Heat shrink tube cutting device

By designing the receiving groove guide and limiting block structure of the heat shrink tubing cutting device, the problems of uneven cutting end face and fixed-length cutting were solved, achieving efficient and accurate heat shrink tubing cutting.

CN224183220UActive Publication Date: 2026-05-01EAST POINT COMM TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
EAST POINT COMM TECH CO LTD
Filing Date
2025-05-30
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

Existing heat shrink tubing cutting devices suffer from uneven cutting surfaces and difficulty in achieving fixed-length cutting.

Method used

A heat shrink tubing cutting device is designed, comprising a frame, a cutting mechanism, a drive assembly, a clamping assembly, and a cutting assembly. The device provides guidance through a receiving groove, the clamping assembly fixes the heat shrink tubing, and the cutting assembly cuts the heat shrink tubing. Fixed-length cutting is achieved through a limiting block and a slider structure.

Benefits of technology

It improves the accuracy and flatness of cutting, ensures a flat cut end face, and enables fixed-length cutting of heat shrink tubing, protecting the heat shrink tubing from damage.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a heat shrink tube cutting device which comprises a rack and a cutting mechanism, the cutting mechanism is connected into the rack, a containing groove is formed in the rack, and a heat shrink tube can be arranged in the containing groove in a penetrating mode; the cutting mechanism comprises a driving assembly, a pressing assembly and a cutting assembly, the driving assembly is arranged on the rack, the pressing assembly and the cutting assembly are both in transmission connection with the driving assembly and both suitable for being opposite to the heat shrink tube, and the bottom of the cutting assembly is higher than the bottom of the pressing assembly; the driving assembly is used for driving the pressing assembly and the cutting assembly to move close to or away from the heat shrink tube, the pressing assembly is used for pressing the heat shrink tube, and the cutting assembly is used for cutting the heat shrink tube; the cutting assembly is a blade, a groove is formed in the end, close to the bottom of the rack, of the driving assembly, the blade is connected into the groove, and compared with the prior art, the pressing assembly and the cutting assembly can guarantee the cutting effect of the heat shrink tube.
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Description

Technical Field

[0001] This application relates to the field of heat shrink tubing cutting, and in particular to a heat shrink tubing cutting apparatus. Background Technology

[0002] Heat shrink tubing, as an important insulating and protective material, is widely used in power electronics, automotive manufacturing, aerospace and other fields due to its physical property of shrinking when heated. After being heated and shrunk, heat shrink tubing can form a sealed protective layer, which can effectively realize the functions of insulation sealing, mechanical protection and identification management of cable joints. In the processing and application of heat shrink tubing, precise cutting technology is a key preliminary process to ensure its performance. Currently, the cutting of heat shrink tubing results in uneven end faces and requires cutting to a fixed length. Utility Model Content

[0003] To improve the cutting effect of heat shrink tubing, this application proposes a heat shrink tubing cutting device.

[0004] The heat shrink tubing cutting device provided in this application adopts the following technical solution:

[0005] A heat shrink tubing cutting device includes: a frame and a cutting mechanism connected within the frame. The frame has a receiving groove into which the heat shrink tubing can pass. The cutting mechanism includes a driving component, a clamping component, and a cutting component. The driving component is located within the frame. The clamping component and the cutting component are both drively connected to the driving component. Both the clamping component and the cutting component are adapted to face the heat shrink tubing. The driving component drives the clamping component and the cutting component to move closer to or further away from the heat shrink tubing. The clamping component clamps the heat shrink tubing, and the cutting component cuts the heat shrink tubing. The cutting component is a blade. A groove is provided at one end of the driving component near the bottom of the frame, and the cutting component is connected within the groove.

[0006] By adopting the above technical solution, the receiving groove can provide a guiding function for the heat shrink tubing, allowing the heat shrink tubing to pass through the receiving groove and be located below the clamping component and the cutting component, ensuring the accuracy of the cutting. Specifically, the clamping component can ensure that the cutting component can fix the heat shrink tubing during cutting, making the cut end face flatter and improving the cutting effect. Furthermore, the groove can be used to fix the blade, making it easy to replace the blade.

