CN112179650A

CN112179650A - Concrete cutting machine

Info

Publication number: CN112179650A
Application number: CN202010828141.8A
Authority: CN
Inventors: 陈强
Original assignee: Shanghai Hengyi Machinery Co ltd
Current assignee: Shanghai Hengyi Machinery Co ltd
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2021-01-05

Abstract

The invention discloses a concrete cutting machine, which relates to the field of cutting devices, and adopts the technical scheme that the concrete cutting machine comprises a bearing base, wherein a cutting device is arranged on the bearing base, the cutting device comprises a cutting disc, a connecting piece, a power source and a transmission device, the cutting disc, the connecting piece, the power source and the transmission device are arranged on the bearing mechanism, the transmission device comprises an output gear arranged at one end of the power source and an input gear arranged on the connecting piece, one side of the transmission device is provided with a detection device used for detecting the tooth surface abrasion of the transmission device, the detection device comprises a feedback mechanism and a display mechanism, the feedback mechanism is arranged at one side of the output gear at the detected side, the feedback mechanism detects the abrasion condition of the output gear through a speed difference and transmits the abrasion condition. The technical effect is that the detection device can detect the abrasion condition of the output gear and display the abrasion condition in a visual mode.

Description

Concrete cutting machine

Technical Field

The invention relates to the field of cutting devices, in particular to a concrete cutting machine.

Background

The concrete cutting machine is an important device in road construction, and is mainly used for grooving, trimming and cutting off of a concrete pavement, the concrete cutting machine drives a cutting disc to work through gear transmission by a power source, an input gear is a large gear, an output gear is a small gear, the thickness of a tooth root of the output gear is smaller than that of the tooth root of the input gear, the sliding coefficient of the output gear is smaller than that of the tooth profile of the input gear, the output gear is more easily worn and damaged and can reduce the cutting rate and secondary damage, the output gear is positioned in the cutting machine and is not easy to observe, and a device is needed to detect the output gear in the cutting machine and directly obtain the gear wear result.

At present, people send the sound through the transmission of the internal gear of the cutting machine and change and judge the gear wearing and tearing condition, but the noise is big and miscellaneous in the cutting process of the cutting machine, and people can not judge the sound change that the gear sent, can not know the internal gear wearing and tearing condition of the cutting machine.

Disclosure of Invention

The invention aims to provide a concrete cutting machine which has the advantages that the abrasion condition of an output gear inside the cutting machine is detected, the abrasion condition of the gear is displayed visually, and people can observe the abrasion condition easily.

The technical purpose of the invention is realized by the following technical scheme:

the utility model provides a concrete cutting machine, is including bearing the frame, it is equipped with cutting device on the frame to bear, and cutting device is including setting up cutting disc, connecting piece and power supply and the transmission on bearing the mechanism, and transmission is including setting up the output gear in power supply one end and setting up the input gear on the connecting piece, and transmission one side is equipped with the detection device who is used for detecting the wearing and tearing of transmission flank of tooth, still includes: the detection device comprises a feedback mechanism and a display mechanism, wherein the feedback mechanism is arranged on one side of the output gear on the detected side, the feedback mechanism detects the abrasion condition of the output gear through speed difference and transmits the abrasion condition to the display mechanism, and the display mechanism displays the abrasion condition of the output gear.

By adopting the technical scheme, the abrasion condition of the internal gear of the cutting machine is visualized, so that a constructor can accurately judge the abrasion condition of the internal gear of the cutting machine and replace the gear in time, and the time cost and the labor cost loss caused by sound judgment errors in the prior art are avoided; meanwhile, on one hand, the worn gear is replaced in time, so that the cutting machine can keep an efficient cutting mode, and the working efficiency of the cutting machine is improved; on the other hand, the abrasion of the cutting machine caused by the splash of the abrasion gear can be prevented, and the service life of the cutting machine is prolonged.

Further setting: the feedback device includes an input member that inputs the power of the output gear to the detection device and an output member that converts the power to the display mechanism.

Through adopting above-mentioned technical scheme, the gear train transmission, the transmission is stable to the transmission accuracy is high, and the testing result that obtains is more accurate, change wearing and tearing gear that can be timely, better protection cutting machine.

Further setting: the input component comprises a transmission gear arranged at the other end of the power shaft, and an output component is arranged on one side of the transmission gear.

