Civil engineering road arc cutting equipment

Abstract

The invention is applicable to the field of civil engineering equipment, and provides civil engineering road arc cutting equipment which comprises a cart, a dust collector and a cutting assembly, and the cutting assembly is mounted on the cart; the dust collector is mounted on the cart; the cutting assembly is composed of a dust removal and sound insulation cylinder and an arc-shaped cutting knife assembly. The dust removal and sound insulation cylinder is mounted on the cart in a lifting manner through a cylinder telescopic rod arranged on the dust removal and sound insulation cylinder; the arc-shaped cutting knife assembly is installed on the cart in a lifting mode through a hydraulic cylinder arranged on the arc-shaped cutting knife assembly. The arc-shaped cutting knife assembly is composed of an arc-shaped cutting knife and a driving structure. The arc-shaped cutting knife assembly is lowered to the ground through the hydraulic cylinder, the driving structure is started, the arc-shaped cutting knife is driven to do reciprocating arc-shaped movement for cutting, precise local road surface cutting is achieved, and the cutting accuracy is high; and the dust removal and sound insulation cylinder is lowered to the cutting position of the arc-shaped cutting knife through the air cylinder telescopic rod, raised dust generated in the cutting process is removed, and noise generated in the cutting process is isolated.

Description

Technical Field

[0001] The invention relates to the field of civil engineering equipment, in particular to a civil engineering road arc cutting device. Background Art

[0002] Roads can be divided into highways, urban roads, rural roads, factory and mine roads, forestry roads, examination roads, competition roads, automobile test roads, workshop passages and school roads, etc.; in the process of road maintenance, the roads need to be marked and cut.

[0003] In the actual cutting operation process, when a certain range of asphalt pavement needs to be cut horizontally on the road, the operator first draws two lines according to the cutting width, and then pushes the cutting machine to cut the road along the two previously drawn lines in sequence.

[0004] However, this existing cutting machine can only perform straight-line cutting, and cannot perform arc-shaped cutting. Especially when facing the cutting of a local road surface, it is necessary to cut horizontally and vertically, which easily causes excessive cutting of the road surface and causes waste. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a civil engineering road arc cutting device, aiming to solve the problem that the existing cutting machine can only perform straight line cutting but not arc cutting, especially when facing local road surface cutting, it is necessary to cut horizontally and vertically, which easily causes excessive cutting of the road surface and waste.

[0006] Specifically: A civil engineering road arc cutting device, comprising:

[0007] A cart, which is used to improve walking maneuverability;

[0008] a cutting assembly mounted on a cart and used for cutting a road;

[0009] A vacuum cleaner, which is mounted on the cart and is used to remove dust generated during the cutting process of the cutting assembly;

[0010] The cutting assembly is composed of a dust-removing soundproof cylinder and an arc-shaped cutting knife assembly movably inserted inside the dust-removing soundproof cylinder; the dust-removing soundproof cylinder is installed on the cart by means of a cylinder telescopic rod provided therein, and is connected to a vacuum cleaner by means of a hose, so as to remove dust and provide sound insulation for the arc-shaped cutting knife assembly during the cutting process; the arc-shaped cutting knife assembly is installed on the cart by means of a hydraulic cylinder provided therein;

[0011] Start the hydraulic cylinder, use the hydraulic cylinder to lower the arc cutting knife assembly, and lower it to the ground to perform arc cutting. During this process, the cylinder telescopic rod lowers the dust and sound insulation cylinder and lowers it to the cutting position of the arc cutting knife assembly to remove the dust and sound generated during the cutting process.

[0012] The arc cutting knife assembly is composed of an arc cutting knife and a driving structure for driving the arc cutting knife to perform reciprocating arc movement cutting.

[0013] After pushing the cart to transport the vacuum cleaner and cutting assembly to the designated cutting point, use the hydraulic cylinder to lower the arc cutting knife assembly to the ground, start the drive structure, and drive the arc cutting knife to move back and forth in an arc shape for cutting, thereby achieving precise cutting of local road surfaces with high cutting accuracy. At the same time, the cylinder telescopic rod lowers the dust removal and sound insulation cylinder to the cutting position of the arc cutting knife to remove the dust generated during the cutting process and isolate the noise generated during the cutting process.