[0007] Preferably, the drive assembly includes a drive cylinder and a connecting block. The drive cylinder is located at the top of the frame, and the connecting block is connected to the output end of the drive cylinder. The clamping assembly and the cutting assembly are both connected to the connecting block.

[0008] By adopting the above technical solution, the connection method of connecting block and driving cylinder facilitates the installation of clamping component and cutting component, and ensures that the clamping component and cutting component can move synchronously. This ensures that the cutting is carried out in the state of the heat shrink tube being clamped by the clamping component, thereby improving the cutting effect.

[0009] Preferably, the drive assembly further includes a support block and a guide rod, the guide rod being connected to the bottom of the frame, the support block being slidably connected to the guide rod, the support block being connected to the output end of the drive cylinder, and the connecting block being connected to the bottom of the support block.

[0010] By adopting the above technical solution, the guide rod can provide guidance for the support block, so that it can move along the length of the guide rod under the drive of the drive cylinder, ultimately ensuring that the cutting assembly can cut the heat shrink tubing in a vertically downward state, further improving the cutting effect.

[0011] Preferably, the clamping assembly includes a pressure block and a connecting rod. One end of the connecting rod is connected to the connecting block, and the pressure block is slidably connected to the other end of the connecting rod. An elastic element is sleeved on the outer peripheral wall of the connecting rod. The elastic element is located between the pressure block and the end of the connecting rod near the connecting block. The bottom of the cutting assembly is higher than the bottom of the clamping assembly.

[0012] By adopting the above technical solution, the heat shrink tubing can be compressed by the pressure block without damaging it. Furthermore, pressing the heat shrink tubing down with the pressure block before cutting improves cutting accuracy and effectiveness.

[0013] Preferably, the elastic element is a spring.

[0014] By adopting the above technical solution and setting the elastic element, it is possible to ensure that the pressure block exerts positive pressure on the heat shrink tubing, thereby ensuring that the heat shrink tubing is compressed, and also to ensure that the pressure block will not damage the heat shrink tubing, thus better protecting the heat shrink tubing.

[0015] Preferably, the frame is provided with a first protrusion and a second protrusion, the first protrusion and the second protrusion extending outward from the frame to both sides of the frame respectively, a gap being provided between the first protrusion and the second protrusion, the pressing assembly and the cutting assembly being opposite to the gap, the first protrusion being provided with the receiving groove, the second protrusion being provided with a limiting block, the limiting block being slidable along the length direction of the second protrusion, and the limiting block being adapted to abut against the heat shrink tubing.

[0016] By adopting the above technical solution, the receiving groove can provide a guiding function for the heat shrink tubing, and the limiting block can better fix the heat shrink tubing. The gap setting avoids interference between the pressure block and the blade and the first or second protrusion, while the first and second protrusions facilitate the placement of the heat shrink tubing.

[0017] Preferably, the second protrusion is provided with a plurality of limiting holes symmetrically arranged on both sides of the second protrusion, and the limiting block is provided with an adjusting rod, which can be inserted into the limiting holes to fix the limiting block.

[0018] By adopting the above technical solution, the position of the heat shrink tubing abutting the limit block can be adjusted by adjusting the position of the limit block, thereby controlling the cutting length of the heat shrink tubing. The cutting length of the heat shrink tubing is determined according to the relative position of the limit block on the second protrusion, thereby achieving fixed-length cutting of the heat shrink tubing.

[0019] Preferably, the second protrusion is provided with a sliding groove, and the bottom of the limiting block is provided with a slider, which is guided and engaged with the sliding groove.

[0020] By adopting the above technical solution, the limiting block can be easily dragged by the slider and the sliding groove, thereby adjusting the position of the limiting block and controlling the length of the heat shrink tubing to be cut. When the slider is set to a T-shape and the sliding groove is set to an inverted T-shape, the limiting block can also be prevented from detaching from the second protrusion.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. The receiving groove can provide a guiding function for the heat shrink tubing, allowing it to pass through the receiving groove and be positioned below the clamping and cutting components, ensuring the accuracy of the cut. Specifically, the clamping component can ensure that the cutting component can fix the heat shrink tubing during cutting, making the cut end face flatter and improving the cutting effect. Furthermore, the groove can fix the blade, making it easy to replace the blade.

