A pipe cutting device

Abstract

The application relates to the technical field of pipe cutting, in particular to a pipe cutting device and a pipe cutting device, which comprises a base assembly provided with a clamping assembly for clamping a pipe to be cut, the clamping assembly has a clamping center, and an axis where the clamping center is located coincides with a central axis of the clamped pipe to be cut; a mounting disc assembly is rotationally connected with the base assembly, a rotation center axis of the mounting disc assembly coincides with the axis where the clamping center is located; a rotating disc is rotationally connected with the mounting disc assembly, and a rotation center of the rotating disc is eccentrically arranged with the rotation center of the mounting disc assembly; an operating handle is arranged on the outside of the rotating disc and connected with the rotating disc, the operating handle is connected with a cutting piece, and a rotation center of the cutting piece is eccentrically arranged with the rotation center of the rotating disc; wherein the mounting disc assembly is provided with a C-shaped opening, and the rotating disc is at least partially located outside the opening; the above technical scheme improves the universality and adaptability of the pipe cutting device.

Description

Technical Field

[0001] This invention relates to the field of pipe cutting technology, and in particular to a pipe cutting device. Background Technology

[0002] In modern industrial production and engineering construction, pipes, as an important basic material, are widely used in industries such as petrochemicals, building materials, machinery manufacturing, and water conservancy and hydropower. To meet the assembly and connection needs of different scenarios, pipes often need to be cut to specific lengths, making pipe cutting machines a key piece of equipment in the pipe processing stage. Traditional pipe cutting operations mostly rely on manual cutting tools, such as hacksaws and abrasive saws, which are not only labor-intensive and inefficient, but also difficult to guarantee cutting accuracy, easily producing burrs, pipe deformation, and other problems, seriously affecting the quality of subsequent processing.

[0003] Patent No. 202420704905.6 discloses an electric pipe cutting machine. By incorporating a first motor, when it operates, a planetary gear fitted at its output end rotates. Since the planetary gear meshes with an internal gear ring, the internal gear ring rotates, thereby driving the connecting ring and circular plate to rotate. This causes the saw blade to rotate around the pipe once, cutting the pipe in one pass and ensuring the perpendicularity of the pipe end. However, this electric pipe cutting machine has a complex structure, including a worm gear, planetary gears, multiple motors, and transmission components, making installation, debugging, and maintenance quite difficult.

[0004] To address this, patent number 202321262819.6 discloses a novel planetary pipe cutter, comprising a main unit base, a cutting device, a graduated pressure plate, a positioning handle, a limiting block, a motor rotation auxiliary handle, a height equalization pad, and two types of blades. This device adjusts the position of the cutting arm via the graduated pressure plate and the positioning handle to achieve rapid and precise positioning of pipes of different diameters. However, the range of pipe diameters that this pipe cutter can process is limited by the mechanical stroke of the graduated pressure plate, which in turn depends on the overall machine design, resulting in a relatively limited range of pipe diameters it can adapt to and insufficient versatility. Summary of the Invention

[0005] In view of the shortcomings or problems existing in the prior art, this disclosure provides a pipe cutting device with good versatility.

[0006] The technical solution adopted by this disclosure to solve the above-mentioned technical problem is: a pipe cutting device, comprising:

[0007] A base assembly is provided with a clamping assembly for clamping the pipe to be cut. The clamping assembly has a clamping center, and the axis of the clamping center coincides with the central axis of the clamped pipe to be cut.

[0008] The mounting plate assembly is rotatably connected to the base assembly, and the rotation center axis of the mounting plate assembly coincides with the axis of the clamping center.

[0009] A turntable is rotatably connected to the mounting plate assembly, and the rotation center of the turntable is eccentrically set with respect to the rotation center of the mounting plate assembly.

[0010] An operating handle is located on the outside of the turntable and connected to the turntable. The operating handle is connected to a cutting component, and the rotation center of the cutting component is eccentrically set with respect to the rotation center of the turntable.

[0011] The mounting plate assembly is provided with a C-shaped notch, and the turntable is at least partially located outside the notch;

[0012] The mounting plate assembly is provided with an arc-shaped groove and an adjustment knob. The adjustment knob has a relaxed state and a locked state. In the relaxed state, the adjustment knob can slide along the arc-shaped groove. When it slides to a predetermined position, it is locked. By sliding the adjustment knob along the arc-shaped groove, the eccentricity between the rotation center of the cutting workpiece and the clamping center can be adjusted.

