CN112112039A - A vacuum type road cutting machine - Google Patents

Abstract

A dust absorption type road surface cutting machine relates to the technical field of road surface cutting, and comprises a frame, a cutting saw blade and a driving device for driving the cutting saw blade to rotate, and is characterized by also comprising a fan impeller and a filter box, wherein the fan impeller rotates under the driving of the driving device, the fan impeller is covered with a fan cover, a preset number of filter elements are arranged in the filter box, an air exhaust hole communicated with an outlet of the filter elements is arranged on the filter box, the cutting saw blade is covered with a saw cover, a dust outlet is arranged on the saw cover, the dust outlet is positioned on a splashing path of dust splashed in the saw cover during the cutting operation of the cutting saw blade, an air inlet channel is communicated between the air suction side of the fan cover and the dust outlet, an air outlet channel is communicated between the air exhaust side of the fan cover and the filter box, the dust absorption type road surface cutting machine has compact structure, good dust removal effect and convenient use, the practicability is strong.

Description

A vacuum type road cutting machine

Technical field:

The invention relates to the technical field of road cutting, in particular to a dust-absorbing road cutting machine.

Background technique:

At present, the existing road cutting machine generates a lot of dust during the use process, which is not environmentally friendly. Although some machines are sprayed with water during the cutting process, which can reduce the dust, it also brings pollution to the ground, which increases the cleaning time in the later stage. Work.

There are also road cutting machines with additional dust removal devices in the prior art, but there are problems such as unreasonable overall structure, bulky and uncompact volume, unsatisfactory dust removal effect, and inconvenient use.

Invention content:

In order to solve the above technical problems, the present invention provides a dust suction type road cutting machine, which has a compact structure, good dust removal effect, convenient use and strong practicability.

The present invention is achieved through the following technical solutions:

A dust-absorbing road cutting machine includes a frame, a cutting saw blade and a driving device for driving the cutting saw blade to rotate, and is characterized in that it also includes a fan impeller and a filter box, and the fan impeller is driven by the driving device. Rotating, the fan impeller is covered with a fan cover, the filter box is equipped with a preset number of filter elements, the filter box is provided with an exhaust hole that communicates with the filter element outlet, and the cutting saw blade cover has a saw cover, The saw hood is provided with a dust outlet, and the dust outlet is located on the throwing path of the dust thrown out during the cutting operation of the saw blade in the saw hood, and the suction side of the fan hood is connected to the dust outlet. An air inlet channel is communicated between the ports, and an air outlet channel is communicated between the air exhaust side of the fan cover and the filter box.

In another aspect of the present invention, the filter box includes an upper box for installing the filter element and a lower box for collecting dust, the lower box is detachably connected to the lower end of the upper box, the A seal is arranged between the upper box body and the lower box body.

In another aspect of the present invention, two ends of the lower box body are respectively fixed with box buckles, and the lower box body is fixed to the lower end of the upper box body through the box buckles.

In another aspect of the present invention, it further includes a filter element fixing frame fixed in the upper case, the filter element is fixed in the upper case through the filter element fixing frame; and a knocking mechanism, the knocking mechanism includes a rotatable thread The connecting rod that passes over the box wall, the connecting rod is fixed with a knock rod and a rocker, the knock rod is located in the upper box, the rocker is located outside the upper box, and the knock rod follows the connecting rod. The rotation knocks on the filter element holder.

In another aspect of the present invention, the driving device includes an output shaft, on which a main pulley is fixed, and the fan impeller is fixed outside the main pulley; and also includes a rotatable fixed on the frame. A drive shaft, the cutting saw blade is fixed on the drive shaft, and a slave pulley is also fixed on the drive shaft, and the main pulley and the slave pulley are driven by a belt.

In another aspect of the present invention, the frame includes a base, an electric push cylinder fixing frame, a lift frame and an electric push cylinder, the electric push cylinder fixing frame is fixed above the front of the base, and the rear end of the lift frame It is hinged on the lower side of the base, the electric push cylinder fixing frame and the front end of the lifting frame are connected by an electric push cylinder, and the rear part of the base and the front part of the lifting frame are respectively provided with a preset number of bottom wheels.

