A concrete cutting machine

Abstract

The present invention belongs to the technical field of concrete cutting, and specifically is a concrete cutting machine, comprising a frame, a push frame is fixed on one side of the top end of the frame, two groups of moving wheels are rotatably connected on both sides of the bottom end of the frame, a motor is arranged above the frame, a cutting blade is installed at the end of the rotating shaft of the motor, a knife cover is arranged above the cutting blade, a water spraying assembly for reducing dust and temperature is arranged on one side of the cutting blade, and a dust collecting assembly for collecting dust and mist is arranged on the other side of the cutting blade; the interior of a water storage chamber can be continuously pressurized by driving a second pulley to rotate through the rotation of the motor, and the water pressure inside the water storage chamber can be increased by pressurization, and the high-pressure water flow is transported through a drainage pipe and sprayed through a water spray head to reduce the temperature of the cutting blade and reduce dust and mist, and the high-pressure water tank can store high-pressure water, and when the pressure inside the water storage chamber is insufficient, the high-pressure water tank can provide high-pressure water flow to the drainage pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete cutting, in particular to a concrete cutting machine. Background Art

[0002] Concrete is a very important building material. It is widely used due to its high strength, simple production and durability. Concrete is usually used in road construction, house construction and other fields. After the concrete roads solidify, gaps need to be cut in them. The cut gaps can provide a certain space for the expansion of the concrete pavement when the temperature rises.

[0003] The prior art also proposes some solutions for concrete cutting. For example, a patent application with publication number CN112144362A discloses a concrete cutter, which can have both dry and wet cutting functions through a slide plate assembly.

[0004] When the above technical solution is in use, the saw disc is driven to cut the concrete by pushing the cutting machine. However, a large amount of dust and mist will be generated in the process of cutting the completely dry concrete. The dust and mist will float in the air. If the operator breathes the dust and mist into the body, it will cause damage. In addition, the saw blade will generate high temperature due to friction during the cutting process. The saw blade may break if it is exposed to high temperature for a long time, affecting the personal safety of the operator.

[0005] To this end, the present invention provides a concrete cutting machine. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a concrete cutting machine described in the present invention includes a frame, a push frame is fixed to one side of the top end of the frame, two sets of moving wheels are rotatably connected on both sides of the bottom end of the frame, a motor is arranged above the frame, a cutting blade is installed at the end of the rotating shaft of the motor, a blade cover is arranged above the cutting blade, a water spray assembly for reducing dust and cooling is arranged on one side of the cutting blade, and a dust suction assembly for collecting dust and mist is arranged on the other side of the cutting blade.

[0008] Preferably, a lifting frame is fixed to the middle part of the top end of the frame, a lifting plate is arranged inside the lifting frame, two sliding columns are arranged on both sides of the lifting frame, two sliding sleeves are arranged on both sides of the lifting plate, the sliding sleeves of the lifting plate form a sliding structure outside the sliding columns of the lifting frame, a stud is threadedly connected to the top end of the lifting frame, the bottom end of the stud is threadedly connected to the top end of the lifting plate, the bottom end of the lifting plate is fixedly connected to the top end of the motor, and one end of the knife cover is fixedly connected to an end of the lifting plate close to the cutting blade.

[0009] Preferably, the water spray assembly includes a water tank arranged between the motor and the push frame, the bottom end of the water tank is fixedly connected to the top end of the frame, a water storage chamber is arranged inside the water tank, a drain pipe is arranged on one side of the water tank, two water spray heads are arranged on the side of the drain pipe close to the cutting blade, and the water spray heads are arranged at both ends of the cutting blade.

[0010] Preferably, a second pulley is provided at one end of the water tank near the cutting blade, and a rotating shaft is fixed at one end of the second pulley near the water tank, an active chamber is provided inside the water tank, the rotating shaft is rotatably connected to the inside of the active chamber, the rotating shaft is provided with two sections, a flip arm is fixed between the two sections of the rotating shaft, the bottom end of the flip arm is rotatably connected to a connecting rod, a telescopic rod is fixed to the bottom end of the connecting rod, a piston is fixed to the bottom end of the telescopic rod, an air cylinder is fixed at one end of the bottom end of the active chamber near the water storage chamber, the piston is provided inside the air cylinder, the outer diameter of the piston matches the inner diameter of the air cylinder, a plurality of through holes are provided inside the piston, a one-way valve sheet for air intake is provided inside the through holes, an air outlet is provided at the bottom end of the air cylinder, a one-way valve sheet for air outlet is provided inside the air outlet, and a guide hole for guiding the telescopic rod is provided at the top of the air cylinder.

