Copper pipe cutting machine with protection structure

Abstract

The invention discloses a copper pipe cutting machine with a protection structure, and relates to the technical field of cutting, the copper pipe cutting machine comprises a copper pipe cutting handheld device shell, adjusting supports are mounted on the surfaces of one ends of two limiting supports, and adjusting blocks are mounted on the outer side surfaces of the adjusting supports and the outer side surfaces of two extrusion supports; when the two ends of the cutting position of the refrigerant pipe are fixed through the multiple fixing columns, the fixing columns can ensure that the refrigerant pipe keeps the stable position and posture in the cutting process, cutting errors caused by shaking or moving are avoided, the flatness and smoothness of the cutting face are ensured, and the cutting efficiency is improved. Therefore, the cutting process of the refrigerant pipe is stable, workers are protected from being damaged due to shaking, the defects of burrs, cracks and the like caused by unstable cutting are avoided, and the risk of refrigerant leakage caused by the fact that the cutting surface is possibly uneven can be effectively reduced by fixing the refrigerant pipe, so that the working efficiency is improved, and the working efficiency is improved. And the integrity and the safety of a refrigerant pipeline system are protected.

Description

Technical Field

[0001] The invention relates to the technical field of cutting and trimming, and in particular to a copper tube cutting machine with a protective structure. Background Art

[0002] The handheld copper tube cutting machine is a portable tool designed for cutting copper tubes. The working principle of the handheld copper tube cutting machine mainly depends on the internal cutting blade and transmission mechanism. When the operator presses the start button, the motor starts to run, driving the transmission mechanism to rotate the cutting blade. At this time, the operator puts the copper tube into the cutting port of the cutting machine and applies appropriate pressure. As the cutting blade rotates, the copper tube is gradually cut off.

[0003] When the existing handheld copper tube cutting machine is used to cut the refrigerant tube, it is inconvenient to fix the two ends of the refrigerant tube during cutting and the fixing effect is poor. The two ends of the refrigerant tube are not firmly fixed. The copper tube of the refrigerant tube may slide or deviate during the cutting process, resulting in an uneven cutting surface and irregular cutting effect, which affects the appearance quality of the refrigerant tube and may also affect the subsequent pipeline connection, resulting in loose joints, thereby affecting the sealing of the system. The copper tube of the refrigerant tube is not correctly fixed. The force of the handheld copper tube cutting machine may cause the handheld copper tube cutting machine to deform, especially when the cutting force is too large, causing the copper tube of the handheld copper tube cutting machine to be partially bent or indented, affecting the structural strength and appearance of the refrigerant pipeline.

[0004] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0005] The purpose of the present invention is that when multiple fixing columns fix the two ends of the refrigerant tube at the cutting point, the fixing columns can ensure that the refrigerant tube maintains a stable position and posture during the cutting process, avoiding cutting errors caused by shaking or movement, ensuring the flatness and smoothness of the cutting surface, thereby stabilizing the refrigerant tube cutting process and protecting the staff from damage due to shaking, avoiding defects such as burrs and cracks caused by unstable cutting, and the risk of causing uneven cutting surfaces and further causing refrigerant leakage. By fixing the refrigerant tube, this risk can be effectively reduced, protecting the integrity and safety of the refrigerant pipeline system, thereby improving the cutting quality, ensuring the integrity and safety of the refrigerant pipeline system, effectively preventing local bending or indentation of the refrigerant pipeline, and maintaining the structural strength and appearance of the refrigerant pipeline.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a copper tube cutting machine with a protective structure, comprising a copper tube cutting handheld device shell and a battery pack installed inside the copper tube cutting handheld device shell, the outer surface of the copper tube cutting handheld device shell is provided with a charging interface, the outer surface of the copper tube cutting handheld device shell is provided with a switch button group, the outer surface of the copper tube cutting handheld device shell is provided with a power transmission component, the outer surface of the power transmission component is provided with two limit brackets, one end surface of the two limit brackets are provided with an adjustment bracket, the outer surface of the power transmission component is provided with two synchronous stable clamping components, the synchronous The stable clamping assembly includes two first rotating columns and two extrusion brackets, the two first rotating columns are movably installed inside the copper tube cutting handheld device shell, the two extrusion brackets are correspondingly installed on the outer surface of the first rotating column, the interiors of the two extrusion brackets are provided with limiting grooves, the inner walls of the two limiting grooves are movably installed with second rotating columns, the outer surfaces of the two second rotating columns are fixedly connected to the interior of the adjustment bracket, the outer surfaces of the adjustment bracket and the outer surfaces of the two extrusion brackets are installed with adjustment blocks, the interiors of the three adjustment blocks are installed with limiting adjustment components, and the outer surface of the power transmission component is installed with a cutting protection component.