In another aspect of the present invention, the lower opening of the saw cover is further provided with a blocking cover, the blocking cover can be moved up and down on one or more sides of the lower opening of the saw cover, and the blocking cover The lower end is lower than the saw hood.

In another aspect of the present invention, a blocking cover is further provided at the lower opening of the saw cover, and the blocking cover includes cover plates arranged on both sides of the saw cover, and a preset number of sliding slides are opened on the cover plates. A limit bolt for fastening the cover plate on the saw cover passes through the chute, and the chute is slidably hung up and down on the threaded rod of the limit bolt.

In another aspect of the present invention, the saw cover further includes a three-way connecting pipe, and the three-way connecting pipe includes a hole A connected with the air inlet channel, a hole B connected with the dust outlet, and a hole connected with the outside atmosphere. C hole, an air duct valve that switches between the B hole and the C hole is installed on the three-way connecting pipe.

In another aspect of the present invention, the saw cover further includes a three-way connecting pipe, the air duct valve includes a rotating shaft, a baffle plate and a positioning plate, the rotating shaft rotatably passes through the pipe wall of the three-way connecting pipe, The baffle is located inside the three-way connecting pipe, one end of the baffle is fixed on the rotating shaft and flips between the B hole and the C hole with the rotation of the rotating shaft, and the positioning plate is fixed on the rotating shaft and is located outside the three-way connecting pipe. The positioning plate is provided with a travel groove, and also includes a pressing bolt which passes through the travel groove and presses the positioning plate on the pipe wall of the tee connecting pipe.

In another aspect of the present invention, a water supply valve with an outlet located in the saw cover is also fixed on the saw cover, the water supply valve is connected with a water supply pipe, and the water supply pipe is connected with a water tank.

In another aspect of the present invention, a guide device is further included, the guide device includes a guide rod, a guide wheel is rotatably fixed at the front end of the guide rod, and the center section of the guide wheel perpendicular to the axial direction of the guide wheel is the same as the guide wheel. The central section of the cutting saw blade perpendicular to the axial direction of the cutting saw blade is on the same vertical plane; the rear end of the guide rod is vertically fixed with a rotating shaft A, and the outer end of the rotating shaft A is fixed with a gear A; it also includes a transmission box A, transmission box B, flexible casing and control rod, the transmission box A is fixed at the front of the cutting machine body, the transmission box A is provided with a slideway A, and the slideway A is equipped with a rack A that can slide back and forth , the gear A is located in the transmission box A, the rack A is meshed with the gear A, the lower end of the control rod is vertically fixed with a rotating shaft B, the outer end of the rotating shaft B is fixed with a gear B, and the gear B is located in the transmission In the box B, the transmission box B is fixed at the rear of the cutting machine body, the transmission box B is provided with a slideway B, and the slideway B is slidably assembled with a rack B, the rack B and the gear B meshing, a push-pull cable is connected between the rack A and the rack B, the flexible sleeve is connected between the slideway A and the slideway B, and the push-pull cable is slidably passed through the flexible sleeve.

The beneficial effects of the present invention are: compared with the traditional layout in which the filter element is arranged on the side of the fan impeller close to the cutting saw blade, the filter element of this dust-collecting road cutting machine is arranged on the side of the fan impeller away from the cutting saw blade, The space occupied between the fan impeller and the cutting saw blade is reduced, and the space on the side of the fan impeller away from the cutting saw blade is more abundant, which makes the structure of the whole machine more compact; the filter element is more convenient to replace and clean, and the dust is easy to handle; The dust outlet is located on the splashing path in the saw cover for the dust thrown out during the cutting operation of the cutting saw blade, which makes the dust suction more thorough and the dust suction effect is better; the fan impeller and the cutting saw blade share a set of driving device , so that the overall structure can be more compact; easy to use; good dust removal effect, strong practicability; in one aspect of the present invention, the user can adjust the cutting depth by controlling the electric push cylinder, which is more convenient; in one aspect of the present invention , the cooperation of the knock rod, the filter element holder and the filter element makes the cleaning of the filter element more convenient; in one aspect of the present invention, it is convenient to switch between the dry vacuum cutting method and the wet cutting method; The rod can be easily raised and lowered.