[0014] In the civil engineering road arc cutting equipment of the present invention, the cart comprises:

[0015] A table top, wherein a placement groove is provided on the table top;

[0016] A base frame, wherein the base frame is arranged parallel to the table top, and a plurality of running wheels are mounted on the base frame, wherein the running wheels are universal wheels and are provided with brake pads;

[0017] A storage box, which is installed between the table top and the base frame, and is provided with a switch door;

[0018] Support legs, two of which are provided and are distributed parallel to the storage box;

[0019] The cutting assembly is arranged on the table panel and distributed between the table panel and the base frame, while the hydraulic cylinder and the cylinder telescopic rod are both installed on the table panel.

[0020] Furthermore, two parallel armrests are provided on the table panel; wherein, a sleeve is provided on the armrest, a mounting rod is fixed on the sleeve, and the armrest is installed on the table panel by means of the mounting rod; an insertion rod is movably inserted into the sleeve, and is fixed by means of a limit pin, a plurality of limit holes are provided on the insertion rod, and the limit pins are inserted into different limit holes to adjust the length of the insertion rod inside the sleeve, thereby completing the length adjustment; a connecting arm is fixed on the insertion rod, and a grip rod is fixed on the connecting arm.

[0021] Furthermore, a mounting plate is provided at the bottom of the vacuum cleaner, and a plurality of locking plates distributed in an array are arranged around the mounting plate; a through hole is opened on the locking plate, and screws are inserted into the through hole to complete the detachable installation of the vacuum cleaner on the table panel.

[0022] In the civil engineering road arc cutting equipment of the present invention, the dust removal and sound insulation cylinder comprises:

[0023] A cylinder, wherein a plurality of exhaust holes distributed in an array are provided on the inner wall of the cylinder, and the exhaust holes are connected to an air guide cavity provided inside the cylinder wall of the cylinder;

[0024] A fixing ring, wherein the fixing ring is fixedly sleeved on the cylinder, and an exhaust head is installed on the fixing ring, one end of the exhaust head is connected to the air guide cavity, and the other end is connected to a hose, and is connected to the vacuum cleaner through the hose;

[0025] Wherein, sound insulation cotton is laid on the outer wall of the cylinder for sound insulation.

[0026] In the arc cutting equipment for civil engineering roads of the present invention, the driving structure includes a motor, which is fixed on a support platform; a rotating shaft is fixed on the output shaft of the motor, a rotating disk A is fixed on the rotating shaft, a rotating rod A is fixed on the rotating disk A, and the rotating rod A is rotatably connected to the rotating rod B through a rotating connector A; the rotating rod B is rotatably connected to the rotating rod C through a rotating connector B; one end of the rotating rod C is fixed on the arc cutting knife, and the other end is fixed on the rotating disk B, the rotating disk B is rotatably connected to the fixed rod B, and the fixed rod B is fixed on the support platform.

[0027] Furthermore, a fixing rod A is fixed on the support platform, and a mounting plate is fixed on the end of the fixing rod A away from the support platform; a plurality of fixing holes are opened on the mounting plate, and the mounting plate is fixed on the hydraulic cylinder by inserting bolts through the fixing holes.

[0028] Furthermore, the rotating connector A and the rotating connector B are provided with the same structure; the rotating connector A is composed of a rotating tube and a rotating shaft rotatably inserted inside the rotating tube; a bearing ring is provided between the rotating shaft and the rotating tube.

[0029] In the civil engineering road arc cutting equipment of the present invention, the arc cutting blade is provided with a plurality of detachably mounted arc plates;

[0030] A knife body is fixed at the end of the arc-shaped plate.

[0031] The arc cutting length can be adjusted by adjusting the number of arc plates installed.

[0032] Among them, multiple detachably installed arc plates can be specifically detachably installed by opening a card slot on the convex edge, or connected between two adjacent arc plates through a limit plate and detachably installed by screws, or detachably installed by using a threaded rod of the arc plate on one side to be threadedly inserted and fixed in a threaded hole on the arc plate on the other side, etc. There is no restriction on the specific structure, as long as the number of detachably installed arc plates can be met for adjusting the arc cutting length.