The output part comprises an output shaft arranged on one side of the output gear, a detection gear is arranged on the output shaft and fixedly connected with a shaft, the detection gear is meshed with the output gear, the other end of the output shaft is a threaded shaft, a threaded shaft sleeve is sleeved on the threaded shaft, the threaded shaft is in threaded connection with the threaded shaft sleeve, a feedback gear is arranged on the threaded shaft sleeve and fixedly connected with the threaded shaft sleeve, and the feedback gear is meshed with the transmission gear.

Through adopting above-mentioned technical scheme, gear engagement transmission, driven stability is high, and the displacement that obtains is more accurate, inside better knowing the cutting machine.

Further setting: the display mechanism comprises a transmission part and a dial part, wherein the transmission part converts the power of the output part into displacement, and the dial part displays the wear condition of the input gear in the form of displacement.

By adopting the technical scheme, the power of the output part is converted into a displacement form, and the gear abrasion condition can be directly known only by observing the displacement on the dial part.

Further setting: the transmission part comprises a bearing arranged on the threaded shaft sleeve, a fixed block is arranged on the bearing and fixedly connected with the bearing, an indicating rod is arranged on the fixed block, and one end of the indicating rod points to the inside of the dial part.

The dial part comprises an indicating needle arranged at the upper end of the indicating rod, a dial is arranged behind the indicating needle, and first scale marks and second scale marks which are arranged at intervals are arranged on the dial.

Through adopting above-mentioned technical scheme, the damaged condition of gear is differentiateed to the visual observation pointer shift position, and is simple and clear.

Further setting: detection device one side is equipped with the lubricating arrangement lubricated to output gear and input gear, and lubricating arrangement blocks epaxial hole including setting up the axle that blocks at the pilot lever lateral wall, blocks that axle one end is equipped with defeated oil pipe, blocks that the axle passes defeated oil pipe, blocks that axle and defeated oil pipe cutting ferrule are connected, is equipped with the oil-out on the defeated oil pipe.

By adopting the technical scheme, when the output gear is worn, the lubricating device discharges lubricating oil, impurities on the surface of the gear are washed away, friction is reduced, and the wear of the worn gear is slowed down.

Further setting: be equipped with water tank and oil tank on the power supply, the power supply downside is equipped with bears the base, bear base and power supply fixed connection, be equipped with the protection casing on bearing the base, be equipped with the dust extraction that reduces the raise dust in the protection casing and reduce the heat sink of cutting dish temperature, the protection casing front end is equipped with the guide bar, the guide bar is connected with protection casing normal running fit, the guide bar front end is equipped with the leading wheel, the leading wheel is connected with the guide bar normal running fit, the protection casing rear side is provided with the wheel, the wheel is connected with bearing the base normal running fit, the wheel upper end is equipped with the fender, fender and.

By adopting the technical scheme, the cutting machine can move in a rolling manner, so that the labor is saved and the convenience is realized.

Further setting: the transmission device comprises an input shaft arranged on one side of the power source, the input shaft is connected with the power source in a rotating fit mode, an input gear is arranged on the input shaft, an output gear is arranged on one side of the input gear, the input gear is meshed with the output gear, an output shaft is arranged in the output gear, and the output shaft is connected with the output gear in a key mode.

Through adopting above-mentioned technical scheme, the transmission is steady between power supply and the output shaft, and transmission efficiency is high, and transmission process energy loss is few.

Further setting: the dust suction device comprises a storage box arranged on the upper end face of the bearing base, the storage box is fixedly connected with the bearing base, a dust collector is arranged in the storage box, a dust collection pipe is arranged at one end of the dust collector, and a dust collection cover is arranged in the protective cover and penetrates through the protective cover to be communicated with the dust collection cover.

Through adopting above-mentioned technical scheme, absorb the raise dust that produces among the cutting process, reduce the pollution.

Further setting: the cooling device comprises a water storage tank arranged on the bearing base, a water pump is arranged in the water storage tank, an input pipeline is arranged at one end of the water pump, the input pipeline penetrates through the water storage tank to be communicated with the water tank, a water pipe is arranged at one end of the water tank, a water outlet pipe is arranged at one end of the protective cover, the water pipe penetrates through the protective cover to be communicated with the water outlet pipe, and a water.