Description of drawings:

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention.

FIG. 2 is a schematic side view of the internal structure of the embodiment of the present invention.

FIG. 3 is a schematic diagram of the internal structure of the front part of the embodiment of the present invention.

FIG. 4 is a schematic diagram of the internal structure of the saw cover according to the embodiment of the present invention.

FIG. 5 is a schematic structural diagram of a connecting rod according to an embodiment of the present invention.

FIG. 6 is a schematic diagram of the transmission structure at the guide rod according to the embodiment of the present invention.

FIG. 7 is a partial enlarged schematic view of the transmission case A in FIG. 6 .

FIG. 8 is a schematic diagram of an installation structure of a control rod in an embodiment of the present invention.

In the attached drawings: 1, handrail, 2, rocker, 3, lower box, 4, box buckle, 5, base, 6, water supply pipe, 7, water pipe ball valve, 8, fan cover, 9, saw cover, 10, Air exhaust hole, 11, filter element, 12, air outlet channel, 13, air inlet channel, 14, cutting saw blade, 15, fan impeller, 16, belt, 17, lifting frame, 18, electric push cylinder, 19, fixing frame , 20, shield, 21, chute, 22, three-way connecting pipe, 23, A hole, 24, positioning plate, 25, stroke groove, 26, knock rod, 27, connecting rod, 28, guide rod, 29, Guide wheel, 30, transmission box A, 31, flexible sleeve, 32, transmission box B, 33, gear A, 34, rack A, 35, push-pull cable, 36, control rod.

Detailed ways:

Embodiments of the present invention will be further described below in conjunction with the accompanying drawings and examples:

In the description of the present invention, it should be understood that the description indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated A device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the scope of protection of the present invention.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "arranged", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example 1