[0011] Preferably, a support frame is fixed to one end of the lifting frame close to the cutting blade, one end of the support frame is rotatably connected to two transmission wheels, the outer sleeve of the transmission wheel is provided with a toothed belt, an output gear is fixed to the outside of the rotating shaft of the motor, the output gear is meshed with the toothed belt, and a first pulley is fixed to the lower end of the toothed belt away from the cutting blade, and the first pulley and the second pulley are connected by a belt.

[0012] Preferably, a water inlet is provided above the water storage chamber, a box cover is provided inside the water inlet, and a pressure relief valve is installed on the top of the box cover.

[0013] Preferably, an installation cavity is provided inside the water tank, a high-pressure water tank is fixed inside the installation cavity, one end of the high-pressure water tank is connected to a water inlet valve through a water pipe, the water inlet valve is arranged at the bottom end of the water storage cavity, and a solenoid valve is installed at the water outlet end of the high-pressure water tank, and the solenoid valve is connected to a drain pipe.

[0014] Preferably, the dust suction assembly includes a dust hood arranged on the side of the cutting blade away from the water tank, a hose is fixed to the side of the dust hood away from the cutting blade, a dust collecting tank is fixed to the end of the hose away from the dust hood, the bottom end of the dust collecting tank is fixedly connected to the frame, an air pump is arranged on the side of the dust collecting tank away from the hose, the bottom end of the air pump is fixedly connected to the frame, an air inlet of the air pump is fixed with an air extraction pipe, and the other end of the air extraction pipe is fixedly connected to the top of the dust collecting tank.

[0015] Preferably, a movable frame is fixed to the outside of the dust collecting hood, a slide groove is opened at one end of the frame close to the dust collecting hood, one end of the movable frame is inserted into the inside of the slide groove, a pull rope is fixed to the end of the movable frame away from the dust collecting hood, the other end of the pull rope is fixedly connected to the lifting plate, a guide bracket is fixed to the top of the frame near the lifting plate, a roller is rotatably connected to the inside of the guide bracket, the pull rope is wrapped around the outside of the roller, and the inside of the slide groove and the top of the frame are also rotatably connected to rollers for guiding the pull rope.

[0016] Preferably, a pull rope is fixed to one end of the movable frame away from the dust collecting hood, and the other end of the pull rope is fixedly connected to the lifting plate. A guide bracket is fixed to the top of the frame near the lifting plate. The inside of the guide bracket is rotatably connected to a roller, and the pull rope is wrapped around the outside of the roller. The inside of the slide groove and the top of the frame are also rotatably connected to rollers for guiding the pull rope.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The concrete cutting machine described in the present invention can continuously pressurize the interior of the water storage chamber by driving the second pulley to rotate through the rotation of the motor. The water flow pressure inside the water storage chamber is increased by pressurization. The high-pressure water flow is transported through the drainage pipe and sprayed through the water spray head to cool the cutting blade and reduce dust and mist. The high-pressure water tank can store high-pressure water. When the pressure inside the water storage chamber is insufficient, the high-pressure water tank can provide high-pressure water flow to the drainage pipe.

[0019] 2. The concrete cutting machine described in the present invention can collect dust mist generated by cutting with a cutting blade through a dust hood. When adjusting the height of the cutting blade, the lifting plate synchronously drives the dust hood to move through a pull rope, thereby automatically controlling the distance between the dust hood and the cutting blade, thereby preventing the cutting blade from affecting the dust hood during the cutting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 is a stereogram of the present invention;

[0022] Figure 2 It is another perspective stereogram of the present invention;

[0023] Figure 3 It is a schematic diagram of the lifting frame structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the support frame structure in the present invention;

[0025] Figure 5 It is a schematic diagram of the internal structure of the water tank in the present invention;

[0026] Figure 6 It is a schematic diagram of the internal structure of the inflator in the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the dust collecting hood in the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the mobile rack in the present invention.