[0007] Furthermore, the power transmission assembly includes a main motor and a main rotating shaft, the main motor is installed inside the copper tube cutting handheld device shell, the main rotating shaft is installed on the outer surface of the output end of the main motor, the outer surface of the main rotating shaft is installed with a first driving gear, and the outer surface of the copper tube cutting handheld device shell is installed with a snap ring.

[0008] Furthermore, two ball screws are movably installed inside the copper tube cutting handheld device shell, and the outer surfaces of the two ball screws are both installed with driven gears. The outer surfaces of the two driven gears and the outer surface of the first driving gear are jointly movably installed with a chain.

[0009] Furthermore, the outer surfaces of the two ball screws are movably mounted with screw sliders, and the outer surfaces of the two screw sliders are fixedly connected to one end surface of the limiting bracket.

[0010] Furthermore, two limiting cavities are provided inside the copper tube cutting handheld device shell, and the inner walls of the two limiting cavities are in active contact with the outer surface of the screw slider.

[0011] Furthermore, the cutting protection component includes a second driving gear and a limiting sliding cavity, the second driving gear is installed on the outer surface of the main rotating shaft, the limiting sliding cavity is opened inside the copper tube cutting handheld device shell, and two limiting sliding blocks are movably installed on the inner wall of the limiting sliding cavity.

[0012] Furthermore, gear bars are installed on one end surface of the two limit sliders, connecting plates are installed on the outer surfaces of the two limit sliders, and cutting knives are installed on the outer surfaces of the two connecting plates.

[0013] Furthermore, the limit adjustment assembly includes a telescopic cavity and a plurality of connecting springs, the telescopic cavity is opened inside the adjustment block, the plurality of connecting springs are installed on the inner wall of the telescopic cavity, the outer surfaces of the plurality of connecting springs are jointly installed with a limit block, the outer surface of the limit block is installed with a fixing column, and the outer surface of the limit block is in active contact with the inner wall of the telescopic cavity.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The copper tube cutting machine with a protective structure, when fixing the two ends of the refrigerant tube at the cutting point by means of a fixed column, the fixed column can ensure that the refrigerant tube maintains a stable position and posture during the cutting process, avoiding cutting errors caused by shaking or movement, ensuring the flatness and smoothness of the cut surface, thereby stabilizing the cutting process of the refrigerant tube and protecting the staff from damage caused by shaking, avoiding defects such as burrs and cracks caused by unstable cutting, which may cause an uneven cut surface and further cause the risk of refrigerant leakage. By fixing the two ends of the refrigerant tube, this risk can be effectively reduced, protecting the integrity and safety of the refrigerant pipeline system, thereby improving the cutting quality, ensuring the integrity and safety of the refrigerant pipeline system, effectively preventing local bending or indentation of the refrigerant pipeline, and maintaining the structural strength and appearance of the refrigerant pipeline.

