Workbench for pipeline cutting

Abstract

The utility model discloses a workbench for pipeline cutting, and belongs to the technical field of pipeline cutting. Comprising a fixing mechanism, a protection mechanism, a first driving mechanism, a second driving mechanism, a third driving mechanism and a cutting mechanism, the fixing mechanism comprises a workbench, a driving part is installed in the workbench, the protection mechanism comprises a U-shaped baffle and a transparent plate, and connecting blocks are connected between the two ends of the transparent plate and the two ends of the U-shaped baffle correspondingly; the driving part drives the transparent plate and the U-shaped baffle to move in the Z-axis direction, the inner side of the U-shaped baffle and the inner side of the transparent plate are attached to the four side faces of the workbench respectively, and the cutting mechanism is arranged above the workbench and cuts a pipeline to the top of the workbench. The workbench applied to pipeline cutting can achieve the purpose of preventing scraps generated by cutting from splashing all around.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline cutting, in particular to a workbench for pipeline cutting. Background Art

[0002] A pipeline is a device connected by pipes, pipe connectors, and valves for transporting gases, liquids, or fluids containing solid particles. Pipes have a wide range of uses, primarily in water supply, drainage, heating, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering, and various industrial installations.

[0003] Pipes need to be cut into different sizes before use. When using a circular saw to cut pipes, especially metal pipes, high-temperature metal chips will be generated and fly around. After these metal chips fly around, they not only increase the user's cleaning work, but also pose a danger to the user himself. For example, the flying chips will splash into the eyes of users who are not wearing protective gear, or directly contact the user's skin. However, in the existing technology, most pipe cutting workbenches do not have the function of blocking flying chips, which will have a certain impact on the user's operation. Utility Model Content

[0004] The purpose of the present invention is to provide a pipe cutting workbench to solve the problem that most pipe cutting workbenches proposed in the above background art do not have the function of blocking flying chips, thereby increasing the cleaning work of the user and causing danger to the user himself.

[0005] In view of the above problems, the technical solution proposed by the present invention is:

[0006] A workbench for pipe cutting includes a fixing mechanism, a protective mechanism, and a cutting mechanism. The fixing mechanism includes a workbench. A driving member is installed inside the workbench. The protective mechanism includes a U-shaped baffle and a transparent plate. Connecting blocks are connected between the ends of the transparent plate and the U-shaped baffle. The driving member drives the transparent plate and the U-shaped baffle to move in the Z-axis direction. The inner sides of the U-shaped baffle and the transparent plate are respectively in contact with the four side surfaces of the workbench. The cutting mechanism is arranged above the workbench. The cutting mechanism cuts the pipe on the top of the workbench.

[0007] Furthermore, four groups of first slide grooves are provided inside the workbench, second slide grooves are provided on the four sides of the workbench, a third slide groove is provided at the inner center of the workbench, and the two ends of the first slide groove are respectively connected to the second slide groove and the third slide groove, second slide bars are installed at the inner center of the U-shaped baffle and the transparent plate, the bottom sides of the second slide bars are connected to the first slide bars, and threaded rings are connected between the first slide bars, the first slide bar slides in the first slide groove, the second slide bar slides in the second slide groove, and the threaded ring slides inside the third slide groove.

[0008] Furthermore, the driving member includes a first motor and a threaded rod, the threaded rod is rotatably connected to the bottom end of the third slide groove, and an installation cavity is also provided inside the workbench. The first motor is installed in the installation cavity, and the output end of the first motor is transmission-connected to the threaded rod, and the threaded ring and the threaded rod are threadedly engaged.