[0029] In the figure: 1, frame; 11, push frame; 12, moving wheel; 2, cutting blade; 21, knife cover; 3, water tank; 31, support frame; 311, transmission wheel; 312, toothed belt; 313, first pulley; 32, second pulley; 321, rotating shaft; 322, movable chamber; 323, turning arm; 324, connecting rod; 325, telescopic rod; 326, piston; 327, inflator; 33, box cover; 331, pressure relief valve; 34, water storage chamber; 35, high Water pressure tank; 351, water inlet valve; 352, solenoid valve; 353, installation cavity; 36, drain pipe; 361, sprinkler head; 4, dust hood; 41, movable frame; 411, slide; 412, guide rod; 413, spring; 42, hose; 43, dust tank; 44, vacuum pump; 441, vacuum pipe; 45, pull rope; 451, guide bracket; 452, roller; 5, motor; 51, output gear; 6, lifting frame; 61, lifting plate; 62, stud. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] like Figure 1 to Figure 2 As shown, a concrete cutting machine according to an embodiment of the present invention comprises a frame 1, a push frame 11 is fixed to one side of the top of the frame 1, two sets of moving wheels 12 are rotatably connected to both sides of the bottom of the frame 1, a motor 5 is arranged above the frame 1, a cutting blade 2 is installed at the end of the rotating shaft of the motor 5, a blade cover 21 is arranged above the cutting blade 2, a water spray assembly for reducing dust and cooling is arranged on one side of the cutting blade 2, and a dust suction assembly for collecting dust and mist is arranged on the other side of the cutting blade 2;

[0032] After the concrete pavement solidifies, the characteristics of thermal expansion and contraction will cause the concrete pavement to expand in a high temperature environment. Therefore, it is necessary to cut a gap in the concrete. The space in the gap can be used to buffer the expansion of the concrete. When cutting, the push frame 11 is pushed to drive the frame 1 to move. The frame 1 moves to the position where cutting is required through the moving wheels 12. Then, the motor 5 is energized to rotate its shaft. The shaft of the motor 5 drives the cutting blade 2 to rotate. The cutting blade 2 contacts the concrete to cut the concrete. During the cutting process, the blade cover 21 protects the top of the cutting blade 2. The water spray component can cool the surface of the cutting blade 2 during the cutting process. At the same time, the water mist can reduce the dust mist generated. The dust suction component can suction the dust mist to prevent the staff from inhaling the dust mist.

[0033] like Figures 1 to 3 As shown, a lifting frame 6 is fixed to the middle of the top of the frame 1, a lifting plate 61 is arranged inside the lifting frame 6, two sliding posts are arranged on both sides of the lifting frame 6, two sliding sleeves are arranged on both sides of the lifting plate 61, and the sliding sleeves of the lifting plate 61 form a sliding structure outside the sliding posts of the lifting frame 6, a stud 62 is threadedly connected to the top of the lifting frame 6, the bottom end of the stud 62 is threadedly connected to the top of the lifting plate 61, the bottom end of the lifting plate 61 is fixedly connected to the top of the motor 5, and one end of the knife cover 21 is fixedly connected to one end of the lifting plate 61 close to the cutting blade 2;

[0034] Before use, the height of the water tank 3 is adjusted according to the required cutting depth. At this time, the stud 62 is rotated to push the lifting plate 61 downward, and the sliding sleeves on both sides of the lifting plate 61 slide outside the sliding column of the lifting frame 6 to guide the movement of the lifting plate 61. At this time, the lifting plate 61 drives the motor 5 and the knife cover 21 to move downward, and the motor 5 drives the cutting blade 2 to move downward, so that the height of the cutting blade 2 can be adjusted. The cutting depth of the concrete will also be different when the cutting blade 2 is at different heights.

