A dust suction type road cutting machine

Abstract

A dust suction type pavement cutting machine relates to the technical field of pavement cutting, comprises 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 comprises a fan impeller and a filter box, the fan impeller rotates under the drive of the driving device, the fan impeller is covered with a fan cover, a preset number of filter elements are installed in the filter box, exhaust holes connected with the filter element outlets are opened on the filter box, the cutting saw blade is covered with a saw cover, a dust outlet is opened on the saw cover, the dust outlet is located on the splashing path of dust splashed by the cutting saw blade during cutting operation in the saw cover, an air inlet channel is connected between the air suction side of the fan cover and the dust outlet, and an air outlet channel is connected between the exhaust side of the fan cover and the filter box. The dust suction type pavement cutting machine has a compact structure, good dust removal effect, is easy to use and has strong practicality.

Description

Technical field:

[0001] The invention relates to the technical field of road cutting, and in particular to a dust suction type road cutting machine. Background technology:

[0002] The existing road cutting machines generate a lot of dust during use, which is not environmentally friendly. Although some machines use water to spray during the cutting process to reduce dust, it pollutes the ground and increases the work of subsequent cleaning.

[0003] In the prior art, there are road cutting machines with additional dust removal devices, but there are problems such as unreasonable overall structure, bulky and uncompact size, unsatisfactory dust removal effect, and inconvenient use. Summary of the invention:

[0004] In order to solve the above technical problems, the present invention provides a dust suction type road cutting machine with compact structure, good dust removal effect, convenient use and strong practicality.

[0005] The present invention is achieved through the following technical solutions:

[0006] A dust suction type pavement cutting machine comprises a frame, a cutting saw blade and a driving device for driving the cutting saw blade to rotate, wherein the machine is characterized in that it also comprises a fan impeller and a filter box, wherein the fan impeller rotates when driven by the driving device, the fan impeller is covered with a fan cover, a preset number of filter elements are installed in the filter box, an exhaust hole connected to the filter element outlet is provided on the filter box, the cutting saw blade is covered with a saw cover, a dust outlet is provided on the saw cover, the dust outlet is located on the splashing path of dust splashed by the cutting saw blade during cutting operation in the saw cover, an air inlet channel is connected between the suction side of the fan cover and the dust outlet, and an air outlet channel is connected between the exhaust side of the fan cover and the filter box.

[0007] In another aspect of the present invention, the filter box includes an upper box body for installing a filter element and a lower box body for collecting dust, the lower box body is detachably docked at the lower end of the upper box body, and a seal is provided between the upper box body and the lower box body.

[0008] In another aspect of the present invention, box buckles are respectively fixed to both ends of the lower box body, and the lower box body is fixed to the lower end of the upper box body through the box buckles.

[0009] In another aspect of the present invention, it also includes a filter element fixing frame fixed in the upper case body, and the filter element is fixed in the upper case body through the filter element fixing frame; it also includes a knocking mechanism, and the knocking mechanism includes a connecting rod rotatably passing through the wall of the upper case body, and a knocking rod and a rocking arm are fixed on the connecting rod, the knocking rod is located in the upper case body, and the rocking arm is located outside the upper case body, and the knocking rod knocks on the filter element fixing frame as the connecting rod rotates.

[0010] In another aspect of the present invention, the driving device includes an output shaft, a main pulley is fixed on the output shaft, and the fan impeller is fixed on the outside of the main pulley; it also includes a transmission shaft rotatably fixed on the frame, the cutting saw blade is fixed on the transmission shaft, and a slave pulley is also fixed on the transmission shaft, and the main pulley and the slave pulley are driven by a belt.

[0011] In another aspect of the present invention, the frame includes a base, an electric push cylinder fixing frame, a lifting frame and an electric push cylinder. The electric push cylinder fixing frame is fixed on the upper front of the base, the rear end of the lifting frame is hinged to the lower side of the base, the electric push cylinder fixing frame is connected to the front end of the lifting frame through the electric push cylinder, and a preset number of bottom wheels are respectively installed on the rear of the base and the front of the lifting frame.