[0023] 2. The pressure block can compress the heat shrink tubing without damaging it. Pressing the heat shrink tubing down before cutting improves cutting accuracy and effect. The elastic element ensures that the pressure block exerts positive pressure on the heat shrink tubing, thus ensuring that the heat shrink tubing is compressed but not damaged, better protecting the heat shrink tubing.

[0024] 3. By adjusting the position of the limiting block, the contact position between the heat shrink tubing and the limiting block can be adjusted, thereby controlling the cutting length of the heat shrink tubing. The cutting length of the heat shrink tubing is determined by adjusting the relative position of the limiting block on the second protrusion, thus achieving fixed-length cutting of the heat shrink tubing. The limiting block can be easily dragged by the slider and the sliding groove to adjust its position and control the cutting length of the heat shrink tubing. When the slider is set to a T-shape and the sliding groove is set to an inverted T-shape, it can also prevent the limiting block from disengaging from the second protrusion. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the heat shrink tubing cutting device according to this embodiment;

[0026] Figure 2 This is a cross-sectional view of the heat shrink tubing cutting device according to this embodiment;

[0027] Figure 3 This is a cross-sectional view of the heat shrink tubing cutting device according to another angle in this embodiment;

[0028] Figure 4 This is a cross-sectional view of the heat shrink tubing cutting device according to this embodiment from another angle.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Rack;

[0031] 101, First protrusion; 1011, Receiving groove;

[0032] 102. Second protrusion; 1021. Limiting block; 1022. Limiting hole; 1023. Adjusting rod; 1024. Sliding groove; 10211. Sliding block;

[0033] 103. Gap;

[0034] 200. Cutting mechanism;

[0035] 201. Drive assembly; 2011. Drive cylinder; 2012. Connecting block; 2013. Support block; 2014. Guide rod; 20121. Groove;

[0036] 202. Clamping assembly; 2021. Connecting rod; 2022. Clamping block; 2023. Elastic element;

[0037] 203. Cutting components. Detailed Implementation

[0038] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0039] This application discloses a heat shrink tubing cutting device, which can cut heat shrink tubing.

[0040] Reference Figures 1-3 According to an embodiment of this application, a heat shrink tubing cutting device includes: a frame 100 and a cutting mechanism 200. The cutting mechanism 200 is connected to the frame 100. The frame 100 is provided with a receiving groove 1011, and the heat shrink tubing can be inserted into the receiving groove 1011. The cutting mechanism 200 includes a driving component 201, a clamping component 202, and a cutting component 203. The driving component 201 is disposed in the frame 100. The clamping component 202 and the cutting component 203 are both connected to the driving component 201 in a transmission manner. The clamping component 202 and the cutting component 203 are both adapted to be opposite to the heat shrink tubing, and the bottom of the cutting component 203 is higher than the bottom of the clamping component 202. The driving component 201 is used to drive the clamping component 202 and the cutting component 203 to move closer to or away from the heat shrink tubing. The clamping component 202 is used to clamp the heat shrink tubing, and the cutting component 203 is used to cut the heat shrink tubing.

[0041] Specifically, in this embodiment, the receiving groove 1011 is located below the driving assembly 201, and the driving assembly 201 can drive the clamping assembly 202 and the cutting assembly 203 to move upward or downward simultaneously towards the receiving groove 1011. It should be noted that when the operator uses this heat shrink tubing cutting device to cut heat shrink tubing, the drive switch of the driving assembly 201 cooperates with the foot pedal, allowing the operator to control the movement of the driving assembly 201 via the foot pedal. When the driving assembly 201 moves, it drives the clamping assembly 202 and the cutting assembly... Part 203 moves downward, that is, downward towards the receiving groove 1011. When the drive component 201 is not in operation, the clamping component 202 and the cutting component 203 are both located directly above the receiving groove 1011. In actual operation, the operator inserts the heat shrink tubing into the receiving groove 1011 and drives the drive component 201 through the foot pedal, thereby driving the clamping component 202 and the cutting component 203 downward towards the heat shrink tubing. The clamping component 202 contacts the heat shrink tubing first and clamps it, and then the cutting component 203 cuts the heat shrink tubing.