[0013] In a preferred embodiment, the mounting plate assembly includes a connecting plate and a pressure plate. The connecting plate is rotatably connected to the base assembly. The arc-shaped groove is provided on the pressure plate, and the pressure plate has a scale marking along the length of the arc-shaped groove to indicate the diameter of the pipe to be cut.

[0014] In a preferred embodiment, a groove is formed between the pressure plate and the connecting plate, and an annular protrusion extends continuously along the circumferential direction on the outer peripheral wall of the turntable. The annular protrusion is at least partially located in the groove and can rotate relative to the groove.

[0015] In a preferred embodiment, the sidewall of the chute is provided with a plurality of first roller assemblies, and the first roller assemblies are rotatably connected to the annular protrusion.

[0016] In a preferred embodiment, the arc-shaped groove includes a first groove body and a second groove body, the second groove body is disposed at the bottom of the first groove body, the cross-section of the arc-shaped groove is T-shaped, and the adjustment knob includes a first adjustment member and a second adjustment member. A protrusion is provided at the end of the first adjustment member away from the second adjustment member, and the protrusion is slidably disposed in the first groove body.

[0017] In a preferred embodiment, the second adjusting member includes an integrally formed operating part and a connecting part. The connecting part is threadedly connected to the first adjusting member. The connecting part is provided with an indicator block for pointing to the scale mark. The operating part is provided with an anti-slip structure for easy manual rotation.

[0018] In a preferred embodiment, the base assembly is further provided with a driving assembly, the clamping assembly is connected to the driving assembly, the clamping assembly includes a first clamping block and a second clamping block, and the driving assembly is used to drive the first clamping block and the second clamping block to move.

[0019] In a preferred embodiment, the base assembly includes a support base and a support disk, the clamping assembly is disposed on the support base, the support disk is disposed on one side of the support base, and the connecting disk is rotatably connected to the support disk; the cutting element is located between the support disk and the clamping assembly.

[0020] In a preferred embodiment, the operating handle is connected to the cutting component via a connecting joint, and the connecting joint is provided with a relief recess for avoiding the support plate.

[0021] In a preferred embodiment, the cutting element is connected to a drive motor, which is at least partially housed inside the operating handle, and the operating handle is provided with control buttons for controlling the start and stop of the drive motor.

[0022] In a preferred embodiment, the drive motor is connected to the cutting component via a transmission assembly. The cutting component includes a disc-shaped cutter and a rotating shaft connected to the cutter. The transmission assembly consists of a meshing worm gear and a worm. The output shaft of the drive motor is connected to the worm, and the worm gear is connected to the rotating shaft.

[0023] Compared with the prior art, the beneficial effects of the present invention are: by changing the eccentricity between the rotation center and the clamping center of the cutting workpiece by sliding the adjustment knob, the cutting position can be adjusted, so that the pipe cutting device can adapt to the cutting of pipes from small diameter to large diameter, greatly improving the versatility and adaptability of the pipe cutting device; after the adjustment knob is slid to the predetermined position and locked, it is ensured that the eccentricity between the rotation center and the clamping center of the cutting workpiece remains unchanged during the cutting process, thereby ensuring the stability and accuracy of the cutting process. Attached Figure Description

[0024] Figure 1 This is one of the structural schematic diagrams of a pipe cutting device according to this application;

[0025] Figure 2 This is a schematic diagram of the turntable structure in this application;

[0026] Figure 3 This is one of the structural schematic diagrams of the installation disk assembly in this application;

[0027] Figure 4 This is the second structural schematic diagram of the installation disk assembly in this application;

[0028] Figure 5 This is one of the structural schematic diagrams of the pressure plate in this application;

[0029] Figure 6 This is the second schematic diagram of the pressure plate structure in this application;

[0030] Figure 7 This is one of the structural schematic diagrams of the connecting disk in this application;

[0031] Figure 8 This is the second structural schematic diagram of the connecting disk in this application;

[0032] Figure 9 This is a second schematic diagram of the structure of a pipe cutting device according to this application;

[0033] Figure 10 This is the third schematic diagram of a pipe cutting device according to this application;

[0034] Figure 11 For this application Figure 10 A magnified view of a section at point A in the middle;

[0035] Figure 12 This is a schematic diagram of the adjustment knob in this application;

[0036] Figure 13 This is a schematic diagram of the connection joint structure of this application;

[0037] Figure 14 This is a schematic diagram of the support disk structure of this application.