[0009] The beneficial effect of adopting the above-mentioned further scheme is that, from a top-down perspective, the U-shaped baffle, the transparent plate, and the pair of connecting blocks form a rectangular space, the length and width of which are consistent with the length and width of the workbench, so that the workbench can be wrapped. After the first motor drives the threaded rod to rotate, the threaded ring can drive the first slide bar to move upward, so that the U-shaped baffle, the transparent plate, and the pair of connecting blocks can rise upward and block the four sides of the workbench. During this process, the second slide bar and the second slide groove can ensure the stability of the rising of the U-shaped baffle and the transparent plate, and the cutting work of the pipe occurs on the top of the workbench and is blocked by the U-shaped baffle and the transparent plate. Therefore, the flying chips generated during the cutting process will be blocked by the U-shaped baffle and the transparent plate to reduce the possibility of flying chips splashing and reduce the amount of flying chips splashing. In the subsequent cleaning process, the user only needs to clean the top of the workbench, and at the same time it can provide protection to the surrounding users to prevent flying chips from directly contacting the user's skin or splashing into the user's eyes.

[0010] Furthermore, a fourth slide groove having the same width as the first slide groove is provided at the bottom of the first slide groove, a dustproof strip having the same length and width as the fourth slide groove is slidably provided inside the fourth slide groove, and the dustproof strip is installed at the bottom end of the first slide groove.

[0011] The beneficial effect of adopting the above further solution is that when the U-shaped baffle and the transparent plate rise, the dustproof strip will also be brought out from the fourth slide groove, so that the dustproof strip can cover the exposed first slide groove to prevent dust from entering from the first slide groove.

[0012] Furthermore, the pipe cutting workbench also includes a first driving mechanism, a second driving mechanism, and a third driving mechanism. The first driving mechanism includes a first base and a pair of fixed blocks. One side of the first base is installed on one side of the workbench through a pair of fixed blocks, and a first limiting groove is provided on the top of the first base. A first screw is rotatably connected in the first limiting groove, and the outer side of the first screw is threadedly engaged with a first limiting block that slides in the first limiting groove. A second motor is installed on the outer side of the first base, and the second motor and the first screw are transmission connected.

[0013] Furthermore, the transparent plate slides between the pair of fixed blocks, and the two sides of the transparent plate are in contact with the side surfaces of the pair of fixed blocks, and the connecting block and the fixed blocks are in contact with each other.

[0014] The beneficial effect of adopting the above further solution is that this connection method can isolate the first driving mechanism to the outside of the workbench, so that flying chips generated by cutting will not fall into the first limiting groove.

[0015] Furthermore, the second driving mechanism includes a fixed rod and a second base, the fixed rod is installed on the top of the first limit block, the second base is installed on the top of the side of the fixed rod, and the side of the second base is provided with a second limit groove, a second lead screw is rotatably connected in the second limit groove, the outer side of the second lead screw is threadedly engaged with the second limit block sliding in the second limit groove, a third motor is installed on the outer side of the second base, and the third motor and the second lead screw are transmission connected.

[0016] Furthermore, the third driving mechanism includes a machine base, which is installed on the side of the second limit block, and an electric telescopic rod is embedded in the bottom end of the machine base. The cutting mechanism includes a knife seat, which is installed at the telescopic end of the electric telescopic rod. The internal rotation of the knife seat is connected to a circular saw, and a fourth motor is installed on the outside of the knife seat. The output end of the fourth motor is transmission-connected to the circular saw.

[0017] The beneficial effect of adopting the above-mentioned further scheme is that the fourth motor drives the circular saw to rotate, and the electric telescopic rod drives the circular saw to move in the Z-axis direction, so that the circular saw comes into contact with the pipe to cut the pipe, and the third motor drives the second lead screw to rotate, so that the second limit block drives the circular saw to move in the X-axis direction, so that the circular saw can move directly above the pipe, and finally the second motor drives the first lead screw to rotate, so that the first limit block drives the circular saw to move in the Y-axis direction, so that the circular saw can cut different positions of the pipe.

