CN212357929U - Dust absorption formula road surface 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

Dust absorption formula road surface cutting machine

The technical field is as follows:

the utility model relates to a road surface cutting technical field especially relates to a dust absorption formula road surface cutting machine.

Background art:

present current road surface cutting machine produces a large amount of dusts in the use, and is not environmental protection, though some machines spray at cutting in-process water, can reduce the raise dust, but also bring the pollution to ground, increased the work of later stage clearance.

The road surface cutting machine additionally provided with the dust removal device also appears in the prior art, but has the problems of unreasonable integral structure, large and non-compact size, unsatisfactory dust removal effect, inconvenience in use and the like.

The utility model has the following contents:

in order to solve the technical problem, the utility model provides a dust absorption formula road surface cutting machine, compact structure, dust removal effect is good, convenient to use, and the practicality is strong.

The utility model discloses a realize through following technical scheme:

the dust collection type pavement cutting machine comprises a rack, a cutting saw blade, a driving device used for driving the cutting saw blade to rotate, and is characterized by further comprising a fan impeller and a filter box, wherein the fan impeller rotates under the driving of the driving device, a fan cover covers the fan impeller, a preset number of filter elements are arranged in the filter box, an air exhaust hole communicated with an outlet of each filter element is formed in the filter box, the cutting saw blade is covered with a saw cover, a dust outlet is formed in the saw cover, the dust outlet is located on a splashing path of splashed dust thrown out by the cutting saw blade in the cutting operation process in the saw cover, an air inlet channel is communicated between an air suction side of the fan cover and the dust outlet, and an air outlet channel is communicated between an 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 the dust, the lower box detachably docks at the lower end of the upper box, and a sealing member is disposed between the upper box and the lower box.

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

In another aspect of the present invention, the filter device further comprises a filter element fixing frame fixed in the upper box body, wherein the filter element is fixed in the upper box body through the filter element fixing frame; the filter element fixing frame is characterized by further comprising a knocking mechanism, the knocking mechanism comprises a connecting rod which penetrates through the wall of the upper box body in a rotatable mode, a knocking rod and a rocker are fixed on the connecting rod, the knocking rod is located in the upper box body, the rocker 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.

In another aspect of the present invention, the driving device includes an output shaft, a main belt pulley is fixed on the output shaft, and the fan wheel is fixed outside the main belt pulley; the cutting saw blade 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.

The utility model discloses an in another aspect, the frame includes base, electric cylinder fixing frame, crane and electric cylinder, the electric cylinder fixing frame is fixed in the anterior top of base, the rear end of crane articulates at the base downside, be connected through the electric cylinder between the front end of electric cylinder fixing frame and crane, the return pulley of predetermineeing quantity has been installed respectively to base rear portion and crane front portion.

In another aspect of the present invention, the saw cover lower opening is further provided with a baffle cover, the baffle cover can vertically drop on one side or multiple sides of the saw cover lower opening with moving up and down, and the lower end of the baffle cover is lower than the saw cover.

The utility model discloses an in another aspect, saw cover lower part opening department still is equipped with the fender cover, keep off the cover plate including locating saw cover both sides, it has the spout of predetermineeing quantity to open on the cover plate, has passed the spacing bolt of detaining the cover plate on saw cover in the spout, hang on spacing bolt's screw rod about the spout slidable.

In another aspect of the utility model, the saw cover still includes the tee junction pipe, the tee junction pipe includes the A hole of being connected with inlet air duct, the B hole of being connected with the dust outlet and the C hole of communicating with outside atmosphere, the last wind channel valve of installing switching between B hole and C hole of tee junction pipe.

In another aspect of the utility model, the saw cover still includes the tee junction pipe, the wind channel valve includes pivot, baffle and locating plate, the pivot is rotationally passed the pipe wall of tee junction pipe, inside the baffle was located the tee junction pipe, the one end of baffle was fixed in the pivot and was overturned between B hole and C hole along with the rotation of pivot, the locating plate is fixed in the pivot and is located the tee junction pipe outside, it has the stroke groove to open on the locating plate, still including passing the stroke groove and compressing tightly the positioning plate at the housing washer on the tee junction pipe wall.