[0038] In the diagram: 1. Base assembly; 2. Mounting plate assembly; 3. Turntable; 4. Operating handle; 5. Connecting plate; 6. Pressure plate; 7. Arc groove; 8. Adjustment knob; 9. Stop lever; 10. First clamping block; 11. Second clamping block; 12. Annular protrusion; 13. Slide groove; 14. First roller assembly; 15. Chassis; 16. Arc plate; 17. Drive assembly; 18. Locking block; 19. Support plate; 20. Support base; 21. Control button; 22. Worm gear; 23. Worm; 24. Connecting joint; 25. Cutting piece; 26. Protrusion; 27. Anti-slip structure; 28. Indicator block; 29. ​​Avoidance recess; 30. Second roller assembly. Detailed Implementation

[0039] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0040] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0041] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 10 and Figure 11 As shown, this application discloses a pipe cutting device, including a base assembly 1, a mounting plate assembly 2, a turntable 3, and an operating handle 4. The base assembly 1 is provided with a clamping assembly for holding the pipe to be cut. The clamping assembly has a clamping center, and the axis of the clamping center coincides with the central axis of the clamped pipe. The mounting plate assembly 2 is rotatably connected to the base assembly 1, and the axis of rotation of the mounting plate assembly 2 coincides with the axis of the clamping center. The turntable 3 is rotatably connected to the mounting plate assembly 2, and the rotation center of the turntable 3 is eccentrically set with the rotation center of the mounting plate assembly 2. The operating handle 4 is located on the outside of the turntable 3 and connected to the turntable 3. The operating handle 4 is connected to a cutting element 25. The rotation center of the cutting piece 25 is eccentrically set with respect to the rotation center of the turntable 3. The mounting plate assembly 2 has a C-shaped notch, and the turntable 3 is at least partially located outside the notch. The mounting plate assembly 2 has an arc-shaped groove 7 and an adjusting knob 8. The adjusting knob 8 has a relaxed state and a locked state. In the relaxed state, the adjusting knob 8 can slide along the arc-shaped groove 7. When it slides to a predetermined position, it is locked. By sliding the adjusting knob 8 along the arc-shaped groove 7, the eccentricity between the rotation center of the cutting piece 25 and the clamping center can be continuously adjusted, thereby adjusting the cutting position. This allows the pipe cutting device to adapt to cutting pipes from smaller to larger diameters, greatly improving the versatility and adaptability of the pipe cutting device. Simultaneously, locking the adjusting knob 8 after it slides to the predetermined position ensures that the eccentricity between the rotation center of the cutting piece 25 and the clamping center remains constant during the cutting process, effectively preventing displacement caused by vibration or force during cutting, thus ensuring stability and accuracy during the cutting process. Furthermore, if the turntable 3 is completely located inside the mounting plate assembly 2, the eccentricity of the rotation center of the turntable 3 will be limited by the radius of the mounting plate assembly 2 itself. By placing at least part of the turntable 3 outside the notch, the rotation center of the turntable 3 can break through the radius limitation of the mounting plate assembly 2, and the eccentricity can be designed to be larger, thereby accommodating larger pipe diameters.

[0042] The mounting plate assembly 2 includes a connecting plate 5 and a pressure plate 6. The connecting plate 5 is rotatably connected to the base assembly 1. An arc-shaped groove 7 is provided on the pressure plate 6, which is part of a complete circle and is crescent-shaped. The arc-shaped groove 7 extends approximately along the arc direction of the pressure plate 6. A scale marking for indicating the diameter of the pipe to be cut is provided on the pressure plate 6 along the length of the arc-shaped groove 7. Specifically, the scale marking includes scale lines and corresponding numbers. The numbers represent the diameter of the pipe to be cut. The pipe diameter range that this application can cut is 6.35~114.3mm. The scale lines and numbers are respectively located on both sides of the arc-shaped groove 7, and the corresponding numbers gradually increase from top to bottom in a counterclockwise direction. A sliding groove 13 is formed between the pressure plate 6 and the connecting plate 5. An annular protrusion 12 extends continuously along the circumference of the outer peripheral wall of the turntable 3. The annular protrusion 12 is at least partially located within the sliding groove 13 and can rotate relative to the sliding groove 13.