[0012] In another aspect of the present invention, a shield is further provided at the lower opening of the saw cover. The shield can be moved up and down to hang down on one or more sides of the lower opening of the saw cover, and the lower end of the shield is lower than the saw cover.

[0013] 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 grooves are opened on the cover plates, and limiting bolts for buckling the cover plates on the saw cover pass through the sliding grooves, and the sliding grooves can be slidably hung on the screw rods of the limiting bolts up and down.

[0014] In another aspect of the present invention, the saw cover also includes a three-way connecting pipe, which includes a hole A connected to the air inlet channel, a hole B connected to the dust outlet, and a hole C connected to the external atmosphere, and an air duct valve switching between the hole B and the hole C is installed on the three-way connecting pipe.

[0015] In another aspect of the present invention, the saw cover also includes a three-way connecting pipe, the air duct valve includes a rotating shaft, a baffle and a positioning plate, the rotating shaft can rotatably pass through the tube 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 as the rotating shaft rotates, 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 clamping bolt that passes through the travel groove and presses the positioning plate against the tube wall of the three-way connecting pipe.

[0016] 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 to a water supply pipe, and the water supply pipe is connected to a water tank.

[0017] In another aspect of the present invention, it also includes a guiding device, which includes a guiding rod, a guiding wheel is rotatably fixed to the front end of the guiding rod, and the central section of the guiding wheel perpendicular to the axial direction of the guiding wheel and the central section of the cutting saw blade perpendicular to the axial direction of the cutting saw blade are in the same vertical plane; a rotating shaft A is vertically fixed to the rear end of the guiding rod, and a gear A is fixed to the outer end of the rotating shaft A; it also includes a transmission box A, a transmission box B, a flexible sleeve and a control rod, the transmission box A is fixed to the front part of the cutting machine body, and a slideway A is provided in the transmission box A, and the slideway A can move forward and backward A rack A is slidably mounted, and the gear A is located in a transmission box A. The rack A meshes with the gear A. A rotating shaft B is vertically fixed to the lower end of the control lever, and a gear B is fixed to the outer end of the rotating shaft B. The gear B is located in a transmission box B, and the transmission box B is fixed to the rear part of the cutting machine body. A slideway B is provided in the transmission box B, and a rack B is slidably mounted in the slideway B. The rack B meshes with the gear B. A push-pull cable is connected between the rack A and the rack B, and the flexible sleeve is connected between the slideway A and the slideway B. The push-pull cable can be slidably passed through the flexible sleeve.

[0018] The beneficial effects of the present invention are as follows: 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 suction type road cutting machine is arranged on the side of the fan impeller away from the cutting saw blade, thereby reducing the space occupied between the fan impeller and the cutting saw blade, and the space on the side of the fan impeller away from the cutting saw blade is relatively abundant, so that the structure of the whole machine can be more compact; the filter element is more convenient to replace and clean, and the dust is easy to handle; the dust outlet on the saw cover is located on the splashing path of the dust splashed by the cutting saw blade during the cutting operation, so that the dust suction is more convenient The invention is thorough and has a better dust collection effect; the fan impeller and the cutting saw blade share a set of driving devices, so that the overall structure can be more compact; it is easy to use; the dust removal effect is good and the practicability is strong; in one aspect of the invention, the user can adjust the cutting depth by controlling the electric push cylinder, which is more convenient; in one aspect of the invention, the cooperation of the knocking rod, the filter element fixing frame and the filter element makes the cleaning of the filter element more convenient; in one aspect of the invention, it is convenient to switch between the dry dust collection cutting mode and the wet cutting mode; in one aspect of the invention, the guide rod can be easily raised and lowered. Description of the drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0020] Figure 2 It is a schematic side view of the internal structure of an embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of the front internal structure of an embodiment of the present invention.