In another aspect of the present invention, the saw cover is further fixed with a water supply valve having an outlet located inside 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, the cutting device further comprises a guiding device, the guiding device comprises a guiding rod, a guiding wheel is rotatably fixed at the front end of the guiding rod, and a central section perpendicular to the axial direction of the guiding wheel on the guiding wheel and a central section perpendicular to the axial direction of the cutting saw blade on the cutting saw blade are on the same vertical plane; 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, the cutting machine further comprises a transmission box A, a transmission box B, a flexible sleeve and a control rod, the transmission box A is fixed at the front part of the cutting machine body, a slide way A is arranged in the transmission box A, a rack A is assembled in the slide way A in a front-back sliding manner, the gear A is positioned in the transmission box A and 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, the gear B is positioned in the transmission box B, the transmission box B is fixed at the rear part of the cutting machine body, a slide way B is arranged in the transmission box B and is assembled in a front-back sliding manner, the rack B is meshed with the gear B, a push-pull cable is connected between the rack A and, the push-pull cable is slidably arranged in the flexible sleeve in a penetrating mode.

The utility model has the advantages that: compared with the traditional layout mode that the filter element is arranged on one side of the fan impeller close to the cutting saw blade, the filter element of the dust-absorption type pavement cutting machine is arranged on one side of the fan impeller far away from the cutting saw blade, so that the space occupation between the fan impeller and the cutting saw blade is reduced, and the space on one side of the fan impeller far away from the cutting saw blade is more abundant, so that the whole structure can be more compact; the filter element is convenient to replace and clean, and dust is convenient to treat; the dust outlet on the saw cover is positioned on a splashing path of splashed dust in the saw cover during cutting operation of the cutting saw blade, so that dust is more thoroughly absorbed and the dust absorption effect is better; the fan impeller and the cutting saw blade share one set of driving device, so that the whole structure can be more compact; the use is convenient; the dust removal effect is good, and the practicability is strong; in one aspect of the utility model, the user can adjust the cutting depth by controlling the electric pushing cylinder, which is more convenient; in one aspect of the utility model, the cooperation of the knock bar, the filter element fixing frame and the filter element makes the cleaning of the filter element more convenient; in one aspect of the present invention, switching between the dry dust-collecting cutting mode and the wet cutting mode is facilitated; in one aspect of the present invention, the guide bar can be conveniently lifted.

Description of the drawings:

fig. 1 is a schematic view of the overall structure of the 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 view of the front internal structure of the embodiment of the present invention.

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

Fig. 5 is a schematic view of a structure of a connecting rod according to an embodiment of the present invention.

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

Fig. 7 is a partially enlarged view of the transmission case a in fig. 6.

Fig. 8 is a schematic view of the control rod mounting structure in the embodiment of the present invention.

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

The specific implementation mode is as follows:

the following will further explain the embodiments of the present invention with reference to the 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 drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