[0043] Please refer to the following: Figure 4 , Figure 7 and Figure 8 As shown, to reduce friction when the turntable 3 rotates relative to the mounting plate assembly 2, the sidewall of the slide groove 13 is provided with several first roller assemblies 14, which are rotatably connected to the annular protrusion 12. Specifically, the sidewall of the slide groove 13 has several mounting slots along the radial direction of the connecting plate 5, and these mounting slots are evenly spaced along the slide groove 13. Each first roller assembly 14 includes a first connecting pin and a first roller disposed in the mounting slot. Each mounting slot has a first connecting pin, and the first roller is mounted on the first connecting pin and can rotate around it. In this way, when the turntable 3 rotates relative to the mounting plate assembly 2, sliding friction is converted into rolling friction, reducing the frictional force between the two.

[0044] like Figure 5 and Figure 6 As shown, specifically, the arc-shaped groove 7 includes a first groove and a second groove. The second groove is located at the bottom of the first groove, and the cross-section of the arc-shaped groove 7 is T-shaped. Specifically, the side of the pressure plate 6 facing the connecting plate 5 is the first side, and the other side is the second side. The first groove is located on the first side and is a continuous concave arc-shaped blind groove that does not penetrate the pressure plate 6. The second groove is located at the bottom of the first groove and is an arc-shaped through groove that penetrates the pressure plate 6. The width of the first groove is greater than the width of the second groove, thus together forming the arc-shaped groove 7 with a T-shaped cross-section. The adjusting knob 8 includes a first adjusting member and a second adjusting member. A protrusion 26 is provided at the end of the first adjusting member away from the second adjusting member. The protrusion 26 is housed in the first groove and can slide along its arc-shaped trajectory. The T-shaped groove provides a limiting channel for the protrusion 26 of the adjusting knob 8. The first groove acts as a guide groove, effectively preventing lateral offset or shaking during adjustment and ensuring more accurate adjustment of the eccentricity.

[0045] like Figure 1 and Figure 12 As shown, the second adjusting member further includes an integrally formed operating part and a connecting part. The connecting part is threadedly connected to the first adjusting member and is provided with an indicator block 28 for pointing to the scale markings. The operating part is provided with an anti-slip structure 27 for easy manual rotation. Specifically, the first adjusting member is rod-shaped with external threads on its outer surface. The connecting part of the second adjusting member is a hollow rod-shaped structure with internal threads. The internal and external threads engage to connect the first and second adjusting members. The operating part is located at one end of the connecting part. The anti-slip structure 27 is a textured surface or a recessed structure adapted for finger grip, facilitating manual turning. The loosening and locking states of the adjusting knob 8 are adjusted by the engagement of the external and internal threads. For more precise indication, the end of the indicator block 28 is an acute-angled structure, making its end sharper and thus better indicating its corresponding scale.

[0046] A stop lever 9 is provided on the turntable 3. The stop lever 9 is located on one side of the adjustment knob 8. When the operating handle 4 is turned, the turntable 3 rotates, which in turn drives the stop lever 9 to rotate as well. As the stop lever 9 rotates, it gradually approaches the adjustment knob 8 until it makes contact. After the two make contact, the mounting plate assembly 2 rotates with the turntable 3. At this time, the pipe to be cut begins to be cut. The pipe is rotated 360 degrees clockwise to complete the cutting of the corresponding pipe.

[0047] The scale numbers on the side of the arc-shaped groove 7 directly correspond to the pipe diameter. Different positions of the adjusting knob 8 on the arc-shaped groove 7 correspond to different eccentricities, that is, the distance between the rotation center of the cutting element 25 and the clamping center. The lower the position of the adjusting knob 8, the larger the corresponding eccentricity, and the larger the diameter of the pipe that the cutting element 25 can cut. When the adjusting knob 8 slides along the arc-shaped groove 7 in the direction of increasing scale value (counterclockwise), the eccentricity also increases to accommodate the cutting of larger diameter pipes. The user only needs to adjust the position of the adjusting knob 8 on the arc-shaped groove 7 according to the diameter of the pipe to cut it. At the same time, the turntable 3 is located outside the notch, breaking through the radius limitation of the mounting plate assembly 2, making the adjustable range of the eccentricity larger.