[0035] like Figure 1 and Figure 5 As shown, the water spray assembly includes a water tank 3 disposed between the motor 5 and the push frame 11, the bottom end of the water tank 3 is fixedly connected to the top end of the frame 1, a water storage chamber 34 is disposed inside the water tank 3, a drain pipe 36 is disposed on one side of the water tank 3, and two water spray heads 361 are disposed on one side of the drain pipe 36 close to the cutting blade 2, and the water spray heads 361 are disposed at both ends of the cutting blade 2;

[0036] When in use, the water storage chamber 34 inside the water tank 3 is filled with water, and then the water can be transported through the drain pipe 36, and then the water is sprayed onto the surface of the cutting blade 2 through the water spray head 361, which can cool the cutting blade 2 when cutting and reduce dust and mist.

[0037] like Figures 5 and 6As shown, a second pulley 32 is provided at one end of the water tank 3 near the cutting blade 2, a rotating shaft 321 is fixed at one end of the second pulley 32 near the water tank 3, an active cavity 322 is provided inside the water tank 3, the rotating shaft 321 is rotatably connected inside the active cavity 322, the rotating shaft 321 is provided with two sections, a flip arm 323 is fixed between the two sections of the rotating shaft 321, the bottom end of the flip arm 323 is rotatably connected to a connecting rod 324, a telescopic rod 325 is fixed to the bottom end of the connecting rod 324, and the bottom end of the telescopic rod 325 is fixed A piston 326 is fixed, and an air cylinder 327 is fixed at one end of the bottom of the movable chamber 322 near the water storage chamber 34. The piston 326 is arranged inside the air cylinder 327. The outer diameter of the piston 326 matches the inner diameter of the air cylinder 327. A plurality of through holes are provided inside the piston 326. A one-way valve for air intake is provided inside the through holes. An air outlet is provided at the bottom of the air cylinder 327. A one-way valve for air discharge is provided inside the air outlet. A guide hole for guiding the telescopic rod 325 is provided at the top of the air cylinder 327.

[0038] During the water spraying process of the water spray head 361, insufficient pressure will occur if the water flow is sprayed only by the gravity inside the water storage chamber 34, resulting in the water spray head 361 being unable to spray water mist. Therefore, it is necessary to pressurize the inside of the water storage chamber 34. At this time, the second pulley 32 is rotated to drive the rotating shaft 321 to rotate, and the rotating shaft 321 drives the flip arm 323 to flip 180°. During the flipping process of the flip arm 323, the connecting rod 324 is pulled upward, and the connecting rod 324 drives the telescopic rod 325 to move the piston 326 upward. During this process, the one-way valve sheet at the bottom of the inflation cylinder 327 is closed, and the one-way valve sheet inside the through hole of the piston 326 is opened. The inflation cylinder 327 is filled with air through the piston 326. The through hole of the rotating arm 323 allows air to enter, and then the rotating arm 323 continues to rotate 180 degrees. At this time, the rotating arm 323 pushes the connecting rod 324 downward during the rotating process, and the connecting rod 324 pushes the telescopic rod 325 into the interior of the inflation cylinder 327. The telescopic rod 325 drives the piston 326 to move downward. During this process, the one-way valve plate inside the through hole of the piston 326 is closed, and the one-way valve plate at the bottom of the inflation cylinder 327 is opened, so that the air inside the inflation cylinder 327 can be discharged into the water storage chamber 34. In this way, the inside of the water storage chamber 34 can be pressurized by reciprocating. By pressurizing, the water flow inside the water storage chamber 34 can be transported to the inside of the drain pipe 36 with a higher pressure, and the water spray head 361 can spray water mist more smoothly.

[0039] like Figures 3 to 5 As shown, a support frame 31 is fixed to one end of the lifting frame 6 close to the cutting blade 2, one end of the support frame 31 is rotatably connected to two transmission wheels 311, the outer sleeve of the transmission wheel 311 is provided with a toothed belt 312, an output gear 51 is fixed to the outer side of the rotating shaft of the motor 5, the output gear 51 is meshed and connected with the toothed belt 312, a first pulley 313 is fixed to the lower end of the toothed belt 312 away from the cutting blade 2, and the first pulley 313 is connected to the second pulley 32 through a belt;