By adopting the technical scheme, the temperature of the cutting disc is reduced in the cutting process of the cutting machine, and the loss of the cutting disc is reduced.

In conclusion, the invention has the following beneficial effects: the emission of raised dust is reduced through the cooling device and the dust suction device, and the environmental pollution is reduced; through the lubricating mechanism, the abrasion of the gear is reduced, and the material loss is reduced; the gear abrasion is detected through the detection device, the gear abrasion condition is displayed in a visual mode, the gear abrasion condition is simple, convenient and easy to perceive, the gear abrasion condition is timely replaced, the transmission efficiency of the gear which is prevented from being abraded is low, and the energy loss is large.

Drawings

FIG. 1 is a schematic structural view in the present embodiment;

FIG. 2 is a sectional view of the shield according to the present embodiment;

fig. 3 is a sectional view in the plan direction of the cutter according to the present embodiment;

fig. 4 is an enlarged schematic view of the structure of the detection device of the cutter in the present embodiment;

FIG. 5 is an enlarged schematic view of the structure of the detecting device of the cutter in the present embodiment

Fig. 6 is an enlarged schematic view of the structure of the lubricating device of the cutter in the present embodiment;

10. a guide wheel; 11. a guide bar; 12. a water tank; 13. a protective cover; 14. a fender; 15. a wheel; 16. a water storage tank; 17. a grip; 18. an oil tank; 19. cutting the disc; 20. a power shaft; 21. a dust hood; 22. a water outlet pipe; 23. a water outlet; 24. a fixed shaft; 25. a storage tank; 26. a vacuum cleaner; 27. a dust collection pipe; 28. a water pipe; 29. a power source; 30. A water pump; 31. an input pipe; 32. carrying the engine base; 55. a feedback mechanism; 66. a display mechanism; 100. a cutting device; 101. a cooling device; 102. a dust collection device; 103. a transmission device; 104. a detection device; 105. a lubricating device; 201. an indicator needle; 202. a first scale mark; 203. a second scale mark; 204. a third scale line; 205. a dial scale; 206. a threaded shaft; 207. detecting the gear; 208. an output shaft; 209. an output gear; 210. an input gear; 211. a bearing; 212. an input shaft; 213. a transmission gear; 214. a feedback gear; 215. a threaded shaft sleeve; 216. an indication lever; 217. a fixed block; 301. an oil delivery pipe; 302. an oil outlet; 303. a blocking shaft; 304. an aperture; 501. an input section; 502. a transmission member; 601. an output member; 602. a dial member.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment:

a concrete cutting machine is shown in figures 1 and 2 and comprises a bearing base 32, a cutting device 100 is arranged on the bearing base 32, and the cutting device 100 comprises a cutting disc 19, a power shaft 20, a power source 29 and a transmission device 103. Cutting disc 19 sets up on bearing base 32 through power shaft 20, and cutting disc 19 cuts the concrete, is equipped with power supply 29 on bearing base 32, and power supply 29 upside is equipped with oil tank 18, and oil tank 18 supplies energy to power supply 29, and power supply 29 provides power to cutting disc 19 through transmission 103.

As shown in fig. 2 and 3, a protective cover 13 is further arranged on the bearing base 32, the protective cover 13 is wrapped outside the cutting disc 19 in a semicircular shape, so that concrete can be effectively prevented from splashing, a fixing shaft 24 is arranged on one side of the protective cover 13, a guide rod 11 is arranged on the fixing shaft 24, a guide wheel 10 is arranged on the front side of the guide rod 11 and used for adjusting the cutting direction and ensuring the stability and the precision of the cutting machine in operation, a wheel 15 is arranged at the rear end of the bearing base 32, a mudguard 14 is arranged above the wheel 15, so that concrete can be prevented from splashing on a constructor, and the direction of the wheel 15 is the same as that of.

The temperature of the cutting disc 19 can rise rapidly and generate a large amount of dust during the cutting process, and the temperature reducing device 101 arranged on the bearing device 32 reduces the temperature of the cutting disc 19 and the dust suction device 102 is arranged on the bearing device to absorb the dust.