[0022] Figure 4Schematic diagram of the internal structure of the saw cover according to an embodiment of the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of the connecting rod according to an embodiment of the present invention.

[0024] Figure 6 It is a schematic diagram of the transmission structure at the guide rod according to an embodiment of the present invention.

[0025] Figure 7 for Figure 6 A partial enlarged schematic diagram of the middle transmission box A.

[0026] Figure 8 Schematic diagram of the control rod installation structure in an embodiment of the present invention.

[0027] In the attached drawings: 1. armrest, 2. rocker, 3. lower box, 4. box buckle, 5. base, 6. water supply pipe, 7. water supply valve, 8. fan cover, 9. saw cover, 10. 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. electric push cylinder fixing frame, 20. baffle cover, 21. slide groove, 22. three-way connecting pipe, 23. A hole, 24. positioning plate, 25. travel 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 lever. Specific implementation method:

[0028] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings and embodiments:

[0029] In the description of the present invention, it is necessary to understand that the description indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Example 1

[0032] A dust suction type road cutting machine, comprising 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 comprises 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 comprises a base 5, the base 5 is located at the lower part of the frame, and a side plate is welded and fixed to one side of the base 5. The fan cover 8 is fixed to 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 empty. Air filter, the filter box is provided with exhaust holes 10 corresponding to and connected with the outlet of the filter element 11, the cutting saw blade 14 is covered with a saw cover 9, the saw cover 9 is fixed to the side end of the base 5 by bolts or welding, the saw cover 9 is provided with a dust outlet, the dust outlet is located on the splattering path of the dust chips splashed by the cutting saw blade 14 during the cutting operation in the saw cover 9, an air inlet channel 13 is connected 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 connected between the exhaust side of the fan cover 8 and the filter box. The filter box includes an upper box body for installing the filter element 11 and a lower box body 3 for collecting dust, the lower box body 3 is detachably docked at the lower end of the upper box body. A sealing member is provided between the upper box body and the lower box body 3, and the sealing member can adopt a sealing sponge. In this embodiment, the upper box body is a part of the frame, and 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 lower end of the upper box body by the box buckles 4. It also includes a filter element fixing frame fixed in the upper box body, and the filter element 11 is fixed in the upper box body through the filter element fixing frame. In this embodiment, the filter element fixing frame includes a support plate and a preset number of screws. The support plate is supported at the lower end of the filter element 11, and the screws fix the support plate and the filter element 11 on the support plate below the top plate of the upper box body. The screw 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, which includes a connecting rod 27 that rotatably passes through the wall of the upper box body, and a knocking rod 26 and a rocker 2 are fixed to the connecting rod 27. The knocking rod 26 is located in the upper box body, and the rocker 2 is located outside the upper box body. The knocking rod 26 knocks on the filter element fixing frame as the connecting rod 27 rotates. When the knock rod 26 hits 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 off into the lower box body 3. The driving device includes an output shaft, on which a main pulley is fixedly mounted, and the fan impeller 15 is fixed to the outside of the main pulley by bolts; it also includes a transmission shaft rotatably fixed to the frame, the transmission shaft is fixed to the base 5 by a deep groove ball bearing, the cutting saw blade 14 is fixed to the transmission shaft by a key connection, and a slave pulley is also fixed to the transmission shaft, and the main pulley and the slave pulley are driven by a belt 16.It also includes an electric push cylinder fixing frame 19, a lifting frame 17 and an electric push cylinder 18. The electric push cylinder fixing frame 19 is welded or fixed by bolts to the upper part of the front of