[0015] 2. The copper tube cutting machine with a protective structure ensures that the cross section of the refrigerant tube is flat and without tilt during the cutting process by having the cutting surfaces of the two cutting knives on the same horizontal plane, thereby improving the cutting accuracy. Therefore, the cross section of the refrigerant tube after cutting is flat and burr-free, and the two cutting knives can quickly cut the refrigerant tube by working together, ensuring that the two cutting knives always maintain the same speed and direction during the cutting process, thereby improving the cutting accuracy and consistency, helping to reduce errors and improve the accuracy of subsequent processing or installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The overall structural diagram of the present invention is shown; Figure 2 Another schematic diagram of the overall structure of the present invention is shown; Figure 3 The overall structure schematic diagram of the power transmission assembly of the present invention is shown; Figure 4 A schematic diagram of the internal structure of the power transmission assembly of the present invention is shown; Figure 5 A schematic diagram of the internal structure of the power transmission assembly of the present invention from another viewing angle is shown; Figure 6 A schematic diagram of the internal structure of the limit adjustment component of the present invention is shown; Figure 7 A schematic diagram of the external structure of the connecting plate of the present invention is shown; Legend: 1. Copper tube cutting handheld device shell; 2. Switch button group; 3. Battery pack; 4. Charging port; 5. Main motor; 6. Main rotating shaft; 7. First driving gear; 8. Driven gear; 9. Chain; 10. Ball screw; 11. Screw slider; 12. Limiting cavity; 13. Limiting bracket; 14. Adjusting bracket; 15. First rotating column; 16. Extrusion bracket; 17. Fixed column; 18. Limiting groove; 19. Second rotating column; 20. Cutting knife; 21. Limiting block; 22. Gear bar; 23. Limiting sliding cavity; 24. Limiting slider; 25. Connecting plate; 26. Telescopic cavity; 27. Connecting spring; 28. Adjusting block; 29. ​​Buckle ring; 30. Second driving gear. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] like Figure 1-7As shown, a copper tube cutting machine with a protective structure comprises a copper tube cutting handheld device shell 1 and a battery pack 3 installed inside the copper tube cutting handheld device shell 1, a charging interface 4 is provided on the outer surface of the copper tube cutting handheld device shell 1, a switch button group 2 is installed on the outer surface of the copper tube cutting handheld device shell 1, a power transmission component is installed on the outer surface of the copper tube cutting handheld device shell 1, two limit brackets 13 are installed on the outer surface of the power transmission component, and one end surface of the two limit brackets 13 are both installed with an adjustment bracket 14, and the outer surface of the power transmission component is installed with two synchronous and stable clamping components, and the synchronous and stable clamping components include two first rotating columns 15 and two extrusion brackets 16, the two first rotating columns 15 are both movably installed inside the copper tube cutting handheld device shell 1, and the two extrusion brackets 16 are correspondingly installed on the outer surface of the first rotating columns 15, and the interior of the two extrusion brackets 16 are provided with limit grooves 18, and the inner walls of the two limit grooves 18 are both movably installed with second rotating columns 19, and the outer surfaces of the two second rotating columns 19 are both fixed to the inside of the adjustment bracket 14 The outer surfaces of the adjustment bracket 14 and the two extrusion brackets 16 are connected, and adjustment blocks 28 are installed. The interiors of the three adjustment blocks 28 are all installed with limit adjustment components. The outer surface of the power transmission component is installed with a cutting protection component. The two cutting knives 20 cut the refrigerant tube synchronously, and the cutting surfaces of the two cutting knives 20 are on the same horizontal plane, ensuring that the cross section of the refrigerant tube is flat and without tilt during the cutting process, thereby improving the cutting accuracy. Therefore, the cross section of the refrigerant tube after cutting is flat and burr-free, and the two cutting knives 20 can quickly cut the refrigerant tube by division of labor, ensuring that the two cutting knives 20 always maintain the same speed and direction during the cutting process, thereby improving the accuracy and consistency of the cutting, helping to reduce errors and improve the accuracy of subsequent processing or installation. The two cutting knives 20 work synchronously to quickly complete the cutting of the refrigerant tube. The refrigerant tube is fixed by the fixed columns 17 at both ends during the cutting process, reducing the cutting error caused by movement or vibration. This fixing method makes the cutting process more stable and helps to improve the cutting efficiency.