[0040] During the cutting process of the motor 5, the output gear 51 will be driven to rotate synchronously. At this time, the output gear 51 drives the toothed belt 312 to rotate, and the toothed belt 312 drives the two transmission wheels 311 to rotate. The lower transmission wheel 311 drives the first pulley 313 to rotate, and the first pulley 313 drives the second pulley 32 to rotate through the belt, so that the inside of the water storage chamber 34 can be pressurized when the motor 5 is started, reducing the operation steps, and during the adjustment process of the motor 5, the output gear 51 will be driven to move downward. During this process, the toothed belt 312 remains in a fixed state. The output gear 51 will automatically rotate as the motor 5 moves and remain in meshing with the toothed belt 312, so that the output gear 51 can remain connected with the toothed belt 312 after the position is adjusted.

[0041] like Figures 4 to 5 As shown, a water inlet is provided above the water storage chamber 34, a box cover 33 is provided inside the water inlet, and a pressure relief valve 331 is installed at the top of the box cover 33;

[0042] After the motor 5 is started, it will drive the output gear 51 to rotate continuously. The output gear 51 drives the second pulley 32 to rotate, which will continuously pressurize the inside of the water storage chamber 34. The continuously pressurized pressure will exceed the required pressure inside the water storage chamber 34. Therefore, when in use, the box cover 33 is fixed to the water inlet of the water storage chamber 34. The pressure relief valve 331 can automatically discharge gas to achieve constant pressure when the pressure inside the water storage chamber 34 exceeds the preset pressure, and when opening the box cover 33, the pressure inside the water storage chamber 34 is first released through the pressure relief valve 331.

[0043] like Figure 5 As shown, the water tank 3 is provided with an installation cavity 353 inside, a high-pressure water tank 35 is fixed inside the installation cavity 353, one end of the high-pressure water tank 35 is connected to a water inlet valve 351 through a water pipe, the water inlet valve 351 is arranged at the bottom end inside the water storage cavity 34, and a solenoid valve 352 is installed at the water outlet end of the high-pressure water tank 35, and the solenoid valve 352 is connected to the drain pipe 36;

[0044] After the water storage chamber 34 is pressurized, water flows into the high-pressure water tank 35 through the water inlet valve 351. The high-pressure water tank 35 can store the high-pressure water flow. When the drain pipe 36 needs to transport water, the solenoid valve 352 is opened. When the cutting is completed, the solenoid valve 352 is closed. At this time, the internal pressure of the water storage chamber 34 is in a balanced state with the high-pressure water tank 35. When the box cover 33 is opened, the internal pressure of the water storage chamber 34 is released. The internal pressure of the high-pressure water tank 35 is greater than the internal pressure of the water storage chamber 34, which can automatically close the water inlet valve 351. At this time, water can be added to the water storage chamber 34. When the motor 5 is just started, it takes a certain amount of time to pressurize the water storage chamber 34. At this time, opening the solenoid valve 352 can input the high-pressure water flow in the high-pressure water tank 35 into the drain pipe 36, and can provide water to the drain pipe 36 during the pressurization of the water storage chamber 34. When the internal pressure of the water storage chamber 34 is equal to the internal pressure of the high-pressure water tank 35, the water inlet valve 351 will be reopened to transport water to the high-pressure water tank 35.

[0045] like Figure 1 and Figure 7 As shown, the dust suction assembly includes a dust collecting hood 4 arranged on the side of the cutting blade 2 away from the water tank 3, a hose 42 is fixed to the side of the dust collecting hood 4 away from the cutting blade 2, a dust collecting tank 43 is fixed to the end of the hose 42 away from the dust collecting hood 4, the bottom end of the dust collecting tank 43 is fixedly connected to the frame 1, an air pump 44 is arranged on the side of the dust collecting tank 43 away from the hose 42, the bottom end of the air pump 44 is fixedly connected to the frame 1, an air inlet of the air pump 44 is fixedly provided with an air extraction pipe 441, and the other end of the air extraction pipe 441 is fixedly connected to the top end of the dust collecting tank 43;

[0046] When the cutting blade 2 is cutting, the vacuum pump 44 can be started to extract gas from the dust collecting tank 43 through the vacuum pipe 441. The dust collecting tank 43 is under negative pressure and air can be extracted into the dust collecting hood 4 through the hose 42. The dust collecting hood 4 can absorb the dust mist produced by the cutting blade 2, and the dust mist can enter the dust collecting tank 43 and be filtered.