[0048] Please refer to Figure 9As shown, it can be understood that a drive assembly 17 is also provided on the base assembly 1. The clamping assembly is connected to the drive assembly 17. The clamping assembly includes a first clamping block 10 and a second clamping block 11. The drive assembly 17 is used to drive the first clamping block 10 and the second clamping block 11 to move relative to each other. The base assembly 1 includes a support base 20 and a support plate 19. The clamping assembly and the drive assembly 17 are both provided on the support base 20. The support plate 19 is provided on one side of the support base 20. The connecting plate 5 is rotatably connected to the support plate 19. The cutting piece 25 is located between the support plate 19 and the clamping assembly. Specifically, the drive assembly 17 is a lead screw. The first clamping block 10 and the second clamping block 11 are provided with installation channels along the length direction of the lead screw. Threaded sections are provided in the installation channels. The lead screw passes through the installation channels and engages with the threaded sections. By rotating the lead screw, the rotational motion of the lead screw is converted into linear movement of the first clamping block 10 and the second clamping block 11 in opposite directions along the axis of the lead screw, thereby adjusting the distance between them to accommodate clamping pipes of different diameters. In order to achieve a better clamping effect for the first clamping block 10 and the second clamping block 11, V-shaped locking blocks 18 are respectively connected to the inner sides of the first clamping block 10 and the second clamping block 11.

[0049] like Figure 9 and Figure 14 As shown, the support plate 19 is further connected to the support base 20 by bolts. The support plate 19 is roughly annular, and several second roller assemblies 30 are arranged on the annular structure. The lead screw is arranged on the support base 20. The connecting plate 5 includes a base plate 15 and an arc-shaped plate 16 arranged on the base plate 15. The arc-shaped plate 16 is coaxially arranged with the base plate 15, and the diameter of the arc-shaped plate 16 is larger than the diameter of the base plate 15. It should be noted that the second roller assembly 30 includes a second connecting pin and a second roller. The second rollers are evenly spaced along the inner peripheral wall of the annular structure of the support plate 19. The base plate 15 is located in the annular structure of the support plate 19, and its outer edge is in contact with the second roller assembly 30. The arrangement of the second roller assembly 30 converts the sliding friction between the connecting plate 5 and the support plate 19 into rolling friction, reducing the frictional force. The pressure plate 6 is connected to the connecting plate 5 by bolts, and the two rotate relative to the support plate 19 together.

[0050] like Figure 10 , Figure 11 and Figure 13 As shown, the operating handle 4 is connected to the cutting piece 25 via the connecting joint 24. To avoid interference, the connecting joint 24 is provided with a relief recess 29 for avoiding the support plate 19.

[0051] In one embodiment of this disclosure, the cutting component 25 is connected to a drive motor, which is wholly or partially housed inside the operating handle 4. The operating handle 4 is equipped with a control button 21 for starting and stopping the drive motor. The drive motor is connected to the cutting component 25 via a transmission assembly. The cutting component 25 includes a disc-shaped cutter and a rotating shaft connected to the cutter. The transmission assembly consists of a meshing worm gear 22 and a worm 23. The output shaft of the drive motor is coaxially connected to the worm 23. The meshing of the worm gear 22 and worm 23 forms a power transmission, and the worm gear 22 is fixedly connected to the rotating shaft, transmitting power to the cutter. The meshing of the worm gear 22 and worm 23 makes the transmission process smoother, helping to reduce vibration and operating noise. Furthermore, the cooperation between the worm gear 22 and worm 23 has a reverse self-locking characteristic, meaning that power can only be transmitted from the worm 23 to the worm gear 22 and cannot be transmitted in the reverse direction. After the drive motor stops, the cutting blade is immediately locked, preventing accidental rotation due to the reaction force of the pipe fittings, greatly enhancing the safety of the cutting device.