the base 5 on the frame. The rear end of the lifting frame 17 is hinged to the lower side of the base 5. The electric push cylinder fixing frame 19 is connected to the front end of the lifting frame 17 through the electric push cylinder 18. The push rod of the electric push cylinder 18 is hinged to the front end of the lifting frame 17. The cylinder barrel of the electric push cylinder 18 is hinged to the electric push cylinder fixing frame 19. A preset number of bottom wheels are respectively installed at the rear of the base 5 and the front of the lifting frame 17. The cutting depth of the cutting saw blade 14 is controlled by adjusting the push rod length of the electric push cylinder 18. A baffle 20 is also provided at the lower opening of the saw cover 9. The baffle 20 can be moved up and down to hang on one or more sides of the lower opening of the saw cover. The lower end of the baffle 20 is lower than the saw cover. The baffle 20 includes cover plates arranged on both sides of the saw cover. The cover plates can be made of wear-resistant nylon material. A preset number of slide grooves 21 are opened on the cover plate. Limit bolts that buckle the cover plates on the saw cover pass through the slide grooves 21. The slide grooves 21 can be slidably hung on the screws of the limit bolts up and down. The saw cover also includes a three-way connecting pipe 22. The three-way connecting pipe 22 includes an A hole 23 connected to the air inlet channel, a B hole connected to the dust outlet, and a C hole connected to the external atmosphere. An air duct valve that switches between the B hole and the C hole is installed on the three-way connecting pipe. The air duct valve includes a rotating shaft, a baffle and a positioning plate 24. The rotating shaft can rotate through the wall of the three-way connecting pipe. The baffle is located inside the three-way connecting pipe. One end of the baffle is welded and fixed on the rotating shaft and flips between the B hole and the C hole as the rotating shaft rotates. 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 has an arc-shaped stroke groove 25, and also includes a clamping bolt that passes through the stroke groove 25 and presses the positioning plate on the wall of the three-way connecting pipe. When the positioning plate is flipped, the stroke groove 25 moves around the clamping bolt. When it is flipped to a suitable position, the clamping bolt is tightened to fix the baffle 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 to a water supply pipe 6, and the water supply pipe 6 is connected to a water tank. The water tank is fixed to the frame by bolts, and a drain valve is also installed at the bottom of the water tank.It also includes a guide device, which includes a guide rod 28, a guide wheel 29 is rotatably fixed to the front end of the guide rod 28, a central section of the guide wheel 29 perpendicular to the axial direction of the guide wheel 29 and a central section of the cutting saw blade perpendicular to the axial direction of the cutting saw blade are in 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; a rotating shaft A is vertically welded and fixed to the rear end of the guide rod 28, and a gear A33 is welded and fixed to the outer end of the rotating shaft A; it also includes a transmission box A30, a transmission box B32, a flexible sleeve 31 and a control rod 36, the transmission box A30 is fixed to the front part of the cutting machine body by bolts, a slideway A is provided in the transmission box A30, a rack A34 is slidably installed in the slideway A, and the gear A33 is located at the transmission box. In the gear box A30, the rack A34 is meshed with the gear A33, and the lower end of the control rod is vertically welded with a rotating shaft B, and the outer end of the rotating shaft B is welded with a gear B, and the gear B is located in the transmission box B32, and the transmission box B32 is fixed to the rear part of the cutting machine body. A slideway B is provided in the transmission box B32, and a rack B is slidably mounted in the slideway B, and the rack B is meshed with the gear B. A push-pull cable 35 is connected between the rack A34 and the rack B, and the flexible sleeve 31 is connected between the slideway A and the slideway B. The push-pull cable 35 can be slidably passed through the flexible sleeve 31. Through this transmission structure, pushing and pulling the control rod can make the guide rod 28 flip forward and backward, and then lift and fall the guide wheel 29. This transmission structure greatly facilitates the operator's control of the guide wheel 29.