[0019] The power transmission assembly includes a main motor 5 and a main rotating shaft 6. The main motor 5 is installed inside the copper tube cutting handheld device shell 1. The main rotating shaft 6 is installed on the outer surface of the output end of the main motor 5. The outer surface of the main rotating shaft 6 is installed with a first driving gear 7. The outer surface of the copper tube cutting handheld device shell 1 is installed with a snap ring 29. Two ball screws 10 are movably installed inside the copper tube cutting handheld device shell 1. The outer surfaces of the two ball screws 10 are both installed with driven gears 8. The outer surfaces of the two driven gears 8 and the outer surface of the first driving gear 7 are movably installed with a chain The outer surfaces of the two ball screws 10 are both movably mounted with screw sliders 11, and the outer surfaces of the two screw sliders 11 are fixedly connected to one end surface of the limit bracket 13. Two limit cavities 12 are provided inside the copper tube cutting handheld device shell 1, and the inner walls of the two limit cavities 12 are movably contacted with the outer surfaces of the screw sliders 11. The buttons in the switch button group 2 are pressed to control the main motor 5 to work. The battery is used to power the main motor 5, the cutting motor, the angle adjustment motor and the electric telescopic rod. The main motor 5 drives the main rotating shaft 6 to rotate. The rotating shaft 6 drives the first driving gear 7 and the second driving gear 30 to rotate synchronously, and the first driving gear 7 drives the two ball screws 10 to rotate synchronously through the chain 9. The two ball screws 10 rotate synchronously, and the ball screws 10 cooperate with the screw slider 11, so that the screw slider 11 drives the limit bracket 13 to move stably in a straight line in the limit cavity 12, so that the limit bracket 13 pushes the adjustment bracket 14 to move, and the adjustment bracket 14 drives the two second rotating columns 19 to move corresponding to the limit grooves 18 in the extrusion bracket 16, and the second rotating columns 19 The inner wall of the limiting groove 18 is squeezed, so that the two extrusion brackets 16 correspondingly drive the first rotating column 15 to rotate, so that the six fixed columns 17 limit and fix the refrigerant tube, so that the copper tube cutting handheld device shell 1 is stabilized on the outside of the refrigerant tube, and then the fixed columns 17 are tightly fitted on the refrigerant tube, thereby realizing accurate limiting and fixing of the refrigerant tube, enhancing the cutting stability of the copper tube cutting handheld device shell 1, and ensuring the stability of the refrigerant tube cutting process. The stable cutting device can ensure the continuity and consistency of the cutting action, thereby improving the cutting efficiency.

[0020] The cutting protection component includes a second driving gear 30 and a limit sliding cavity 23, the second driving gear 30 is installed on the outer surface of the main rotating shaft 6, the limit sliding cavity 23 is arranged inside the copper tube cutting handheld device shell 1, and two limit sliding blocks 24 are movably installed on the inner wall of the limit sliding cavity 23, one end surface of the two limit sliding blocks 24 are both installed with gear bars 22, the outer surfaces of the two limit sliding blocks 24 are both installed with connecting plates 25, and the outer surfaces of the two connecting plates 25 are both installed with cutting knives 20, and the limit adjustment component includes a telescopic cavity 26 and a plurality of connecting springs 27, the telescopic cavity 26 is arranged inside the adjustment block 28, and the plurality of connecting springs 27 are installed on the inner wall of the telescopic cavity 26, and the outer surfaces of the plurality of connecting springs 27 are jointly installed with the limit block 21, and the outer surface of the limit block 21 A fixed column 17 is installed on the side surface, and the outer surface of the limit block 21 is in active contact with the inner wall of the telescopic cavity 26. The second active gear 30 drives the two gear bars 22 to move toward each other, and the two gear bars 22 drive the two limit sliders 24 to move toward each other in the limit slider cavity 23. The two movable sliders both drive the connecting plate 25 and the cutting knife 20 to move. When the cutting knife 20 moves toward each other, when the six fixed columns 17 limit and fix the refrigerant pipe, the cutting knife 20 moves to the outside of the refrigerant pipe. At this time, the main motor 5 continues to output, and the fixed column 17 synchronously drives the limit block 21 to squeeze a plurality of connecting springs 27, so that the limit block 21 moves in the telescopic cavity 26 inside the adjusting block 28, which is convenient for the two cutting knives 20 to cut the refrigerant pipe.

[0021] The working process of the present invention is as follows: when it is necessary to cut the refrigerant pipe of the air-conditioning outdoor unit, the air-conditioning outdoor unit is installed outdoors, and the buckle is first buckled into the buckle ring 29 on the outside of the copper tube cutting handheld device shell 1 to prevent the staff from having to hold the copper tube cutting handheld device shell 1 in their hands all the time when working outdoors, so that the operation can be more flexible, and the cutting accuracy and efficiency can be improved. Holding the copper tube cutting handheld device shell 1 for a long time to work can easily cause fatigue of the arms and wrists, which reduces the burden on the staff, improves the comfort of work, and reduces safety accidents caused by the device slipping or falling out of the hands.