[0033] Compared with the prior art, the civil engineering road arc cutting equipment of the present invention pushes the cart to transport the vacuum cleaner and the cutting assembly to the designated cutting point, then uses the hydraulic cylinder to lower the arc cutting knife assembly to the ground, starts the driving structure, and drives the arc cutting knife to move back and forth in an arc shape for cutting, thereby achieving precise cutting of the local road surface with high cutting accuracy; at the same time, the cylinder telescopic rod lowers the dust removal and sound insulation cylinder to the cutting position of the arc cutting knife to remove the dust generated during the cutting process and isolate the noise generated during the cutting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the arc cutting equipment for civil engineering roads of the present invention;

[0035] Figure 2 for Figure 1 Schematic diagram of the structure of the middle cart;

[0036] Figure 3 for Figure 2 Schematic diagram of the middle handrail structure;

[0037] Figure 4 It is a schematic diagram of the structure of the dust removal and sound insulation cylinder in the civil engineering road arc cutting equipment of the present invention;

[0038] Figure 5 It is a structural schematic diagram of the arc cutting knife assembly in the arc cutting equipment for civil engineering roads of the present invention;

[0039] Figure 6 for Figure 5 Schematic diagram of the top view of the middle arc cutting knife assembly.

[0040] In the figure:

[0041] Cart 1, vacuum cleaner 2, cutting assembly 3;

[0042] A placement slot 11, a table top 12, an armrest 13, a storage box 14, a running wheel 15, a base frame 16, and a support leg 17;

[0043] Locking plate 21, mounting plate 22;

[0044] Dust removal and sound insulation cylinder 31, arc-shaped cutting knife assembly 32;

[0045] A gripping rod 131, a limiting pin 132, a sleeve 133, a mounting rod 134, an insertion rod 135, and a connecting arm 136;

[0046] Cylinder body 311, fixing ring 312, cylinder telescopic rod 313, air extraction hole 314, air extraction head 315;

[0047] Support platform 321, motor 322, rotating shaft 323, turntable A324, rotating rod A325, rotating connector A326, rotating rod B327, rotating connector B328, arc cutting knife 329, rotating rod C330, mounting plate 331, fixing rod A332, turntable B333, fixing rod B334. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0049] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0050] like Figure 1 , 2 , 4 and Figure 5 As shown, in the embodiment of the present invention: it includes a cart 1, a dust collector 2 and a cutting assembly 3, the cart 1 is used to improve the mobility of walking; the cutting assembly 3 is installed on the cart 1 and is used to cut the road; the dust collector 2 is installed on the cart 1 and is used to remove dust generated during the cutting process of the cutting assembly 3;

[0051] During the specific operation, the cart 1 is pushed, and the maneuverability provided by the cart 1 is used to transport the vacuum cleaner 2 and the cutting assembly 3 to the cutting point on the designated road, and the cutting assembly 3 is started to cut the road, while the vacuum cleaner 2 sucks and removes the dust generated during the cutting process of the cutting assembly 3;

[0052] The cutting assembly 3 is composed of a dust-removing soundproof cylinder 31 and an arc-shaped cutting knife assembly 32 movably inserted into the dust-removing soundproof cylinder 31; the dust-removing soundproof cylinder 31 is installed on the trolley 1 in a lifting manner through a cylinder telescopic rod 313 provided therein, and is connected to the vacuum cleaner 2 through a hose, so that the arc-shaped cutting knife assembly 32 can remove dust and sound during the cutting process; the arc-shaped cutting knife assembly 32 is installed on the trolley 1 in a lifting manner through a hydraulic cylinder provided therein; the arc-shaped cutting knife assembly 32 is composed of an arc-shaped cutting knife 329 and a driving structure for driving the arc-shaped cutting knife 329 to perform reciprocating arc-shaped cutting.

[0053] Start the hydraulic cylinder and use it to lower the arc cutting knife assembly 32 to the ground for arc cutting. During this process, the cylinder telescopic rod 313 lowers the dust removal and sound insulation cylinder 31 to the cutting position of the arc cutting knife assembly 32 to remove the dust and sound generated during the cutting process.