[0033] When in use, the user pushes the handrail 1 to push the device, and when cutting the road surface, the A hole 23 and the B hole are in a communicating state, and the C hole is blocked by the baffle. Push the control lever 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 power to the slave pulley through the belt 16, and the slave pulley drives the cutting saw blade 14 to rotate and then cuts the ground. After the cutting saw blade 14 starts to run, the user controls the electric push cylinder 18 to extend and retract 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, which absorbs the dust generated during cutting through the air inlet channel 13. Since the dust outlet on the saw cover is located on the splashing path of the dust splashed by the cutting saw blade during cutting operation in the saw cover, the dust can be more easily and fully sucked into the air inlet channel 13, and the absorbed dust enters the fan cover 8. The dust waste is transported to the filter box through the centrifugal action of the fan impeller 15, and the gas is filtered through the filter element 11, and the filtered gas is discharged through the exhaust hole. It also includes a control panel, on which the control button of the electric push cylinder 18 is installed. 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 knocking rod 26 hits the filter element fixing frame as the rocker 2 rotates, and the vibration of the filter element fixing frame is transmitted to the filter element 11, thereby shaking the dust on the filter element 11 into the lower box body 3. Cleaning the dust in the lower box body 3 can be conveniently and quickly dismantling the lower box body 3 by unfastening the box buckle 4. Due to the provision of a water tank, a water supply pipe 6 and a water supply valve 7, this vacuum road cutting machine can also perform wet cutting. When it is necessary to switch from the dry vacuum cutting mode to the wet cutting mode, the positioning plate is rotated so that the baffle blocks the B hole, thereby preventing the fan from sucking water into the filter box, preventing mud from accumulating in the lower box body, making it difficult to clean, and preventing water and mud from damaging the filter element. At this time, the A hole is connected to the C hole. This structure allows the external atmosphere to be connected to the fan impeller 15, keeping the wind path unobstructed, thereby preventing the fan impeller 15 from idling in a closed space, protecting the cutting machine, and eliminating the need to set up an additional structure to stop the fan impeller 15.

[0034] Traditional dust suction structures often set the filter element on the air inlet side of the fan, and setting 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 drive device and the cutting saw blade, thereby making the whole machine bulky and not compact. The dust suction type road cutting machine of the present invention sets the filter element 11 at the end of the air outlet path of the fan impeller 15, thereby reducing the space occupied between the drive device and the cutting saw blade (between the fan impeller and the cutting saw blade), making the whole machine structure more compact and more reasonable. In addition, this installation structure also greatly facilitates the cleaning and replacement of the filter element and the handling of impurities and dust. The fan impeller 15 and the cutting saw blade 14 share the same set of driving devices, further making the overall structure relatively compact. The lower box 3 is detachably arranged below the filter element 11, which greatly facilitates the collection and handling of dust and impurities. The cooperation between the shield 20 and the saw cover enables a relatively closed space to be formed around the cutting saw blade 14 during the cutting operation, thereby facilitating the suction of dust.

[0035] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the patent of the present invention.

Claims

1. A dust suction type road cutting machine, comprising a frame, a cutting saw blade (14) and a driving device for driving the cutting saw blade (14) to rotate, characterized in that: It also includes a fan impeller (15) and a filter box, wherein the fan impeller (15) rotates under the drive of the driving device, the fan impeller (15) is covered with a fan cover (8), a preset number of filter elements (11) are installed in the filter box, an exhaust hole (10) connected to the filter element outlet is opened on the filter box, the cutting saw blade (14) is covered with a saw cover (9), a dust outlet is opened on the saw cover (9), the dust outlet is located on the splashing path of dust chips splashed by the cutting saw blade (14) during cutting operation in the saw cover (9), an air inlet channel (13) is connected between the air suction side of the fan cover (8) and the dust outlet, and an air outlet channel (12) is connected between the air exhaust side of the fan cover (8) and the filter box; The machine tool also includes a guide device, wherein the guide device includes a guide rod, a guide wheel (29) is rotatably fixed to the front end of the guide rod, and a central section of the guide wheel (29) perpendicular to the axial direction of the guide wheel (29) and a central section of the cutting saw blade perpendicular to the axial direction of the cutting saw blade are located on the same vertical plane; a rotating shaft A is vertically fixed to the rear end of the guide rod, and a gear A (33) is fixed to the outer end of the rotating shaft A; the machine tool also includes a transmission box A (30), a transmission box B (32), a flexible sleeve (31) and a control rod, wherein the transmission box A (30) is fixed to the front part of the cutting machine body, a slideway A is arranged in the transmission box A (30), and a rack is arranged in the slideway A so as to slide back and forth A (34), the gear A (33) is located in a transmission box A (30), the rack A (34) is meshed with the gear A (33), a rotating shaft B is vertically fixed to the lower end of the control rod, a gear B is fixed to the outer end of the rotating shaft B, the gear B is located in a transmission box B (32), the transmission box B (32) is fixed to the rear part of the cutting machine body, a slideway B is arranged in the transmission box B (32), a rack B is slidably mounted in the slideway B, the rack B is meshed with the gear B, 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 can be slidably passed through the flexible sleeve.