A dust-collecting road cutting machine includes a frame, a cutting saw blade 14 and a driving device for driving the cutting saw blade 14 to rotate. In this embodiment, the driving shaft is an engine, and also includes a fan impeller 15 and a filter box. The fan impeller 15 rotates under the drive of the driving device, the fan impeller 15 is covered with a fan cover 8, the frame includes a base 5, the base 5 is located at the lower part of the frame, and a side plate is welded and fixed on one side of the base 5. The cover 8 is fixed on the side plate by bolts or welding, a preset number of filter elements 11 are installed in the filter box, and the filter element 11 is an air filter, and the filter box has a one-to-one correspondence with the outlet of the filter element 11 and is connected to each other. There is an exhaust hole 10, the cutting saw blade 14 is covered with a saw cover 9, the saw cover 9 is fixed on the side end of the base 5 by bolts or welding, and the saw cover 9 is provided with a dust outlet, the dust outlet The opening is located on the splashing path of the dust thrown out by the cutting saw blade 14 during the cutting operation in the saw cover 9. An air inlet channel 13 is communicated between the suction side of the fan cover 8 and the dust outlet, and the air inlet The channel 13 adopts a rubber hose, and an air outlet channel 12 is communicated between the exhaust side of the fan cover 8 and the filter box. The filter box includes an upper box for installing the filter element 11 and a lower box 3 for collecting dust, and the lower box 3 is detachably connected to the lower end of the upper box. A sealing member is provided between the upper box body and the lower box body 3, and the sealing member can be a sealing sponge. In this embodiment, the upper box body is a part of the frame, the two ends of the lower box body 3 are respectively fixed with box buckles 4 by bolts, and the lower box body 3 is quickly and conveniently fixed to the upper box body through the box buckles 4 lower end. It also includes a filter element fixing frame fixed in the upper box. The filter element 11 is fixed in the upper box through the filter element fixing frame. In this embodiment, the filter element fixing frame includes a support plate and a preset number of screws, and the support plate is supported on the filter element 11. At the lower end, the screw fixes the support plate and the filter element 11 on the support plate under the top plate of the upper box body, the screw rod passes through the through hole in the middle of the filter element 11, and a seal can be provided between the upper end of the filter element 11 and the top plate of the upper box body. It also includes a knocking mechanism, the knocking mechanism includes a connecting rod 27 rotatably passing through the wall of the upper box, the connecting rod 27 is fixed with a knocking rod 26 and a rocker 2, and the knocking rod 26 is located on the upper Inside the box, the rocker 2 is located outside the upper box, and the knock rod 26 is knocked on the filter element holder along with the rotation of the connecting rod 27 . When the knock rod 26 is knocked on the filter element holder, the vibration of the filter element holder is transmitted to the filter element 11 , and then the dust on the filter element 11 is shaken and dropped into the lower case 3 . The driving device includes an output shaft, on which a main pulley is fixedly installed, and the fan impeller 15 is fixed on the outside of the main pulley by bolts; it also includes a transmission shaft rotatably fixed on the frame, the The drive shaft is fixed on the base 5 through a deep groove ball bearing, the cutting saw blade 14 is installed and fixed on the drive shaft through a key connection, and a slave pulley is also fixed on the drive shaft, between the main pulley and the slave pulley. Driven by belt 16 . It also includes an electric push cylinder fixing frame 19, a lift frame 17 and an electric push cylinder 18. The electric push cylinder fixing frame 19 is welded or fixed to the top of the front of the base 5 on the frame by means of bolts. The end is hinged on the lower side of the base 5, the electric push cylinder fixing frame 19 and the front end of the lifting frame 17 are connected by the electric push cylinder 18, the push rod of the electric push cylinder 18 is hinged with the front end of the lifting frame 17, and the electric push The cylinder barrel of the cylinder 18 is hinged on the electric push cylinder fixing frame 19, the rear part of the base 5 and the front part of the lifting frame 17 are respectively provided with a preset number of bottom wheels, and the cutting saw is controlled by adjusting the push rod length of the electric push cylinder 18 Depth of cut for sheet 14. The lower opening of the saw cover 9 is also provided with a blocking cover 20, the blocking cover 20 can move up and down and hang down on one or more sides of the lower opening of the saw cover, and the lower end of the blocking cover 20 is lower than the saw cover 20. cover. The cover 20 includes cover plates arranged on both sides of the saw cover. The cover plate can be made of wear-resistant nylon. The cover plate is provided with a preset number of chutes 21, and the sliding grooves 21 pass through the cover. The plate is buckled on the limit bolt on the saw cover. The chute 21 is slidably hung up and down on the screw rod of the limit bolt. The saw cover also includes a three-way connecting pipe 22. The three-way connecting pipe 22 includes The A hole 23 connected with the air inlet channel, the B hole connected with the dust outlet, and the C hole communicated with the outside atmosphere, the three-way connecting pipe is installed with an air duct valve that switches between the B hole and the C hole. The air duct valve includes a rotating shaft, a baffle plate and a positioning plate 24. The rotating shaft rotatably passes through the pipe wall of the three-way connecting pipe, the baffle is located inside the three-way connecting pipe, and one end of the baffle is welded and fixed to the rotating shaft. The positioning plate 24 is welded and fixed on the rotating shaft and is located outside the three-way connecting pipe. The positioning plate 24 is provided with an arc-shaped travel groove 25. It also includes a pressing bolt which passes through the stroke groove 25 and presses the positioning plate on the pipe wall of the tee connecting pipe. When the positioning plate is turned over, the travel groove 25 moves around the pressing bolt. When the positioning plate is turned over to a proper position, the pressing bolt is tightened, even if the baffle plate is fixed at a specific position. The saw cover is also fixed with a water supply valve 7 whose outlet is located in the saw cover 9. The handle of the water supply valve 7 is located outside the saw cover 9 for easy operation. The water supply valve is connected with a water supply pipe 6, and the water supply pipe 6 is connected to There is a water tank, the water tank is fixed on the frame by bolts, and a drain valve is also installed at the bottom of the water tank. It also includes a guide device, the guide device includes a guide rod 28, the front end of the guide rod 28 is rotatably fixed with a guide wheel 29, and the central section of the guide wheel 29 perpendicular to the axial direction of the guide wheel 29 is connected to the cutting saw blade. The central section perpendicular to the axial direction of the cutting saw blade is on the same vertical plane, so that the operator can judge the position of the cutting saw blade according to the position of the guide wheel 29; the rear end of the guide rod 28 is fixed by welding vertically. There is a rotating shaft A, and the outer end of the rotating shaft A is welded and fixed with a gear A33; it also includes a transmission box A30, a transmission box B32, a flexible sleeve 31 and a control rod 36, and the transmission box A30 is fixed in front of the cutting machine body by bolts The transmission box A30 is provided with a slideway A, and the slideway A is slidably assembled with a rack A34, the gear A33 is located in the transmission box A30, the rack A34 meshes with the gear A33, and the control rod The lower end is vertically welded and fixed with a rotating shaft B, and the outer end of the rotating shaft B is welded and fixed with a gear B, the gear B is located in the transmission box B32, the transmission box B32 is fixed at the rear of the cutting machine body, and the transmission box B32 is equipped with There is a slideway B, the slideway B is slidably assembled with a rack B, the rack B meshes with the gear B, a push-pull cable 35 is connected between the rack A34 and the rack B, and the flexible sleeve The pipe 31 is connected between the slideway A and the slideway B, and the push-pull cable 35 is slidably passed through the flexible sleeve 31. Through this transmission structure, pushing and pulling the control rod can turn the guide rod 28 back and forth, Then, the guide wheel 29 is lifted and dropped. This transmission structure greatly facilitates the operator's control of the guide wheel 29 .

