) and abuts against each other.

4. The lower cutting mechanism of a slitting machine according to claim 3, characterized in that: The sliding member (9) is provided with a positioning groove (13) so that when the sliding member (9) is away from the embedded part (5), the position of the positioning groove (13) coincides with the position of the positioning member (11) and the positioning member (11) can be embedded in the positioning groove (13). The positioning member (11) is provided with an unlocking groove (14), the split assembly is equipped with an unlocking member (15), and the housing (8) is provided with an insertion port (16) that communicates with the interior, so that the unlocking member (15) is inserted into the housing (8) through the insertion port (16), the unlocking member (15) abuts against the inner wall of the unlocking groove (14), and pushes the positioning member (11) out of the positioning groove (13).

5. The lower cutting mechanism of a slitting machine according to claim 4, characterized in that: The sidewalls of the unlocking component (15) and the unlocking groove (14) that abut against each other are both inclined. The inner wall of the unlocking groove (14) that abuts against the unlocking component (15) is formed with a triangular protrusion (19). Two symmetrically arranged sidewalls of the triangular protrusion (19) are used to abut and guide the unlocking component (15) in different directions.

6. The lower cutting mechanism of a slitting machine according to claim 5, characterized in that: Two embedded parts (5) are symmetrically arranged on each of the split parts (4), and two sliding parts (9) are also provided accordingly. A telescopic rod (17) is fixedly connected between the two sliding parts (9), and the spring (10) is sleeved on the outside of the telescopic rod (17).

7. The lower cutting mechanism of a slitting machine according to claim 2, characterized in that: A limiting groove (18) is provided on the embedded part (5) for the sliding part (9) to be fitted and fixed.

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