[0018] Compared with the prior art, the beneficial effect of the present invention is that the pipe cutting workbench, when viewed from above, comprises a U-shaped baffle, a transparent plate, and a pair of connecting blocks forming a rectangular space, the length and width of which are consistent with the length and width of the workbench, thereby being able to wrap the workbench; driven by the driving member, the U-shaped baffle, the transparent plate, and a pair of connecting blocks can rise upward and block the four sides of the workbench, while the pipe cutting work occurs on the top of the workbench and is shielded by the U-shaped baffle and the transparent plate; therefore, the flying chips generated during the cutting process will be blocked by the U-shaped baffle and the transparent plate to reduce the possibility of flying chips splashing and reduce the amount of flying chips splashing; in the subsequent cleaning process, the user only needs to clean the top of the workbench, while being able to provide protection to the surrounding users to prevent flying chips from directly contacting the user's skin or splashing into the user's eyes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the first three-dimensional structure of the pipe cutting workbench disclosed in an embodiment of the present utility model;

[0020] Figure 2 This is a second three-dimensional structural diagram of the pipe cutting workbench disclosed in an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the exploded structure of the pipe cutting workbench disclosed in an embodiment of the present utility model;

[0022] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of structure A in the middle.

[0023] In the figure: 100, fixing mechanism; 1001, workbench; 1002, second slide; 1003, first slide; 1004, third slide; 1005, threaded rod; 1006, fourth slide; 200, protective mechanism; 2001, U-shaped baffle; 2002, transparent plate; 2003, connecting block; 2004, second slide; 2005, first slide; 2006, threaded ring; 2007, dustproof strip; 300, first driving mechanism; 3001, first base; 3002, first lead screw; 3003, second motor; 3004, fixed block; 3005, first limit block; 400, second drive mechanism; 4001, fixed rod; 4002, second base; 4003, second limit slot; 4004, second lead screw; 4005, third motor; 500, third drive mechanism; 5001, machine base; 5002, electric telescopic rod; 600, cutting mechanism; 6001, knife block; 6002, fourth motor; 6003, circular saw. DETAILED DESCRIPTION

[0024] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1 - Figure 4The utility model provides a technical solution: a pipe cutting workbench, comprising a fixing mechanism 100, a protective mechanism 200, and a cutting mechanism 600. The fixing mechanism 100 includes a workbench 1001. A driving member is installed inside the workbench 1001. The protective mechanism 200 includes a U-shaped baffle 2001 and a transparent plate 2002. Connecting blocks 2003 are connected between both ends of the transparent plate 2002 and the U-shaped baffle 2001. The driving member drives the transparent plate 2002 and the U-shaped baffle 2001 to move in the Z-axis direction. The inner sides of the U-shaped baffle 2001 and the transparent plate 2002 are respectively in contact with the four side surfaces of the workbench 1001. The cutting mechanism 600 is arranged above the workbench 1001. The cutting mechanism 600 cuts the pipe on the workbench 100 1, four groups of first slide grooves 1003 are provided inside the workbench 1001, second slide grooves 1002 are provided on all four sides of the workbench 1001, a third slide groove 1004 is provided at the center of the interior of the workbench 1001, and the two ends of the first slide groove 1003 are connected to the second slide groove 1002 and the third slide groove 1004 respectively, a second slide bar 2004 is installed at the center of the inner side of the U-shaped baffle 2001 and the transparent plate 2002, the bottom side of the second slide bar 2004 is connected to the first slide bar 2005, and a threaded ring 2006 is connected between the first slide bars 2005, the first slide bar 2005 slides in the first slide groove 1003, the second slide bar 2004 slides in the second slide groove 1002, and the threaded ring 2006 is inside the third slide groove 1004 The sliding drive member includes a first motor and a threaded rod 1005, and the threaded rod 1005 is rotatably connected to the bottom end of the third slide groove 1004. The interior of the workbench 1001 is also provided with a mounting cavity, and the first motor is installed in the mounting cavity, and the output end of the first motor is transmission-connected to the threaded rod 1005, and the threaded ring 2006 is threadedly engaged with the threaded rod 1005. From a top-down perspective, the U-shaped baffle 2001, the transparent plate 2002, and a pair of connecting blocks 2003 form a rectangular space, the length and width of the space are consistent with the length and width of the workbench 1001, so that the workbench 1001 can be wrapped. After the first motor drives the threaded rod 1005 to rotate, the threaded ring 2006 can drive the first slider 2005 to move upward, so that the U-shaped baffle 2001 and the transparent plate 2002 are connected. The plate 2002 and a pair of connecting blocks 2003 can rise upward and block the four sides of the workbench 1001. During this process, the second slide bar 2004 and the second slide groove 1002 can ensure the stability of the rise of the U-shaped baffle 2001 and the transparent plate 2002, and the pipe cutting work takes place on the top of the workbench 1001 and is shielded by the U-shaped baffle 2001 and the transparent plate 2002. Therefore, the flying chips generated during the cutting process will be blocked by the U-shaped baffle 2001 and the transparent plate 2002 to reduce the possibility and amount of flying chips splashing. In the subsequent cleaning process, the user only needs to clean the top of the workbench 1001, and at the same time, it can provide protection to the surrounding users to prevent the flying chips from directly contacting the user's skin.Or splash into the user's eyes.