When in use, the user pushes the device by pushing the handrail 1, and when cutting the road surface, the A hole 23 and the B hole are in a state of communication, and the C hole is blocked by the baffle. Push the control rod forward to make the guide wheel 29 fall to the ground, the user starts the engine, drives the main pulley on the output shaft to rotate, transmits the power to the slave pulley through the belt 16, and the slave pulley drives the cutting saw blade 14 to rotate to carry out ground cutting. For cutting, after the cutting saw blade 14 starts to operate, the user controls the electric push cylinder 18 to expand and contract to change the cutting depth of the cutting saw blade 14. At the same time, the main pulley drives the fan impeller 15 to rotate, and the fan impeller 15 and the fan cover 8 form a centrifugal fan. The dust generated during cutting is absorbed through the air inlet channel 13. Since the dust outlet on the saw cover is located on the throwing path of the dust thrown out during the cutting operation of the cutting saw blade in the saw cover, the dust can be more It is easily and fully sucked into the air inlet channel 13, and the absorbed dust enters the fan cover 8, and the dust waste is transported into the filter box by the centrifugal action of the fan impeller 15, the gas is filtered through the filter element 11, and the filtered gas passes through the exhaust. Air vents. It also includes a control panel, the control panel is provided with control buttons of the electric push cylinder 18, and the cutting depth of the cutting saw blade 14 is adjusted by electrically adjusting the push rod length of the electric push cylinder 18. By swinging the rocker 2 back and forth, the knock rod 26 is knocked on the filter element holder with the rotation of the rocker 2, the vibration of the filter element holder is transmitted to the filter element 11, and the dust on the filter element 11 is shaken down to the lower case. 3 in. To clean the dust in the lower box body 3, the lower box body 3 can be removed by unfastening the box buckle 4, which is convenient and fast. Due to the provision of a water tank, a water supply pipe 6 and a water supply valve 7, this vacuum type road cutting machine can also perform wet cutting. When it is necessary to switch from dry vacuum cutting to wet cutting, turn the positioning plate so that the baffle blocks the B hole, thereby preventing the fan from sucking water into the filter box, and avoiding the accumulation of mud in the lower box, which makes it difficult to clean and avoid water. , The mud damages the filter element. At this time, the A hole and the C hole are connected. This structure enables the external atmosphere to communicate with the fan impeller 15 to keep the air path unobstructed, thereby preventing the fan impeller 15 from idling in the closed space and causing the cutting machine to move. When the protection function is reached, there is no need to additionally provide a structure for stopping the fan impeller 15 .