[0054] In the embodiment of the present invention, after pushing the cart 1 to transport the vacuum cleaner 2 and the cutting assembly 3 to the designated cutting point, the hydraulic cylinder is used to lower the arc cutting knife assembly 32 to the ground, and the driving structure is started to drive the arc cutting knife 329 to move back and forth in an arc shape for cutting, thereby achieving precise cutting of the local road surface with high cutting accuracy; at the same time, the cylinder telescopic rod 313 lowers the dust removal and sound insulation cylinder 31 to the cutting position of the arc cutting knife 329 to remove the dust generated during the cutting process and isolate the noise generated during the cutting process.

[0055] like Figure 2 and Figure 4 As shown, in the embodiment of the present invention: the cart 1 includes a table panel 12, a storage box 14, a base frame 16 and a support leg 17, the table panel 12 is provided with a placement slot 11; the base frame 16 is arranged in parallel with the table panel 12, and a plurality of running wheels 15 are installed on the base frame 16, the running wheels 15 are universal wheels, and brake pads are provided; the storage box 14 is installed between the table panel 12 and the base frame 16, and a switch door is provided on the storage box 14; two support legs 17 are provided, and are distributed in parallel with the storage box 14;

[0056] The cutting assembly 3 is arranged on the table panel 12 and distributed between the table panel 12 and the base frame 16 , and the hydraulic cylinder and the cylinder telescopic rod 313 are both installed on the table panel 12 .

[0057] At the same time, the hydraulic cylinder and the cylinder telescopic rod 313 can also be replaced by a screw rod and a nut to complete the lifting position adjustment through a threaded transmission, or replaced by a gear and a rack to complete the lifting position adjustment, etc., which are all existing technologies, and their components can also be purchased directly on the real name website, so there is no restriction on the specific structure, as long as it can meet the lifting adjustment requirements.

[0058] like Figure 2 and Figure 3 As shown, in the embodiment of the present invention: two parallel armrests 13 are arranged on the table panel 12; wherein, a sleeve 133 is provided on the armrest 13, a mounting rod 134 is fixed on the sleeve 133, and the armrest 133 is installed on the table panel 12 by means of the mounting rod 134; an insertion rod 135 is movably inserted into the sleeve 133, and is fixed by means of a limit pin 132, a plurality of limit holes are provided on the insertion rod 135, and the limit pin 132 is inserted into different limit holes to adjust the length of the insertion rod 135 inserted into the inside of the sleeve 133, so as to complete the length adjustment; a connecting arm 136 is fixed on the insertion rod 135, and a gripping rod 131 is fixed on the connecting arm 136.

[0059] When used by people of different heights, the length of the insertion rod 135 inserted into the sleeve 133 can be adjusted by inserting the limiting pin 132 into different limiting holes, so as to complete the height adjustment of the grip 131, achieve good adaptation and improve comfort.

[0060] like Figure 2 As shown, in the embodiment of the present invention: a mounting plate 22 is provided at the bottom of the vacuum cleaner 2, and a plurality of locking plates 21 distributed in an array are provided around the mounting plate 22; a through hole is opened on the locking plate 21, and screws are inserted into the through hole to complete the detachable installation of the vacuum cleaner 2 on the table panel 12.

[0061] like Figure 4 As shown, in the embodiment of the present invention: the dust removal sound insulation cylinder 31 includes a cylinder body 311 and a fixing ring 312; a plurality of exhaust holes 314 distributed in an array are provided on the inner wall of the cylinder body 311, and the exhaust holes 314 are connected to an air guide cavity provided inside the cylinder wall of the cylinder body 311; the fixing ring 312 is fixedly sleeved on the cylinder body 311, and an exhaust head 315 is installed on the fixing ring 312, one end of the exhaust head 315 is connected to the air guide cavity, and the other end is connected to a hose, and is connected to the vacuum cleaner 2 through the hose; wherein, sound insulation cotton is laid on the outer wall of the cylinder body 311 for sound insulation.