The temperature reducing device 101 reduces the temperature of the cutting disk 19 by water circulation. The cooling device 101 comprises a water outlet pipe 22 arranged in the protective cover 13, a plurality of water outlets 23 are arranged on the lower side of the water outlet pipe 22, the temperature of the cutting disc 19 is reduced and the splashing of dust is reduced through drainage, the water outlet pipe 22 penetrates through the protective cover 13 to be communicated with a water pipe 28, the other end of the water pipe 28 is communicated with the water tank 12, the height difference exists between the two ends of the water pipe 28, water in the water tank 12 naturally flows down due to gravity, an input pipeline 31 is arranged on the other side of the water tank 12, the other end of the input pipeline 31 is connected with a water pump 30, the water pump 30 is arranged in the water storage tank 16, and the water in.

The dust suction device 102 effectively absorbs the dust generated during the cutting process of the cutting disc 19. The dust collector 102 includes a storage bin 25 disposed above the load base 32 for storing dust drawn in. A dust collector 26 is arranged in the storage box 25, a dust suction pipe 27 of the dust collector 26 penetrates through the protective cover 13 to be connected with the dust suction cover 21, dust flying in the cutting process is effectively sucked by the dust suction cover 21, and the dust suction pipe 27 enters the dust collector 26 and is discharged into the storage box 25.

As shown in fig. 3, the transmission device 103 is required to effectively transmit the power of the power source 29 to the cutting disc 19, the transmission device 103 includes an input shaft 212 disposed on the side of the power source 29, the power source 29 drives the input shaft 212 to rotate, one end of the input shaft 212 is provided with an input gear 210, an output gear 209 with one side meshed with the input gear 210 is driven to rotate, the output gear 209 drives the power shaft 20 to rotate, so that the cutting disc 19 rotates, and the transmission device 103 is easy to damage in the using process and needs to be detected by the detection device 104.

As shown in fig. 4, the gear wear detection device 104 is further provided for detecting the wear of the tooth surface of the transmission device 103, the detection device 104 includes a feedback mechanism 55 and a display mechanism 66, the feedback mechanism 55 is provided on the output gear 209 side of the detected side, the feedback mechanism 55 detects the wear of the output gear 209 through the speed difference and transmits the wear to the display mechanism 66, and the display mechanism 66 displays the wear of the output gear 209.

As shown in fig. 5, the feedback mechanism 55 includes an input member 501, the input member 501 inputs power, the input member 501 includes a transmission gear 213 provided on the power shaft 20 opposite to the output gear 209, and the transmission gear 213 rotates at the same speed as the output gear 209.

The output component 502 converts the received force, the output component 502 comprises an output shaft 208 arranged on one side of an output gear 209, a detection gear 207 is arranged on the output shaft 208 and fixedly connected with the output shaft 208, the detection gear 207 is meshed with the output gear 209, the detection gear 207 and the output gear 209 have the same parameters, the rotation speed of the detection gear 207 is the same as that of the output gear 209, a threaded shaft 206 is arranged at one end of the output shaft 208, the output shaft 208 is fixedly connected with the threaded shaft 206, a threaded shaft sleeve 215 is sleeved on the threaded shaft 206, a feedback gear 214 is arranged on the threaded shaft sleeve 215, the feedback gear 214 is fixedly connected with the threaded shaft sleeve, the feedback gear 214 is the same as the output gear 209, and the feedback gear 214 is meshed with a transmission gear 213 at one end.

The feedback mechanism 55 is connected with a display mechanism 66, the display mechanism 66 is used for displaying the abrasion condition of the output gear 209 in the cutting machine, the display mechanism 66 comprises a transmission part 601, the transmission part 601 converts the force applied to the output part 502 into linear displacement, the transmission part 601 comprises a bearing 211 arranged on a threaded shaft sleeve 215, a fixed block 217 is arranged on the bearing 211, the fixed block 217 is fixedly connected with the bearing 211, an indicating rod 216 is arranged on the fixed block 217, a dial part 602 is arranged at one end of the indicating rod 216, the dial part 602 is used for assisting in displaying the abrasion condition, the dial part 602 comprises an indicating needle 201, a dial 205 is arranged outside the indicating needle 201, a first scale 202 is arranged in the dial 205, and a second scale 203 is arranged on the right side of the first scale 202.