The traditional dust collection structure often sets the filter element on the air inlet side of the fan, and arranging the filter element on the air inlet side of the fan often causes the filter element and the installation structure of the filter element to occupy a large space between the driving device and the cutting saw blade. , which makes the whole machine bulky and not compact, and the dust-absorbing road cutting machine of the present invention sets the filter element 11 at the end of the air outlet air path of the fan impeller 15, thereby reducing the gap between the driving device and the cutting saw blade ( The space occupied between the fan impeller and the cutting saw blade) makes the structure of the whole machine more compact and more reasonable. In addition, this installation structure also greatly facilitates the cleaning and replacement of the filter element and the disposal of impurities and dust. The fan impeller 15 and the cutting saw blade 14 share the same set of driving devices, which further makes the overall mechanism relatively compact. The lower box body 3 is detachably arranged below the filter element 11, which greatly facilitates the collection and disposal of dust and impurities. The cooperation between the shield 20 and the saw cover enables a relatively closed space to be formed on the periphery of the cutting saw blade 14 during the cutting operation, thereby facilitating the inhalation of dust.

In a word, the above are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the patent of the present invention.

Claims (12)

1. A dust-absorption type road surface cutting machine comprises a frame, a cutting saw blade (14) and a driving device for driving the cutting saw blade (14) to rotate, is characterized by also comprising a fan impeller (15) and a filter box, wherein the fan impeller (15) is driven by a driving device to rotate, the fan cover (8) is covered outside the fan impeller (15), a preset number of filter elements (11) are arranged in the filter box, the filter box is provided with an air exhaust hole (10) communicated with the outlet of the filter element, the cutting saw blade (14) is covered with a saw cover (9), the saw cover (9) is provided with a dust outlet which is positioned on a splashing path of splashed dust in the saw cover (9) when the cutting saw blade (14) performs cutting operation, an air inlet channel (13) is communicated between the air suction side of the fan cover (8) and the dust outlet, an air outlet channel (12) is communicated between the air exhaust side of the fan cover (8) and the filter box.

2. A dust-suction type road cutting machine according to claim 1, characterized in that the filter box comprises an upper box body for mounting the filter element (11) and a lower box body (3) for collecting dust, the lower box body (3) is detachably butted at the lower end of the upper box body, and a sealing member is arranged between the upper box body and the lower box body (3).

3. The dust-suction type road surface cutting machine according to claim 2, characterized in that box buckles (4) are respectively fixed at two ends of the lower box body (3), and the lower box body (3) is fixed at the lower end of the upper box body through the box buckles (4).

4. The dust-absorption type pavement cutting machine according to claim 2 or 3, further comprising a filter element fixing frame fixed in the upper box body, wherein the filter element (11) is fixed in the upper box body through the filter element fixing frame; the filter element fixing frame is characterized by further comprising a material knocking mechanism, the material knocking mechanism comprises a connecting rod (27) which penetrates through the wall of the upper box body in a rotating mode, a knocking rod (26) and a rocker (2) are fixed on the connecting rod (27), the knocking rod (26) is located in the upper box body, the rocker (2) is located outside the upper box body, and the knocking rod knocks on the filter element fixing frame along with the rotation of the connecting rod (27).

5. A dust-collecting pavement cutter according to any one of claims 1 to 3, wherein the drive unit includes an output shaft to which a primary pulley is fixed, the fan wheel (15) being fixed outside the primary pulley; the cutting saw blade is characterized by further comprising a transmission shaft which is rotatably fixed on the rack, the cutting saw blade (14) is fixed on the transmission shaft, a driven belt wheel is further fixed on the transmission shaft, and the driving belt wheel and the driven belt wheel are in transmission through a belt (16).