[0042] The cutting component 203 is a blade, and the drive component 201 has a groove 20121 at one end near the bottom of the frame 100, and the cutting component 203 is connected in the groove 20121.

[0043] Specifically, the cutting component 203 is detachably connected within the groove 20121.

[0044] Furthermore, the receiving groove 1011 can provide a guiding function for the heat shrink tubing, allowing it to pass through the receiving groove 1011 and be positioned below the clamping assembly 202 and the cutting assembly 203, ensuring the accuracy of the cut. Specifically, the clamping assembly 202 can ensure that the cutting assembly 203 can fix the heat shrink tubing during cutting, making the cut end face flatter and improving the cutting effect. Moreover, the groove 20121 can be used to fix the blade, making it easy to replace the blade.

[0045] Reference Figure 3 In some embodiments of this application, the drive assembly 201 includes a drive cylinder 2011 and a connecting block 2012. The drive cylinder 2011 is located at the top of the frame 100, and the connecting block 2012 is connected to the output end of the drive cylinder 2011. The pressing assembly 202 and the cutting assembly 203 are both connected to the connecting block 2012.

[0046] Therefore, the pressing component 202 and the cutting component 203 can be driven to move synchronously by the driving cylinder 2011 and the connecting block 2012. Specifically, they move upward or downward in the direction of the receiving groove 1011. The downward movement cuts the heat shrink tube, while the upward movement facilitates the continued forward movement of the heat shrink tube for the next cut. In this embodiment, the driving part of the driving component 201 is the driving cylinder 2011, but the driving method can also be changed to an electric cylinder or a hydraulic cylinder.

[0047] The connection between the connecting block 2012 and the drive cylinder 2011 facilitates the installation of the clamping component 202 and the cutting component 203, and ensures that the clamping component 202 and the cutting component 203 can move synchronously. This ensures that the cutting is performed with the heat shrink tubing being clamped by the clamping component 202, thus improving the cutting effect.

[0048] Reference Figure 3 In some embodiments of this application, the drive assembly 201 further includes a support block 2013 and a guide rod 2014. The guide rod 2014 is connected to the bottom of the frame 100, the support block 2013 is slidably connected to the guide rod 2014, the support block 2013 is connected to the output end of the drive cylinder 2011, and the connecting block 2012 is connected to the bottom of the support block 2013.

[0049] In this embodiment, the support block 2013 has a square structure and is located between the connecting block 2012 and the output end of the driving cylinder 2011. In this embodiment, there are four guide rods 2014. The driving cylinder 2011 drives the support block 2013 downward, and the support block 2013 moves along the length of the guide rods 2014. At the same time, the support block 2013 drives the connecting block 2012 downward, and the connecting block 2012 drives the pressure block 2022 downward. The pressure block 2022 finally presses the heat shrink tubing and then cuts the heat shrink tubing through the cutting assembly 203.

[0050] The guide rod 2014 can provide guidance for the support block 2013, so that it can move along the length of the guide rod 2014 under the drive of the drive cylinder 2011, ultimately ensuring that the cutting assembly 203 can cut the heat shrink tubing in a vertically downward state, further improving the cutting effect.

[0051] Reference Figure 2 In some embodiments of this application, the clamping assembly 202 includes a clamping block 2022 and a connecting rod 2021. One end of the connecting rod 2021 is connected to the connecting block 2012, and the clamping block 2022 is slidably connected to the other end of the connecting rod 2021.

[0052] In this embodiment, the pressure block 2022 has a square structure, and its bottom or the whole is made of flexible material. The connecting rod 2021 connects the pressure block 2022 and the connecting block 2012 together. When the drive cylinder 2011 is activated, it will drive the connecting block 2012 to move. The connecting block 2012 drives the connecting rod 2021 to move, and the connecting rod 2021 drives the pressure block 2022 to move, thereby forming an overall downward pressing action to press the heat shrink tubing before cutting. Specifically, the bottom of the blade is higher than the pressure block 2022, so that when the drive cylinder 2011 is activated, the pressure block 2022 presses down on the heat shrink tubing before cutting.

[0053] The pressure block 2022 can compress the heat shrink tubing without damaging it. Furthermore, pressing the heat shrink tubing down with the pressure block 2022 before cutting improves cutting accuracy and effectiveness.