When the output gear 209 is complete, the output gear 209 is meshed with the detection gear 207, the output gear 209 and the detection gear 207 have the same rotating speed, a transmission gear 213 at one end of the output gear 209 has the same rotating speed as the output gear 209, the transmission gear 213 is meshed with a feedback gear 214, the transmission gear 213 has the same rotating speed as the feedback gear, so that the rotating speed of a threaded shaft sleeve 215 is the same as that of a threaded shaft 206, the threaded shaft sleeve 215 and the threaded shaft 206 cannot rotate relatively, the indicating needle 201 on the threaded shaft sleeve 215 cannot move, the input gear 210 is meshed with the output gear 209, the thickness of the tooth root of the output gear 209 is smaller than that of the tooth root of the input gear 210, the sliding coefficient of the output gear 209 is smaller than that of the.

When the output gear 209 is worn, the meshing gap between the detection gear 207 and the output gear 209 in the feedback mechanism 55 is increased, the rotation speed of the detection gear 207 is reduced, so that the rotation speed of the threaded shaft 206 in the detection gear 207 is reduced, the transmission gear 213 is coaxial with the output gear 209 and keeps constant, the feedback gear 214 is meshed with the transmission gear 213, the rotation speed of the feedback gear 214 is constant, so that the rotation speed of the threaded shaft sleeve 215 fixedly connected with the feedback gear 214 is constant, so that the rotation speed of the threaded shaft sleeve 215 is higher than that of the threaded shaft 206, the threaded shaft sleeve 215 rotates relative to the threaded shaft 206, the threaded shaft sleeve 215 moves along the direction of the detection gear 207, the bearing 211 on the threaded shaft sleeve 215 moves synchronously and drives the fixing block 217 to move, so that the indicator needle 201 moves, when the worn output gear 209 rotates once and then is meshed with the detection gear 207 again, the speed of the output, the rotation speed of the threaded shaft sleeve 215 is the same as that of the threaded shaft 206, the movement is stopped, so that the pointer 201 stops moving, the pointer 201 is between the first scale mark 202 and the second scale mark 203, the output gear 209 does not need to be replaced, when the pointer 201 exceeds the second scale mark 203, the output gear 209 cannot work normally, the hidden danger is large, the output gear 209 is replaced immediately, the threaded shaft sleeve 215 is restored to the original position, and the pointer 201 is restored to the starting point.

As shown in fig. 6, the lubricating device 105 is further provided, the lubricating device 105 includes that a blocking shaft 303 is arranged on the side wall of the indication rod 216, a hole 304 is formed in the blocking shaft 303, the width of the hole 304 is the same as the distance from the first scale mark 202 to the second scale mark 203 in the scale plate 205, the blocking shaft 303 penetrates through the oil pipeline 301 to control the circulation of lubricating oil in the oil pipeline 301, when the output gear 209 is complete, the fixing block 217 is not moved, the blocking shaft 303 just blocks the oil outlet 302 of the oil pipeline 301, and the lubricating device 105 is static.

When the output gear 209 is worn, the threaded shaft sleeve 215 starts to move to drive the indicating rod 216 to start to move, so that the blocking shaft 303 on the indicating rod 216 moves, the oil outlet 302 is communicated with the hole 304 on the blocking shaft 303, and lubricating oil in the oil pipeline 301 falls to the meshing position of the input gear 210 and the output gear 209, so that the lubrication is increased, and the wear rate is reduced.

When the pointer 201 moves to the second graduation mark 203, the hole 304 on the blocking shaft 303 passes through the oil outlet 302 completely, the oil outlet 302 is sealed with the blocking shaft 303 again, the lubricating oil stops flowing out, the lubricating device 105 is stopped, the cutting machine is stopped immediately, and the worn output gear 209 is replaced.

The above-mentioned embodiments are merely illustrative and not restrictive, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but only protected by the patent laws within the scope of the claims.

Claims

1. The utility model provides a concrete cutting machine, is including bearing frame (32), be equipped with cutting device (100) on bearing frame (32), cutting device (100) are including cutting dish (19), connecting piece (20) and power supply (29) and transmission (101), and transmission (101) are including setting up output gear (210) and input gear (209) of setting on connecting piece (20) of power supply (29) one end, its characterized in that: a detection device (104) for detecting tooth surface abrasion of the transmission device (103) is arranged on one side of the transmission device (101), the detection device (104) comprises a feedback mechanism (55) and a display mechanism (66), the feedback mechanism (55) is arranged on one side of an output gear (209) on the detected side, the feedback mechanism (55) detects the abrasion condition of the output gear (209) through speed difference and transmits the abrasion condition to the display mechanism (66), and the display mechanism (66) displays the abrasion condition of the output gear (209).