[0022] When the refrigerant pipe is cut, the fixed column 17 on the outside of the adjustment bracket 14 is facing the refrigerant pipe, and the main motor 5 is controlled to work by pressing the button in the switch button group 2. The battery is used to power the main motor 5, the cutting motor, the angle adjustment motor and the electric telescopic rod. The main motor 5 drives the main rotating shaft 6 to rotate, and the main rotating shaft 6 drives the first driving gear 7 and the second driving gear 30 to rotate synchronously. The first driving gear 7 drives the two ball screws 10 to rotate synchronously through the chain 9. The two ball screws 10 rotate synchronously, and the ball screw 10 cooperates with the screw slider 11 to make the screw slider 11 drive the limit bracket 13 to move stably in a straight line in the limit cavity 12, so that the limit bracket 13 pushes The movable adjustment bracket 14 moves, and the adjustment bracket 14 drives the two second rotating columns 19 to move corresponding to the limiting groove 18 in the extrusion bracket 16, and the second rotating column 19 squeezes the inner wall of the limiting groove 18, so that the two extrusion brackets 16 correspondingly drive the first rotating column 15 to rotate, so that the six fixed columns 17 limit and fix the refrigerant pipe, so that the copper tube cutting handheld device shell 1 is stabilized on the outside of the refrigerant pipe, and then the fixed column 17 is tightly fitted on the refrigerant pipe, thereby realizing the precise limit and fixation of the refrigerant pipe, enhancing the cutting stability of the copper tube cutting handheld device shell 1, ensuring the stability of the refrigerant pipe cutting process, and the stable cutting device can ensure the continuity and consistency of the cutting action, thereby improving the cutting efficiency.

[0023] And the second active gear 30 drives the two gear bars 22 to move toward each other, and the two gear bars 22 drive the two limit sliders 24 to move toward each other in the limit slider cavity 23, and the two movable sliders all drive the connecting plate 25 and the cutting knife 20 to move. When the cutting knife 20 moves toward each other, when the six fixed columns 17 limit and fix the refrigerant pipe, the cutting knife 20 moves to the outside of the refrigerant pipe at this moment. At this time, the main motor 5 continues to output, and the fixed column 17 synchronously drives the limit block 21 to squeeze a plurality of connecting springs 27, so that the limit block 21 moves in the telescopic cavity 26 inside the adjusting block 28, so that the two cutting knives 20 can cut the refrigerant pipe. The connecting spring 27 has elastic deformation, and a plurality of connecting springs 27 drive the limit block 21 and the fixed column 17 to squeeze and fix the refrigerant pipe, and the two cutting knives 20 can cut the refrigerant pipe synchronously. The cutting knife 20 cuts the refrigerant tube, and the cutting surfaces of the two cutting knives 20 are on the same horizontal plane, ensuring that the cross section of the refrigerant tube is flat and without tilt during the cutting process, thereby improving the cutting accuracy. Therefore, the cross section of the refrigerant tube after cutting is flat and free of burrs, and the two cutting knives 20 work together to quickly cut the refrigerant tube, ensuring that the two cutting knives 20 always maintain the same speed and direction during the cutting process, thereby improving the accuracy and consistency of the cutting, helping to reduce errors and improve the accuracy of subsequent processing or installation. The two cutting knives 20 work synchronously to quickly complete the cutting of the refrigerant tube. The refrigerant tube is fixed by the fixing columns 17 at both ends during the cutting process, reducing the cutting error caused by movement or vibration. This fixing method makes the cutting process more stable and helps to improve the cutting efficiency.

[0024] After the cutting of the refrigerant pipe is completed, the cut refrigerant pipe is fixed in the three fixing columns 17, so that the cut refrigerant pipe cannot fall, and the refrigerant pipe is effectively prevented from moving or falling due to aftershocks after cutting, external interference or its own gravity, which may pose a threat to the safety of ground personnel. The fixing columns 17 can effectively avoid this situation from happening, ensuring that the cut refrigerant pipe can stay safely in the designated position, making it convenient to recover the cut refrigerant pipe and place it in a safe position.