A dust-absorption type road surface cutting machine comprises a frame, a cutting saw blade 14 and a driving device used for driving the cutting saw blade 14 to rotate, wherein a driving rotating shaft is an engine in the embodiment, the dust-absorption type road surface cutting machine further comprises a fan impeller 15 and a filter box, the fan impeller 15 rotates under the driving of the driving device, a fan cover 8 covers the fan impeller 15, the frame comprises a base 5, the base 5 is positioned at the lower portion of the frame, a side plate is welded and fixed on one side of the base 5, the fan cover 8 is fixed on the side plate through bolts or welding, a preset number of filter elements 11 are arranged in the filter box, the filter elements 11 are air filters, exhaust holes 10 which are in one-to-one correspondence with and communicated with outlets of the filter elements 11 are formed in the filter box, the cutting saw blade 14 is covered with a saw cover 9, the saw cover 9 is fixed at the side end of the base 5 through bolts or welding, a dust outlet is formed in the saw cover 9, and is positioned on a splashing path of dust splashed in, an air inlet channel 13 is communicated between the air suction side of the fan cover 8 and the dust outlet, the air inlet channel 13 adopts a rubber hose, and an air outlet channel 12 is communicated between the air exhaust side of the fan cover 8 and the filter box. The filter box comprises an upper box body used for installing the filter element 11 and a lower box body 3 used for collecting dust, and the lower box body 3 is detachably butted at the lower end of the upper box body. And a sealing element is arranged between the upper box body and the lower box body 3, and the sealing element can be sealing sponge. In this embodiment, the upper box body is a part of the rack, the two ends of the lower box body 3 are respectively fixed with the box buckles 4 through bolts, and the lower box body 3 is quickly and conveniently fixed at the lower end of the upper box body through the box buckles 4. Still including fixing the filter core mount in last box, filter core 11 passes through the filter core mount to be fixed in last box, and in this embodiment, the filter core mount includes layer board and the screw rod of predetermineeing quantity, and the layer board holds in the palm at 11 lower extremes of filter core, and the screw rod is fixed in last box roof below with filter core 11 on layer board and the layer board, and the screw rod passes from the through-hole at filter core 11 middle part, can set up the sealing member between 11 upper ends of filter core and the last box roof. The filter element fixing frame further comprises 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 rotatable 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 26 knocks on the filter element fixing frame along with the rotation of the connecting rod 27. When the knocking rod 26 knocks on the filter element fixing frame, the vibration of the filter element fixing frame is transmitted to the filter element 11, and then the dust on the filter element 11 is shaken and falls into the lower box body 3. The driving device comprises an output shaft, a main belt wheel is fixedly installed on the output shaft, and the fan impeller 15 is fixed on the outer side of the main belt wheel through a bolt; the cutting saw blade cutting machine further comprises a transmission shaft which is rotatably fixed on the machine frame, the transmission shaft is fixed on the base 5 through a deep groove ball bearing, the cutting saw blade 14 is fixedly installed on the transmission shaft through a key connection, 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. Still include electric push cylinder mount 19, crane 17 and electric push cylinder 18, the welding of electric push cylinder mount 19 or through the bolt fastening in the frame in the anterior top of base 5, crane 17's rear end articulates at base 5 downside, be connected through electric push cylinder 18 between electric push cylinder mount 19 and crane 17's the front end, electric push cylinder 18's push rod is articulated with crane 17's front end, and electric push cylinder 18's cylinder articulates on electric push cylinder mount 19, and base 5 rear portion and crane 17 front portion have installed the return pulley of predetermineeing quantity respectively, control the cutting depth of cutting saw bit 14 through adjusting electric push cylinder 18's push rod length. The lower opening of the saw cover 9 is also provided with a baffle cover 20, the baffle cover 20 can vertically move and vertically fall on one side or multiple sides of the lower opening of the saw cover, and the lower end of the baffle cover 20 is lower than the saw cover. Keep off cover 20 including locating the cover plate of saw cover both sides, the cover plate can adopt wear-resisting nylon material, it has the spout 21 of predetermineeing the quantity to open on the cover plate, has passed the spacing bolt of detaining the cover plate on saw cover in the spout 21, hang on spacing bolt's screw rod about spout 21 slidable, the saw cover still includes tee junction pipe 22, tee junction pipe 22 includes the A hole 23 of being connected with inlet air duct, the B hole of being connected with the dust outlet and the C hole that communicates with outside atmosphere, the last wind channel valve of switching between B hole and C hole of installing of tee junction pipe. The air duct valve comprises a rotating shaft, a baffle and a positioning plate 24, wherein the rotating shaft rotatably penetrates through the pipe wall of the three-way connecting pipe, the baffle is positioned inside the three-way connecting pipe, one end of the baffle is welded and fixed on the rotating shaft and overturns between a hole B and a hole C along with the rotation of the rotating shaft, the positioning plate 24 is welded and fixed on the rotating shaft and positioned outside the three-way connecting pipe, a curved stroke groove 25 is formed in the positioning plate 24, and the air duct valve further comprises a compression bolt which penetrates through the stroke groove 25 and compresses the positioning plate on the pipe wall of. When the positioning plate is turned over, the stroke groove 25 moves around the pressing bolt, and when the positioning plate is turned over to a proper position, the pressing bolt is screwed, even if the baffle is fixed at a specific position. The saw is covered and still is fixed with the delivery valve 7 that the export is located saw cover 9 on, and the handle of delivery valve 7 is located outside saw cover 9 to the operation, the delivery valve is connected with delivery pipe 6, delivery pipe 6 is connected with the water tank, the water tank passes through the bolt fastening in the frame, the water drain valve is still installed to the water tank bottom. The cutting saw further comprises a guide device, the guide device comprises a guide rod 28, a guide wheel 29 is rotatably fixed at the front end of the guide rod 28, and a central section, perpendicular to the axial direction of the guide wheel 29, of the guide wheel 29 and a central section, perpendicular to the axial direction of the cutting saw blade, of the cutting saw blade are located on the same vertical plane, so that an 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 vertically welded and fixed with a rotating shaft A, the outer end of the rotating shaft A is welded and fixed with a gear A33, the cutting machine further comprises a transmission box A30, a transmission box B32, a flexible sleeve 31 and a control rod 36, the transmission box A30 is fixed at the front part of the cutting machine body through bolts, a slide way A is arranged in the transmission box A30, a rack A34 is arranged in the slide way A in a front-back sliding mode, the gear A33 is positioned in the transmission box A30, the rack A34 is meshed with the gear A33, the lower end of the control rod is vertically welded and fixed with a rotating shaft B, the outer end of the rotating shaft B is welded and fixed with a gear B, the gear B is positioned in the transmission box B32, the transmission box B32 is fixed at the rear part of the cutting machine body, a slide way B is arranged in the transmission box B32, a rack B is arranged in the slide way B in a front-back sliding, the flexible sleeve 31 is connected between the slideway A and the slideway B, the push-pull cable 35 is slidably arranged in the flexible sleeve 31 in a penetrating way, and through the transmission structure, the control rod is pushed and pulled to enable the guide rod 28 to turn over forwards and backwards, so that the guide wheel 29 is lifted and dropped, and the transmission structure is greatly convenient for an operator to control the guide wheel 29.