[0054] Reference Figure 2 In some embodiments of this application, an elastic element 2023 is sleeved on the outer peripheral wall of the connecting rod 2021. The elastic element 2023 is located between the pressure block 2022 and the end of the connecting rod 2021 near the connecting block 2012. The bottom of the cutting component 203 is higher than the bottom of the pressing component 202. The elastic element 2023 is a spring.

[0055] In some embodiments, the elastic element 2023 is located on the outer peripheral wall of the connecting rod 2021. When the pressure block 2022 moves downward, the pressure block 2022 first contacts the heat shrink tubing, and then the elastic element 2023 allows the pressure block 2022, which is slidably connected to the connecting rod 2021, to move upward relative to the connecting block 2012. In this embodiment, the elastic element 2023 is a spring.

[0056] By setting the elastic element 2023, the positive pressure of the pressure block 2022 on the heat shrink tubing can be guaranteed, thus ensuring that the heat shrink tubing is pressed tightly, while also ensuring that the pressure block 2022 will not damage the heat shrink tubing, thus better protecting the heat shrink tubing.

[0057] Reference Figure 1 , Figure 4 In some embodiments of this application, the frame 100 is provided with a first protrusion 101 and a second protrusion 102. The first protrusion 101 and the second protrusion 102 extend outward from the frame 100 to both sides of the frame 100, respectively. A gap 103 is provided between the first protrusion 101 and the second protrusion 102. The pressing assembly 202 and the cutting assembly 203 are both opposite to the gap 103. The first protrusion 101 is provided with a receiving groove 1011, and the second protrusion 102 is provided with a limiting block 1021. The limiting block 1021 is adapted to abut against the heat shrink tubing.

[0058] Specifically, the heat shrink tubing can be inserted through the receiving groove 1011 on the first protrusion 101 to the underside of the pressure block 2022 and the blade. Specifically, the pressure block 2022 and the blade are located directly above the gap 103, while the heat shrink tubing is inserted through the receiving groove 1011 to the second protrusion 102 and abuts against the limiting block 1021, and then cut. In this embodiment, the first protrusion 101 and the second protrusion 102 are located on a straight line, and this straight line is perpendicular to the projection of the blade on the horizontal plane.

[0059] The receiving groove 1011 can provide guidance for the heat shrink tubing, and the limiting block 1021 can better fix the heat shrink tubing. The gap 103 is set to avoid interference between the pressure block 2022 and the blade and the first protrusion 101 or the second protrusion 102. The first protrusion 101 and the second protrusion 102 facilitate the placement of the heat shrink tubing.

[0060] Reference Figure 4 In some embodiments of this application, the second protrusion 102 is provided with a plurality of limiting holes 1022 symmetrically arranged on both sides of the second protrusion 102, and the limiting block 1021 is provided with an adjusting rod 1023, which can be inserted into the limiting hole 1022 to fix the limiting block 1021.

[0061] The limiting block 1021 can be installed in the limiting holes 1022 arranged in different opposite directions by adjusting the rod 1023, so that the position of the limiting block 1021 can be adjusted and the position of the heat shrink tubing abutting the limiting block 1021 can be changed.

[0062] By adjusting the position of the limiting block 1021, the position where the heat shrink tubing abuts against the limiting block 1021 can be adjusted, thereby controlling the cutting length of the heat shrink tubing. The cutting length of the heat shrink tubing is determined based on the relative position of the limiting block 1021 on the second protrusion 102, thus achieving fixed-length cutting of the heat shrink tubing.

[0063] Reference Figure 1In some embodiments of this application, the second protrusion 102 is provided with a sliding groove 1024, and the bottom of the limiting block 1021 is provided with a slider 10211, which is guided and engaged with the sliding groove 1024.

[0064] When adjusting the position of the limiting block 1021, the slider 10211 and the sliding groove 1024 are guided and engaged. The position of the limiting block 1021 can be adjusted simply by dragging the limiting block 1021. Although the slider 10211 in this embodiment is a vertical block and the sliding groove 1024 is a strip groove, the slider 10211 can also be set as a T-shape, and the sliding groove 1024 can be set as a matching inverted T-shape. The slider 10211 and the sliding groove 1024 are in a matched state.