[0052] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A pipe cutting device, characterized in that, The utility model relates to a cutting device for cutting pipe, comprising: a base assembly (1) provided with a clamping assembly for clamping a pipe to be cut, the clamping assembly has a clamping center, and the axis of the clamping center coincides with the central axis of the pipe to be cut clamped; a mounting disc assembly (2) rotationally connected with the base assembly (1), the rotational center axis of the mounting disc assembly (2) coincides with the axis of the clamping center; a rotating disc (3) rotationally connected with the mounting disc assembly (2), the rotating center of the rotating disc (3) is eccentrically arranged with the rotating center of the mounting disc assembly (2); an operating handle (4) arranged on the outside of the rotating disc (3) and connected with the rotating disc (3), the operating handle (4) is connected with a cutting member (25), and the rotating center of the cutting member (25) is eccentrically arranged with the rotating center of the rotating disc (3); wherein the mounting disc assembly (2) is provided with a C-shaped opening, and the rotating disc (3) is at least partially located outside the opening; the mounting disc assembly (2) is provided with an arc-shaped groove (7) and an adjusting knob (8), the adjusting knob (8) has a loosening state and a locking state, in the loosening state, the adjusting knob (8) can slide along the arc-shaped groove (7), and the adjusting knob (8) is locked after being slid to a predetermined position; the eccentricity between the rotating center of the cutting member (25) and the clamping center is adjusted by sliding the adjusting knob (8) along the arc-shaped groove (7); the mounting disc assembly (2) comprises a connecting disc (5) and a pressing disc (6), the connecting disc (5) is rotationally connected with the base assembly (1), the arc-shaped groove (7) is arranged on the pressing disc (6), and the pressing disc (6) is provided with scale marks for indicating the diameter of the pipe to be cut along the length direction of the arc-shaped groove (7); a sliding groove (13) is formed between the pressing disc (6) and the connecting disc (5), and the outer peripheral wall of the rotating disc (3) continuously extends an annular protrusion (12) in the circumferential direction, the annular protrusion (12) is at least partially located in the sliding groove (13) and can rotate relative to the sliding groove (13).

2. The pipe cutting apparatus of claim 1, wherein, the arc-shaped groove (7) comprises a first groove body and a second groove body, the second groove body is arranged at the bottom of the first groove body, the cross section of the arc-shaped groove (7) is T-shaped, the adjusting knob (8) comprises a first adjusting member and a second adjusting member, a protrusion (26) is arranged at the end of the first adjusting member away from the second adjusting member, and the protrusion (26) is slidably arranged in the first groove body.

3. The pipe cutting apparatus of claim 2, wherein, the second adjusting member comprises an integral operation part and a connecting part, the connecting part is threadedly connected with the first adjusting member, the connecting part is provided with an indicating block (28) for pointing to the scale marks, and the operation part is provided with an anti-slip structure (27) facilitating manual rotation.

4. The pipe cutting apparatus of claim 1, wherein, the base assembly (1) is further provided with a driving assembly (17), the clamping assembly is connected with the driving assembly (17), the clamping assembly comprises a first clamping block (10) and a second clamping block (11), and the driving assembly (17) is used for driving the first clamping block (10) and the second clamping block (11) to move.

5. The pipe cutting apparatus of claim 4, wherein, The base assembly (1) comprises a support seat (20) and a support disc (19), the clamping assembly is arranged on the support seat (20), the support disc (19) is arranged on one side of the support seat (20), the connecting disc (5) is rotationally connected with the support disc (19); the cutting member (25) is located between the support disc (19) and the clamping assembly.

6. The pipe cutting apparatus of claim 5, wherein, The operating handle (4) is connected with the cutting member (25) through a connecting joint (24), and the connecting joint (24) is provided with a recessed avoiding portion (29) for avoiding the support disc (19).

7. The pipe cutting apparatus of claim 1, wherein, The cutting member (25) is connected with a driving motor, the driving motor is at least partially accommodated in the interior of the operating handle (4), and the operating handle (4) is provided with a control button (21) for controlling the starting and stopping of the driving motor.

8. The pipe cutting apparatus of claim 7, wherein, The driving motor is connected with the cutting member (25) through a transmission assembly, the cutting member (25) comprises a disc-shaped cutter and a rotating shaft connected with the cutter, and the transmission assembly comprises a worm wheel (22) and a worm (23) which are engaged with each other, the output shaft of the driving motor is connected with the worm (23), and the worm wheel (22) is connected with the rotating shaft.

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