When the device is used, a user pushes the handrail 1 to push the device, when a road surface is cut, the hole A23 is communicated with the hole B, and the hole C is blocked by the baffle. The control rod is pushed forward to make the guide wheel 29 fall to the ground, the user starts the engine to drive the main belt wheel on the output shaft to rotate, the power is transmitted to the secondary belt wheel through the belt 16, the secondary belt wheel drives the cutting saw blade 14 to rotate to cut the ground, after the cutting saw blade 14 starts to operate, the user controls the electric pushing cylinder 18 to stretch and retract to change the cutting depth of the cutting saw blade 14, meanwhile, the main belt wheel drives the fan impeller 15 to rotate, the fan impeller 15 and the fan cover 8 form a centrifugal fan, dust generated during cutting is absorbed through the air inlet channel 13, as the dust outlet on the saw cover is positioned on a splashing path in the saw cover when the cutting saw blade is in cutting operation, the dust can be more easily and fully sucked into the air inlet channel 13, the absorbed dust enters the fan cover 8, and dust waste is conveyed into the filter box through the centrifugal action of the fan impeller 15, the gas is filtered by the filter element 11, and the filtered gas is discharged through the exhaust hole. And the cutting machine also comprises a control panel, wherein a control button of the electric pushing cylinder 18 is arranged on the control panel, and the cutting depth of the cutting saw blade 14 is adjusted by electrically adjusting the length of a push rod of the electric pushing cylinder 18. Through swinging the rocker 2 back and forth, the knocking rod 26 knocks on the filter element fixing frame along with the rotation of the rocker 2, the vibration of the filter element fixing frame is transmitted to the filter element 11, and then dust on the filter element 11 is shaken and falls into the lower box body 3. The box body 3 can be detached by loosening the box buckle 4 to clean the dust in the lower box body 3, which is convenient and fast. The dust-suction type road surface cutting machine can also perform wet cutting due to the water tank, the water supply pipe 6, and the water supply valve 7. When the dry dust collection cutting mode needs to be switched to the wet cutting mode, the positioning plate is rotated, the baffle plate blocks the hole B, the fan is prevented from sucking water into the filter box, the lower box body is prevented from being piled up with slurry, the problem that the filter element is difficult to clean is avoided, the water and the slurry damage the filter element is avoided, the hole A is communicated with the hole C, the structure enables the external atmosphere to be communicated with the fan impeller 15, the air path is kept smooth, the fan impeller 15 is prevented from idling in a closed space, the protection effect is achieved on the cutting machine, and the structure for stopping the fan impeller 15 does not need to be additionally arranged.

Traditional dust collection structure often sets up the filter core in the air inlet side of fan, and often can make the mounting structure of filter core and filter core cause great space to occupy between drive arrangement and cutting saw bit with the filter core setting in the air inlet side of fan, and then make the complete machine bulky, not compact, and the utility model discloses this kind of dust absorption formula road surface cutting machine sets up filter core 11 at the end of 15 air-out wind paths of fan impeller, and then has reduced the space between drive arrangement and the cutting saw bit (between fan impeller and the cutting saw bit) and occupy, makes the complete machine structure compacter, and the structure is more reasonable, in addition, this kind of mounting structure has still made things convenient for the clearance and the change of filter core greatly, has made things convenient for the processing of impurity dust. The fan wheel 15 shares the same set of drive means with the cutting blade 14, further making the overall mechanism relatively compact. Lower box 3 detachably sets up in filter core 11 below, has made things convenient for the collection and the processing of dust, impurity greatly. The cooperation of the shield 20 and the saw cover enables a relatively closed space to be formed around the cutting blade 14 during the cutting operation, thereby facilitating the suction of dust.

In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope 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 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 1 or 2 or 3 or 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, a water supply pipe (6) is connected to the water supply valve, and a water tank is connected to the water supply pipe (6).

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.

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