[0047] like Figure 3 and Figure 8 As shown, a mobile frame 41 is fixed to the outside of the dust hood 4, a slide groove 411 is provided at one end of the frame 1 close to the dust hood 4, one end of the mobile frame 41 is inserted into the inside of the slide groove 411, a pull rope 45 is fixed to the end of the mobile frame 41 away from the dust hood 4, the other end of the pull rope 45 is fixedly connected to the lifting plate 61, a guide bracket 451 is fixed to the top of the frame 1 close to the lifting plate 61, a roller 452 is rotatably connected to the inside of the guide bracket 451, the pull rope 45 is wound around the outside of the roller 452, and the inside of the slide groove 411 and the top of the frame 1 are also rotatably connected to the roller 452 for guiding the pull rope 45;

[0048] When the cutting blade 2 is adjusted downward, it may come into contact with the dust hood 4. At this time, in order to prevent the cutting blade 2 from affecting the dust hood 4, the position of the dust hood 4 needs to be adjusted. When the cutting blade 2 is adjusted, the lifting plate 61 will move downward. At this time, the pull rope 45 will move downward. At this time, the pull rope 45 will pull the movable frame 41 to move inside the slide groove 411 under the action of the roller 452. The greater the downward movement distance of the lifting plate 61, the farther the movable frame 41 drives the dust hood 4 away from the cutting blade 2, so that the distance between the dust hood 4 and the cutting blade 2 can be automatically adjusted.

[0049] like Figure 8 As shown, a guide rod 412 is fixed inside the slide groove 411, and the guide rod 412 runs through the inside of the moving frame 41. A spring 413 is sleeved outside the guide rod 412, and one end of the spring 413 is fixedly connected to the moving frame 41, and the other end of the spring 413 is fixedly connected to the inner wall of the slide groove 411;