6. The dust absorption type pavement cutting machine according to any one of claims 1 to 3, wherein the machine frame comprises a base (5), an electric pushing cylinder fixing frame (19), a lifting frame (17) and an electric pushing cylinder (18), the electric pushing cylinder fixing frame (19) is fixed above the front part of the base (5), the rear end of the lifting frame (17) is hinged to the lower side of the base (5), the electric pushing cylinder fixing frame (19) is connected with the front end of the lifting frame (17) through the electric pushing cylinder (18), and a preset number of bottom wheels are respectively arranged at the rear part of the base (5) and the front part of the lifting frame (17).

7. A dust-collecting pavement cutter according to any one of claims 1-3, characterized in that the saw cover (9) is provided with a shield at its lower opening, which shield can be dropped on one or more sides of the saw cover lower opening in a manner of moving up and down, and the lower end of which shield is lower than the saw cover.

8. The dust-absorbing road surface cutting machine according to claim 7, wherein the shield cover comprises cover plates arranged on two sides of the saw cover, a preset number of sliding grooves are formed in the cover plates, limiting bolts for buckling the cover plates on the saw cover penetrate through the sliding grooves, and the sliding grooves are hung on screws of the limiting bolts in an up-and-down sliding mode.

9. The dust-absorption type pavement cutting machine according to claim 1, 2, 3, 7 or 8, wherein the saw cover further comprises a three-way connecting pipe, the three-way connecting pipe comprises a hole A connected with the air inlet channel, a hole B connected with the dust outlet and a hole C communicated with the outside atmosphere, and an air duct valve for switching between the hole B and the hole C is mounted on the three-way connecting pipe.

10. The dust suction type road surface cutting machine according to claim 9, wherein the air duct valve comprises a rotating shaft, a baffle plate and a positioning plate, the rotating shaft rotatably penetrates through the pipe wall of the three-way connecting pipe, the baffle plate is located inside the three-way connecting pipe, one end of the baffle plate is fixed on the rotating shaft and overturns between the hole B and the hole C along with the rotation of the rotating shaft, the positioning plate is fixed on the rotating shaft and located outside the three-way connecting pipe, a stroke groove is formed in the positioning plate, and the dust suction type road surface cutting machine further comprises a pressing bolt which penetrates through the stroke groove and presses the positioning plate against the pipe wall.

11. A road cutting machine according to claim 7, 8 or 10, characterized in that a water supply valve (7) with an outlet in the saw cover (9) is fixed on the saw cover, the water supply valve is connected with a water supply pipe (6), and the water supply pipe (6) is connected with a water tank.

12. A dust-suction type pavement cutting machine according to any one of claims 1 to 3, further comprising a guide device, wherein the guide device comprises a guide rod, a guide wheel (29) is rotatably fixed at the front end of the guide rod, and the central section of the guide wheel (29) perpendicular to the axial direction of the guide wheel (29) is on the same vertical plane as the central section of the cutting saw blade perpendicular to the axial direction of the cutting saw blade; the rear end of the guide rod is vertically fixed with a rotating shaft A, the outer end of the rotating shaft A is fixed with a gear A (33), the cutting machine further comprises a transmission box A (30), a transmission box B (32), a flexible sleeve (31) and a control rod, the transmission box A (30) is fixed at the front part of the cutting machine body, a slide track A is arranged in the transmission box A (30), a rack A (34) is assembled in the slide track A in a front-back sliding mode, the gear A (33) is positioned in the transmission box A (30), the rack A (34) is meshed with the gear A (33), the lower end of the control rod is vertically fixed with a rotating shaft B, the outer end of the rotating shaft B is fixed with a gear B, the gear B is positioned in the transmission box B (32), the transmission box B (32) is fixed at the rear part of the cutting machine body, a slide track B is arranged in the transmission box B (32), a rack B is assembled in the slide track B, and a push-pull cable (35) is connected between the rack A (34) and the rack B, the flexible sleeve is connected between the slideway A and the slideway B, and the push-pull cable is slidably arranged in the flexible sleeve in a penetrating manner.

Images