[0062] Start the vacuum cleaner 2, which uses the hose and the barrel 311 to cause the exhaust holes 314 to exhaust air. The cylinder telescopic rod 313 lowers the dust removal and sound insulation barrel 31 to the cutting position of the arc-shaped cutting knife 329, and uses the barrel 311 to be sleeved on the cutting position. The dust generated during the cutting process is removed through the multiple exhaust holes 314 distributed in an array, and the noise generated during the cutting process is isolated through the sound insulation cotton.

[0063] like Figure 5 and Figure 6 As shown, in the embodiment of the present invention: the driving structure includes a motor 322, and the motor 322 is fixed on the support platform 321; a rotating shaft 323 is fixed on the output shaft of the motor 322, a turntable A324 is fixed on the rotating shaft 323, a rotating rod A325 is fixed on the turntable A324, and the rotating rod A325 is rotatably connected to the rotating rod B327 via a rotating connector A326; the rotating rod B327 is rotatably connected to the rotating rod C330 via a rotating connector B328; one end of the rotating rod C330 is fixed on the arc cutting knife 329, and the other end is fixed on the turntable B333, the turntable B333 is rotatably connected to the fixed rod B334, and the fixed rod B334 is fixed on the support platform 321.

[0064] Start the motor 322, the motor 322 drives the rotating shaft 323 to rotate, the rotating shaft 323 drives the rotating rod A325 to rotate through the turntable A324, and drives the rotating rod B327 to swing. During the swinging process of the rotating rod B327, the rotating connector B328 is used as the force point to drive the rotating rod C330 to perform periodic arc swings around the turntable B333, thereby driving the arc cutting knife 329 to move back and forth in an arc for cutting, so as to achieve precise cutting of the local road surface with high cutting accuracy.

[0065] like Figure 5 As shown, in the embodiment of the present invention: a fixing rod A332 is fixed on the support platform 321, and a mounting plate 331 is fixed to the fixing rod A332 at one end away from the support platform 321; a plurality of fixing holes are opened on the mounting plate 331, and bolts are inserted into the fixing holes to fix on the hydraulic cylinder.

[0066] The rotating connector A326 and the rotating connector B328 have the same structure; the rotating connector A326 is composed of a rotating tube and a rotating shaft that rotates and penetrates inside the rotating tube; a bearing ring is provided between the rotating shaft and the rotating tube.

[0067] like Figure 5 As shown, in the embodiment of the present invention: the arc cutting knife 329 is provided with a plurality of detachably mounted arc plates; a knife body is fixed at the end of the arc plate. The arc cutting length can be adjusted by adjusting the number of arc plates installed.

[0068] Among them, multiple detachably installed arc plates can be specifically detachably installed by opening a card slot on the convex edge, or connected between two adjacent arc plates through a limit plate and detachably installed by screws, or detachably installed by using a threaded rod of the arc plate on one side to be threadedly inserted and fixed in a threaded hole on the arc plate on the other side, etc. There is no restriction on the specific structure, as long as the number of detachably installed arc plates can be met for adjusting the arc cutting length.

[0069] Working principle of the present invention:

[0070] After pushing the cart 1 to transport the vacuum cleaner 2 and the cutting assembly 3 to the designated cutting point, the hydraulic cylinder is used to lower the arc cutting knife assembly 32 to the ground, and the driving structure is started to drive the arc cutting knife 329 to move back and forth in an arc shape for cutting, thereby achieving precise cutting of the local road surface with high cutting accuracy; at the same time, the cylinder telescopic rod 313 lowers the dust removal and sound insulation cylinder 31 to the cutting position of the arc cutting knife 329 to remove the dust generated during the cutting process and isolate the noise generated during the cutting process.

[0071] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0072] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0073] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A civil engineering road arc cutting device, characterized in that: include: A cart, which is used to improve walking maneuverability; A cutting assembly, the cutting assembly being mounted on a cart and used for cutting a road; A vacuum cleaner, which is mounted on the cart and is used to remove dust generated during the cutting process of the cutting assembly; The cutting assembly is composed of a dust-removing soundproof cylinder and an arc-shaped cutting knife assembly movably inserted inside the dust-removing soundproof cylinder; the dust-removing soundproof cylinder is installed on the cart by means of a cylinder telescopic rod provided therein, and is connected to a vacuum cleaner by means of a hose, so as to remove dust and provide sound insulation for the arc-shaped cutting knife assembly during the cutting process; the arc-shaped cutting knife assembly is installed on the cart by means of a hydraulic cylinder provided therein; The arc cutting knife assembly is composed of an arc cutting knife and a driving structure for driving the arc cutting knife to perform reciprocating arc movement cutting.