[0050] When the lifting plate 61 moves upward, the pull rope 45 will be driven to move. At this time, the elastic force of the spring 413 pushes the movable frame 41 to move in the direction of the cutting blade 2. The movable frame 41 moves and tightens the pull rope 45, so that the pull rope 45 is always in a taut state, so that the dust collecting hood 4 can be automatically reset.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A concrete cutting machine, characterized in that: The invention comprises a frame (1), a push frame (11) is fixed on one side of the top end of the frame (1), two sets of moving wheels (12) are rotatably connected on both sides of the bottom end of the frame (1), a motor (5) is arranged above the frame (1), a cutting blade (2) is installed at the end of the rotating shaft of the motor (5), a blade cover (21) is arranged above the cutting blade (2), a water spray assembly for reducing dust and cooling is arranged on one side of the cutting blade (2), and a dust suction assembly for collecting dust and mist is arranged on the other side of the cutting blade (2); The water spray assembly comprises a water tank (3) arranged between the motor (5) and the push frame (11), the bottom end of the water tank (3) being fixedly connected to the top end of the frame (1), a water storage chamber (34) being arranged inside the water tank (3), a drainage pipe (36) being arranged on one side of the water tank (3), two water spray heads (361) being arranged on one side of the drainage pipe (36) close to the cutting blade (2), and the water spray heads (361) being arranged at both ends of the cutting blade (2); A second pulley (32) is provided at one end of the water tank (3) close to the cutting blade (2); a rotating shaft (321) is fixed to one end of the second pulley (32) close to the water tank (3); an active cavity (322) is provided inside the water tank (3); the rotating shaft (321) is rotatably connected inside the active cavity (322); the rotating shaft (321) is provided with two sections; a flip arm (323) is fixed between the two sections of the rotating shaft (321); a connecting rod (324) is rotatably connected to the bottom end of the inside of the flip arm (323); a telescopic rod (325) is fixed to the bottom end of the connecting rod (324); the telescopic rod (325) is 5) is fixed with a piston (326) at the bottom end, an air cylinder (327) is fixed at one end of the bottom end of the movable chamber (322) close to the water storage chamber (34), the piston (326) is arranged inside the air cylinder (327), the outer diameter of the piston (326) matches the inner diameter of the air cylinder (327), a plurality of through holes are provided inside the piston (326), a one-way valve plate for air intake is provided inside the through holes, an air outlet is provided at the bottom end of the air cylinder (327), a one-way valve plate for air discharge is provided inside the air outlet, and a guide hole for guiding the telescopic rod (325) is provided at the top end of the air cylinder (327); The dust collection assembly comprises a dust collecting hood (4) arranged on a side of the cutting blade (2) away from the water tank (3); a hose (42) is fixed to the side of the dust collecting hood (4) away from the cutting blade (2); a dust collecting tank (43) is fixed to one end of the hose (42) away from the dust collecting hood (4); the bottom end of the dust collecting tank (43) is fixedly connected to the vehicle frame (1); an air pump (44) is arranged on the side of the dust collecting tank (43) away from the hose (42); the bottom end of the air pump (44) is fixedly connected to the vehicle frame (1); an air inlet of the air pump (44) is fixedly connected to an air extraction pipe (441); the other end of the air extraction pipe (441) is fixedly connected to the top end of the dust collecting tank (43); A lifting frame (6) is fixed at the middle of the top of the frame (1), a lifting plate (61) is arranged inside the lifting frame (6), two sliding columns are arranged on both sides of the lifting frame (6), two sliding sleeves are arranged on both sides of the lifting plate (61), the sliding sleeves of the lifting plate (61) form a sliding structure outside the sliding columns of the lifting frame (6), a stud (62) is threadedly connected to the top of the lifting frame (6), the bottom end of the stud (62) is threadedly connected to the top of the lifting plate (61), the bottom end of the lifting plate (61) is fixedly connected to the top of the motor (5), and one end of the knife cover (21) is fixedly connected to one end of the lifting plate (61) close to the cutting blade (2); A support frame (31) is fixed to one end of the lifting frame (6) close to the cutting blade (2); one end of the support frame (31) is rotatably connected to two transmission wheels (311); a toothed belt (312) is sleeved on the outside of the transmission wheel (311); an output gear (51) is fixed to the outside of the rotating shaft of the motor (5); the output gear (51) is meshedly connected to the toothed belt (312); a first belt pulley (313) is fixed to one end of the toothed belt (312) away from the cutting blade (2); the first belt pulley (313) and the second belt pulley (32) are connected via a belt; A water inlet is provided above the water storage chamber (34), a box cover (33) is provided inside the water inlet, and a pressure relief valve (331) is installed at the top of the box cover (33); The water tank (3) is provided with an installation cavity (353) inside, a high-pressure water tank (35) is fixed inside the installation cavity (353), one end of the high-pressure water tank (35) is connected to a water inlet valve (351) via a water pipe, the water inlet valve (351) is arranged at the bottom end inside the water storage cavity (34), a solenoid valve (352) is installed at the water outlet end of the high-pressure water tank (35), and the solenoid valve (352) is connected to a drainage pipe (36); A movable frame (41) is fixed to the outside of the dust hood (4); a slide groove (411) is provided at one end of the frame (1) close to the dust hood (4); one end of the movable frame (41) is inserted into the inside of the slide groove (411); a pull rope (45) is fixed to one end of the movable frame (41) away from the dust hood (4); the other end of the pull rope (45) is fixedly connected to the lifting plate (61); a guide bracket (451) is fixed to the top of the frame (1) close to the lifting plate (61); a roller (452) is rotatably connected to the inside of the guide bracket (451); the pull rope (45) is wound around the outside of the roller (452); the inside of the slide groove (411) and the top of the frame (1) are also rotatably connected to the roller (452) for guiding the pull rope (45); A guide rod (412) is fixed inside the slide groove (411), and the guide rod (412) penetrates the interior of the moving frame (41). A spring (413) is sleeved outside the guide rod (412), and one end of the spring (413) is fixedly connected to the moving frame (41), and the other end of the spring (413) is fixedly connected to the inner wall of the slide groove (411).

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