[0025] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A copper tube cutting machine with a protective structure, comprising a copper tube cutting handheld device shell (1) and a battery pack (3) installed inside the copper tube cutting handheld device shell (1), a charging interface (4) being provided on the outer surface of the copper tube cutting handheld device shell (1), and a switch button group (2) being installed on the outer surface of the copper tube cutting handheld device shell (1); It is characterized in that The outer surface of the copper tube cutting handheld device shell (1) is provided with a power transmission component, the outer surface of the power transmission component is provided with two limit brackets (13), one end surface of each of the two limit brackets (13) is provided with an adjustment bracket (14), the outer surface of the power transmission component is provided with two synchronous stable clamping components, the synchronous stable clamping components include two first rotating columns (15) and two extrusion brackets (16), the two first rotating columns (15) are movably mounted inside the copper tube cutting handheld device shell (1), and the two extrusion brackets (16) are correspondingly mounted on the outer surface of the power transmission component. The outer surface of the first rotating column (15) and the interior of the two extrusion brackets (16) are both provided with a limiting groove (18), and the inner walls of the two limiting grooves (18) are both movably mounted with a second rotating column (19), and the outer surfaces of the two second rotating columns (19) are both fixedly connected to the interior of the adjustment bracket (14), and the outer surfaces of the adjustment bracket (14) and the outer surfaces of the two extrusion brackets (16) are both mounted with an adjustment block (28), and the interiors of the three adjustment blocks (28) are all mounted with a limiting adjustment component, and the outer surface of the power transmission component is mounted with a cutting protection component.

2. A copper tube cutting machine with a protective structure according to claim 1, characterized in that: The power transmission assembly comprises a main motor (5) and a main rotating shaft (6); the main motor (5) is mounted inside a copper tube cutting handheld device housing (1); the main rotating shaft (6) is mounted on the outer surface of the output end of the main motor (5); a first driving gear (7) is mounted on the outer surface of the main rotating shaft (6); and a buckle ring (29) is mounted on the outer surface of the copper tube cutting handheld device housing (1).

3. The copper tube cutting machine with a protective structure according to claim 2, characterized in that: Two ball screws (10) are movably mounted inside the copper tube cutting handheld device shell (1), and driven gears (8) are mounted on the outer surfaces of the two ball screws (10). Chains (9) are movably mounted on the outer surfaces of the two driven gears (8) and the outer surface of the first driving gear (7).

4. The copper tube cutting machine with a protective structure according to claim 3, characterized in that: The outer surfaces of the two ball screws (10) are both movably mounted with screw sliders (11), and the outer surfaces of the two screw sliders (11) are fixedly connected to one end surface of the limiting bracket (13).

5. The copper tube cutting machine with a protective structure according to claim 4, characterized in that: Two limiting cavities (12) are provided inside the copper tube cutting handheld device shell (1), and the inner walls of the two limiting cavities (12) are in active contact with the outer surface of the screw slider (11).

6. The copper tube cutting machine with a protective structure according to claim 5, characterized in that: The cutting protection assembly comprises a second driving gear (30) and a limiting sliding cavity (23), wherein the second driving gear (30) is mounted on the outer surface of the main rotating shaft (6), the limiting sliding cavity (23) is opened inside the copper tube cutting handheld device shell (1), and two limiting sliding blocks (24) are movably mounted on the inner wall of the limiting sliding cavity (23).

7. The copper tube cutting machine with a protective structure according to claim 6, characterized in that: One end surface of the two limit sliders (24) is mounted with a gear bar (22), the outer side surfaces of the two limit sliders (24) are mounted with a connecting plate (25), and the outer side surfaces of the two connecting plates (25) are mounted with a cutting knife (20).

8. The copper tube cutting machine with a protective structure according to claim 1, characterized in that: The limit adjustment assembly comprises a telescopic cavity (26) and a plurality of connecting springs (27); the telescopic cavity (26) is opened inside the adjustment block (28); the plurality of connecting springs (27) are installed on the inner wall of the telescopic cavity (26); the outer surfaces of the plurality of connecting springs (27) are jointly installed with a limit block (21); the outer surface of the limit block (21) is installed with a fixing column (17); the outer surface of the limit block (21) is in active contact with the inner wall of the telescopic cavity (26).

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