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 a filter element (11) and a lower box body (3) for collecting dust, wherein the lower box body (3) is detachably docked at the lower end of the upper box body, and a sealing member is provided between the upper box body and the lower box body (3).

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

4. A dust suction type road cutting machine according to claim 2 or 3, characterized in that: It also includes a filter element fixing frame fixed in the upper box body, and the filter element (11) is fixed in the upper box body through the filter element fixing frame; it also includes a knocking mechanism, and the knocking mechanism includes a connecting rod (27) rotatably passing through the box wall of the upper box body, and a knocking rod (26) and a rocking rod (2) are fixed on the connecting rod (27), the knocking rod (26) is located in the upper box body, and the rocking rod (2) is located outside the upper box body, and the knocking rod knocks on the filter element fixing frame as the connecting rod (27) rotates.

5. A dust suction type road cutting machine according to any one of claims 1 to 3, characterized in that: The driving device comprises an output shaft, a main pulley is fixed on the output shaft, and the fan impeller (15) is fixed on the outside of the main pulley; it also comprises a transmission shaft rotatably fixed on the frame, the cutting saw blade (14) is fixed on the transmission shaft, and a slave pulley is also fixed on the transmission shaft, and the main pulley and the slave pulley are driven by a belt (16).

6. A dust suction type road cutting machine according to any one of claims 1 to 3, characterized in that: The frame comprises a base (5), an electric push cylinder fixing frame (19), a lifting frame (17) and an electric push cylinder (18); the electric push cylinder fixing frame (19) is fixed to the upper 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 push cylinder fixing frame (19) and the front end of the lifting frame (17) are connected via the electric push cylinder (18); and a preset number of bottom wheels are respectively arranged at the rear of the base (5) and the front of the lifting frame (17).

7. A dust suction type road cutting machine according to any one of claims 1 to 3, characterized in that: The lower opening of the saw cover (9) is also provided with a blocking cover, which can be moved 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 is lower than the saw cover.

8. The dust suction type road cutting machine according to claim 7, characterized in that: The guard cover includes a cover plate arranged on both sides of the saw cover, a preset number of slide grooves are opened on the cover plate, and limiting bolts that buckle the cover plate on the saw cover pass through the slide grooves, and the slide grooves can be slidably hung on the screw rods of the limiting bolts up and down.

9. A dust suction type road cutting machine according to claim 1, 2, 3 or 8, characterized in that: The saw cover also includes a three-way connecting pipe, which includes an A hole connected to the air inlet channel, a B hole connected to the dust outlet, and a C hole connected to the external atmosphere. An air duct valve switching between the B hole and the C hole is installed on the three-way connecting pipe.

10. The dust suction type road cutting machine according to claim 9, characterized in that: The air duct valve includes a rotating shaft, a baffle and a positioning plate. The rotating shaft can rotatably pass through the tube 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 as the rotating shaft rotates. 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 clamping bolt that passes through the travel groove and presses the positioning plate against the tube wall of the three-way connecting pipe.

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

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