[0026] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1 - Figure 4The utility model provides a technical solution: a pipe cutting workbench, comprising a fixing mechanism 100, a protective mechanism 200, and a cutting mechanism 600. The fixing mechanism 100 includes a workbench 1001, and a driving member is installed inside the workbench 1001. The protective mechanism 200 includes a U-shaped baffle 2001 and a transparent plate 2002. Connecting blocks 2003 are connected between the ends of the transparent plate 2002 and the U-shaped baffle 2001. The driving member drives the transparent plate 2002 and the U-shaped baffle 2001 to move in the Z-axis direction. The inner sides of the U-shaped baffle 2001 and the transparent plate 2002 are respectively connected to the workbench 1001. 01 is fitted with the four sides, the cutting mechanism 600 is arranged above the workbench 1001, the cutting mechanism 600 cuts the pipe on the top of the workbench 1001, the interior of the workbench 1001 is provided with four groups of first slide grooves 1003, the four sides of the workbench 1001 are provided with second slide grooves 1002, the inner center of the workbench 1001 is provided with a third slide groove 1004, and the two ends of the first slide groove 1003 are respectively connected to the second slide groove 1002 and the third slide groove 1004, the U-shaped baffle 2001 and the transparent plate 2002 are both installed with a second slide bar 2004 at the inner center, and the second slide bar 200 4 are connected to the bottom side of the first slide 2005, the first slide 2005 is connected with a threaded ring 2006, the first slide 2005 slides in the first slide 1003, the second slide 2004 slides in the second slide 1002, the threaded ring 2006 slides inside the third slide 1004, the driving member includes a first motor and a threaded rod 1005, the threaded rod 1005 is rotatably connected to the bottom end of the third slide 1004, the interior of the workbench 1001 is also provided with a mounting cavity, the first motor is mounted in the mounting cavity, and the output end of the first motor is transmission-connected to the threaded rod 1005, the threaded ring 20 06 is threadedly engaged with the threaded rod 1005, and the bottom of the first slide groove 1003 is provided with a fourth slide groove 1006 with the same width as the first slide groove 1003, and the interior of the fourth slide groove 1006 is slidably provided with a dust-proof strip 2007 with the same length and width as the fourth slide groove 1006, and the dust-proof strip 2007 is installed at the bottom end of the first slide groove 2005. When the U-shaped baffle 2001 and the transparent plate 2002 rise, the dust-proof strip 2007 will also be brought out from the fourth slide groove 1006, so that the dust-proof strip 2007 can cover the exposed first slide groove 1003 to prevent dust from entering from the first slide groove 1003.