[0065] The slider 10211 and the sliding groove 1024 can be used to easily drag the limiting block 1021, thereby adjusting the position of the limiting block 1021 and controlling the length of the heat shrink tubing to be cut. When the slider 10211 is set to a T-shape and the sliding groove 1024 is set to an inverted T-shape, it can also prevent the limiting block 1021 from disengaging from the second protrusion 102.

[0066] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A heat shrink tubing cutting device, characterized in that, include: A frame (100) and a cutting mechanism (200) are provided. The cutting mechanism (200) is connected inside the frame (100). The frame (100) is provided with a receiving groove (1011) through which heat shrink tubing can be inserted. The cutting mechanism (200) includes a drive assembly (201), a clamping assembly (202), and a cutting assembly (203). The drive assembly (201) is mounted on the frame (100). The clamping assembly (202) and the cutting assembly (203) are both connected to the drive assembly (201) in a transmission manner. The clamping assembly (202) and the cutting assembly (203) are both adapted to be opposite to the heat shrink tubing. The drive assembly (201) is used to drive the clamping assembly (202) and the cutting assembly (203) to move closer to or away from the heat shrink tubing. The clamping assembly (202) is used to clamp the heat shrink tubing, and the cutting assembly (203) is used to cut the heat shrink tubing. The cutting component (203) is a blade, and the drive component (201) has a groove (20121) at one end near the bottom of the frame (100), and the cutting component (203) is connected in the groove (20121).

2. The heat shrink tubing cutting device according to claim 1, characterized in that, The drive assembly (201) includes a drive cylinder (2011) and a connecting block (2012). The drive cylinder (2011) is located at the top of the frame (100). The connecting block (2012) is connected to the output end of the drive cylinder (2011). The clamping assembly (202) and the cutting assembly (203) are both connected to the connecting block (2012). The bottom of the connecting block (2012) is provided with the groove (20121).

3. The heat shrink tubing cutting device according to claim 2, characterized in that, The drive assembly (201) further includes a support block (2013) and a guide rod (2014). The guide rod (2014) is connected to the bottom of the frame (100). The support block (2013) is slidably connected to the guide rod (2014). The support block (2013) is connected to the output end of the drive cylinder (2011). The connecting block (2012) is connected to the bottom of the support block (2013).

4. The heat shrink tubing cutting device according to claim 2, characterized in that, The clamping assembly (202) includes a clamping block (2022) and a connecting rod (2021). One end of the connecting rod (2021) is connected to the connecting block (2012), and the clamping block (2022) is slidably connected to the other end of the connecting rod (2021). An elastic element (2023) is sleeved on the outer peripheral wall of the connecting rod (2021). The elastic element (2023) is located between the clamping block (2022) and the end of the connecting rod (2021) near the connecting block (2012). The bottom of the cutting assembly (203) is higher than the bottom of the clamping assembly (202).

5. A heat shrink tubing cutting device according to claim 4, characterized in that, The elastic element (2023) is a spring.

6. A heat shrink sleeve cutting device as defined in claim 1, wherein, The frame (100) is provided with a first protrusion (101) and a second protrusion (102). The first protrusion (101) and the second protrusion (102) extend outward from the frame (100) to both sides of the frame (100). A gap (103) is provided between the first protrusion (101) and the second protrusion (102). The pressing assembly (202) and the cutting assembly (203) are both opposite to the gap (103). The first protrusion (101) is provided with the receiving groove (1011). The second protrusion (102) is provided with a limiting block (1021). The limiting block (1021) can slide along the length direction of the second protrusion (102). The limiting block (1021) is adapted to abut against the heat shrink tubing.

7. A heat shrink sleeve cutting device according to claim 6, wherein, The second protrusion (102) is provided with a plurality of limiting holes (1022) symmetrically arranged on both sides of the second protrusion (102). The limiting block (1021) is provided with an adjusting rod (1023). The adjusting rod (1023) can be inserted into the limiting hole (1022) to fix the limiting block (1021).

8. A heat shrink sleeve cutting device according to claim 6, wherein, The second protrusion (102) is provided with a sliding groove (1024), and the bottom of the limiting block (1021) is provided with a slider (10211), which is guided and engaged with the sliding groove (1024).