2. The civil engineering road arc cutting device according to claim 1, characterized in that: The cart comprises: A table top, wherein a placement groove is provided on the table top; A base frame, wherein the base frame is arranged parallel to the table top, and a plurality of running wheels are mounted on the base frame, wherein the running wheels are universal wheels and are provided with brake pads; A storage box, which is installed between the table top and the base frame, and is provided with a switch door; Support legs, two of which are provided and are distributed parallel to the storage box; The cutting assembly is arranged on the table panel and distributed between the table panel and the base frame, while the hydraulic cylinder and the cylinder telescopic rod are both installed on the table panel.

3. The civil engineering road arc cutting equipment according to claim 2, characterized in that: The table top is provided with two parallel distributed handrails; Wherein, the armrest is provided with a sleeve, a mounting rod is fixed on the sleeve, and the armrest is mounted on the table panel by the mounting rod; An insertion rod is movably inserted into the casing and is fixed by a limit pin. A plurality of limit holes are provided on the insertion rod. The limit pins are inserted into different limit holes to adjust the length of the insertion rod inserted into the casing to complete the length adjustment. A connecting arm is fixed on the interpenetrating rod, and a gripping rod is fixed on the connecting arm.

4. The civil engineering road arc cutting device according to claim 2, characterized in that: A mounting plate is provided at the bottom of the vacuum cleaner, and a plurality of locking plates distributed in an array are provided around the mounting plate; The locking plate is provided with a through hole, and screws are inserted into the through hole to complete the detachable installation of the vacuum cleaner on the table panel.

5. The civil engineering road arc cutting device according to claim 1, characterized in that: The dust removal sound insulation cylinder comprises: A cylinder, wherein a plurality of exhaust holes distributed in an array are provided on the inner wall of the cylinder, and the exhaust holes are connected to an air guide cavity provided inside the cylinder wall of the cylinder; A fixing ring, wherein the fixing ring is fixedly sleeved on the cylinder, and an exhaust head is installed on the fixing ring, one end of the exhaust head is connected to the air guide cavity, and the other end is connected to a hose, and is connected to the vacuum cleaner through the hose; Wherein, sound insulation cotton is laid on the outer wall of the cylinder for sound insulation.

6. The civil engineering road arc cutting device according to claim 1, characterized in that: The driving structure includes a motor, which is fixed on the support platform; A rotating shaft is fixed on the output shaft of the motor, a rotating disk A is fixed on the rotating shaft, a rotating rod A is fixed on the rotating disk A, and the rotating rod A is rotatably connected to the rotating rod B through a rotating connector A; The rotating rod B is rotatably connected to the rotating rod C through the rotating connector B; One end of the rotating rod C is fixed on the arc-shaped cutting knife, and the other end is fixed on the rotating disk B. The rotating disk B is rotatably connected to the fixed rod B, and the fixed rod B is fixed on the supporting platform.

7. The civil engineering road arc cutting device according to claim 6, characterized in that: A fixing rod A is fixed on the support platform, and a mounting plate is fixed on one end of the fixing rod A away from the support platform; The mounting plate is provided with a plurality of fixing holes, and the mounting plate is fixed on the hydraulic cylinder by inserting bolts through the fixing holes.

8. The civil engineering road arc cutting device according to claim 6, characterized in that: The rotating connector A and the rotating connector B are provided with the same structure; The rotating connector A is composed of a rotating tube and a rotating shaft that is rotatably inserted into the rotating tube; A bearing ring is arranged between the rotating shaft and the rotating tube.

9. A civil engineering road arc cutting device according to any one of claims 1 to 8, characterized in that: The arc-shaped cutting knife is provided with a plurality of detachably mounted arc-shaped plates; A knife body is fixed at the end of the arc-shaped plate.

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