[0028] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1 - Figure 4 The utility model provides a technical solution: a pipe cutting workbench, including a fixing mechanism 100, a first driving mechanism 300, a second driving mechanism 400, a third driving mechanism 500, and a cutting mechanism 600. The fixing mechanism 100 includes a workbench 1001. The cutting mechanism 600 cuts the pipe on the top of the workbench 1001. The first driving mechanism 300 includes a first base 3001 and a pair of fixing blocks 3004. One side of the first base 3001 is installed on one side of the workbench 1001 through a pair of fixing blocks 3004, and a first limiting groove is provided on the top of the first base 3001. A first lead screw 3002 is rotatably connected in the first limiting groove. The outer thread of the lead screw 3002 is engaged with a first limit block 3005 that slides in the first limit groove, a second motor 3003 is installed on the outer side of the first base 3001, and the second motor 3003 and the first lead screw 3002 are transmission-connected, the second driving mechanism 400 includes a fixed rod 4001 and a second base 4002, the fixed rod 4001 is installed on the top of the first limit block 3005, the second base 4002 is installed on the top of the side of the fixed rod 4001, and the side of the second base 4002 is provided with a second limit groove 4003, the second limit groove 4003 is rotatably connected with a second lead screw 4004, the outer thread of the second lead screw 4004 is engaged with There is a second limit block sliding in the second limit groove 4003, a third motor 4005 is installed on the outside of the second base 4002, and the third motor 4005 is connected to the second lead screw 4004 in transmission, the third drive mechanism 500 includes a machine base 5001, the machine base 5001 is installed on the side of the second limit block, and the bottom end of the machine base 5001 is embedded with an electric telescopic rod 5002, the cutting mechanism 600 includes a knife seat 6001, the knife seat 6001 is installed at the telescopic end of the electric telescopic rod 5002, the internal rotation of the knife seat 6001 is connected to the circular saw 6003, the outer side of the knife seat 6001 is installed with a fourth motor 6002, the output end of the fourth motor 6002 and the disc The saw 6003 is connected to the transmission, the fourth motor 6002 drives the circular saw 6003 to rotate, and the electric telescopic rod 5002 drives the circular saw 6003 to move in the Z-axis direction, so that the circular saw 6003 comes into contact with the pipe to cut the pipe, and the third motor 4005 drives the second screw 4004 to rotate, so that the second limit block drives the circular saw 6003 to move in the X-axis direction, so that the circular saw 6003 can move directly above the pipe, and finally the second motor 3003 drives the first screw 3002 to rotate, so that the first limit block 3005 drives the circular saw 6003 to move in the Y-axis direction, so that the circular saw 6003 can cut different positions of the pipe.

[0030] Specifically, the working principle of the pipe cutting workbench is as follows: when in use, a pair of clamps are fixed on the top of the workbench 1001, and the fixing method can be welding, bolting, etc., the two ends of the pipe are placed on the clamps, and the pipe is fixed with a pair of clamps, and then the third motor 4005 is started, and the third motor 4005 drives the second lead screw 4004 to rotate, so that the second limit block drives the circular saw 6003 to move in the X-axis direction, so that the circular saw 6003 can move directly above the pipe, and then the electric telescopic rod 5002 is extended to drive the circular saw 6003 to move in the Z-axis direction, so that the circular saw 6003 comes into contact with the pipe, and then the second motor 3003 is started, and the second motor 3003 drives the third motor 3003 to drive ... The threaded rod 3002 rotates, causing the first limit block 3005 to drive the circular saw 6003 to move in the Y-axis direction, so that the circular saw 6003 moves to the position where the pipe needs to be cut. Then the first motor is started. After the first motor drives the threaded rod 1005 to rotate, the threaded ring 2006 can drive the first slide bar 2005 to move upward, so that the U-shaped baffle 2001, the transparent plate 2002, and a pair of connecting blocks 2003 can rise upward and block the four sides of the workbench 1001 to complete the preparation work. Finally, the fourth motor 6002 is started, and the fourth motor 6002 drives the circular saw 6003 to rotate to cut the pipe. During the cutting process, the electric telescopic rod 5002 needs to be continuously extended until the pipe is cut off.

Claims

1. A pipe cutting workbench, characterized in that: The invention comprises a fixing mechanism (100), a protection mechanism (200), and a cutting mechanism (600). The fixing mechanism (100) comprises a workbench (1001). A driving member is installed inside the workbench (1001). The protection mechanism (200) comprises a U-shaped baffle (2001) and a transparent plate (2002). Connecting blocks (2003) are connected between the two ends of the transparent plate (2002) and the U-shaped baffle (2001). The driving member drives the transparent plate (2002) and the U-shaped baffle (2001) to move in the Z-axis direction. The inner sides of the U-shaped baffle (2001) and the transparent plate (2002) are respectively in contact with the four side surfaces of the workbench (1001). The cutting mechanism (600) is arranged above the workbench (1001). The cutting mechanism (600) cuts the pipe on the top of the workbench (1001).

2. A pipe cutting workbench according to claim 1, characterized in that: The workbench (1001) is provided with four groups of first chutes (1003) inside, the four sides of the workbench (1001) are provided with second chutes (1002), the inner center of the workbench (1001) is provided with a third chute (1004), and the two ends of the first chutes (1003) are respectively connected to the second chutes (1002) and the third chutes (1004), the inner center of the U-shaped baffle (2001) and the transparent plate (2002) are connected to each other. A second slide bar (2004) is installed at each location, the bottom side of each second slide bar (2004) is connected to a first slide bar (2005), a threaded ring (2006) is connected between the first slide bars (2005), the first slide bar (2005) slides in the first slide groove (1003), the second slide bar (2004) slides in the second slide groove (1002), and the threaded ring (2006) slides inside the third slide groove (1004).

3. A pipe cutting workbench according to claim 2, characterized in that: The driving member includes a first motor and a threaded rod (1005), the threaded rod (1005) is rotatably connected to the bottom end of the third slide groove (1004), and the interior of the workbench (1001) is also provided with an installation cavity, the first motor is installed in the installation cavity, and the output end of the first motor is transmission-connected to the threaded rod (1005), and the threaded ring (2006) and the threaded rod (1005) are threadedly engaged.

4. A pipe cutting workbench according to claim 3, characterized in that: The bottom of the first slide groove (1003) is provided with a fourth slide groove (1006) with the same width as the first slide groove (1003), and the inside of the fourth slide groove (1006) is provided with a dustproof strip (2007) with the same length and width as the fourth slide groove (1006), and the dustproof strip (2007) is installed at the bottom end of the first slide groove (2005).

5. A pipe cutting workbench according to claim 1, characterized in that: The invention also includes a first driving mechanism (300), a second driving mechanism (400), and a third driving mechanism (500), wherein the first driving mechanism (300) includes a first base (3001) and a pair of fixed blocks (3004), one side of the first base (3001) is mounted on one side of the workbench (1001) through the pair of fixed blocks (3004), and a first limiting groove is provided on the top of the first base (3001), a first lead screw (3002) is rotatably connected in the first limiting groove, the outer side of the first lead screw (3002) is threadedly engaged with a first limiting block (3005) that slides in the first limiting groove, a second motor (3003) is mounted on the outer side of the first base (3001), and the second motor (3003) and the first lead screw (3002) are transmission-connected.

6. A pipe cutting workbench according to claim 5, characterized in that: The transparent plate (2002) slides between the pair of fixed blocks (3004), and the two sides of the transparent plate (2002) are in contact with the side surfaces of the pair of fixed blocks (3004), and the connecting block (2003) and the fixed blocks (3004) are in contact with each other.

7. A pipe cutting workbench according to claim 5, characterized in that: The second driving mechanism (400) comprises a fixed rod (4001) and a second base (4002), wherein the fixed rod (4001) is mounted on the top of the first limiting block (3005), and the second base (4002) is mounted on the top of the side of the fixed rod (4001), and the side of the second base (4002) is provided with a second limiting groove (4003), a second lead screw (4004) is rotatably connected in the second limiting groove (4003), and the outer side of the second lead screw (4004) is threadedly engaged with the second limiting block sliding in the second limiting groove (4003), and a third motor (4005) is mounted on the outer side of the second base (4002), and the third motor (4005) and the second lead screw (4004) are transmission-connected.

8. A pipe cutting workbench according to claim 7, characterized in that: The third driving mechanism (500) comprises a machine base (5001), the machine base (5001) being mounted on the side of the second limit block, and an electric telescopic rod (5002) being embedded at the bottom end of the machine base (5001); the cutting mechanism (600) comprises a knife seat (6001), the knife seat (6001) being mounted on the telescopic end of the electric telescopic rod (5002); a circular saw (6003) being rotatably connected to the inside of the knife seat (6001); a fourth motor (6002) being mounted on the outside of the knife seat (6001); and an output end of the fourth motor (6002) being transmission-connected to the circular saw (6003).

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