2. A concrete cutting machine according to claim 1, characterized in that: the feedback device (55) includes an input member (501) that inputs the power of the output gear (209) to the detection device (104) and an output member (502) that converts the power to the display mechanism (66).

3. A concrete cutting machine according to claim 2, characterized in that: the input component (501), the input component (501) comprises a transmission gear (213) arranged at the other end of the power shaft (20), and an output component (502) is arranged on one side of the transmission gear (213);

the output part (502) comprises an output shaft (208) arranged on one side of the output gear (209), the output shaft (208) is provided with a detection gear (207), the detection gear (207) is fixedly connected with the output shaft (208), the detection gear (207) is meshed with the output gear (209), the other end of the output shaft (208) is a threaded shaft (206), the threaded shaft (206) is sleeved with a threaded shaft sleeve (215), the threaded shaft (206) is in threaded connection with the threaded shaft sleeve (215), the threaded shaft sleeve (215) is provided with a feedback gear (214), the feedback gear (214) is fixedly connected with the threaded shaft sleeve (215), and the feedback gear (214) is meshed with a transmission gear (213).

4. A concrete cutting machine according to claim 1, characterized in that: the display mechanism (66) comprises a transmission component (601) and a dial component (602), wherein the transmission component (601) converts the power of the output component (502) into displacement, and the dial component (602) displays the abrasion condition of the input gear (209) in the form of displacement.

5. A concrete cutting machine according to claim 4, characterized in that: the transmission part (601) comprises a bearing (211) arranged on a threaded shaft sleeve (215), a fixing block (217) is arranged on the bearing (211), the fixing block (217) is fixedly connected with the bearing (211), an indicating rod (216) is arranged on the fixing block (217), one end of the indicating rod (216) points into a dial part (602), the dial part (602) comprises an indicating needle (201) arranged at the upper end of the indicating rod (216), a dial (205) is arranged behind the indicating needle (201), and first scale marks (202) and second scale marks (203) which are arranged at intervals are arranged on the dial (205).

6. A concrete cutting machine according to claim 1, characterized in that: detection device (104) one side is equipped with lubricating arrangement (105) lubricated to output gear (209) and input gear (210) with instruction pole (216) linkage, lubricating arrangement (105) are including setting up block axle (303) at instruction pole (216) lateral wall, be equipped with hole (304) on block axle (303), block axle (303) one end and be equipped with defeated oil pipe (301), block axle (303) and pass defeated oil pipe (301), block axle (303) and defeated oil pipe (301) cutting ferrule connection, be equipped with oil-out (302) on defeated oil pipe (301).

7. A concrete cutting machine according to claim 1, characterized in that: be equipped with water tank (12) and oil tank (18) on power supply (29), power supply (29) downside is equipped with bears base (32), bear base (32) and power supply (29) fixed connection, be equipped with protection casing (13) on bearing base (32), be equipped with dust extraction (102) and the heat sink (101) that reduces cutting disc (19) temperature that reduce the raise dust in protection casing (13), protection casing (13) front end is equipped with guide bar (11), guide bar (11) are connected with protection casing (13) normal running fit, guide bar (11) front end is equipped with leading wheel (10), leading wheel (10) are connected with guide bar (11) normal running fit, protection casing (13) rear side is provided with wheel (15), wheel (15) are connected with bearing base (32) normal running fit, wheel (15) upper end is equipped with fender (14), fender (14) and bearing base (32) fixed connection.

8. A concrete cutting machine according to claim 7, characterized in that: the transmission device (103) comprises an input shaft (212) arranged on one side of the power source (29), the input shaft (212) is connected with the power source (29) in a rotating fit mode, an input gear (210) is arranged on the input shaft (212), an output gear (209) is arranged on one side of the input gear (210), the input gear (210) is meshed with the output gear (209), an output shaft (208) is arranged in the output gear (209), and the output shaft (208) is connected with the output gear (209) in a key mode.

9. A concrete cutting machine according to claim 7, characterized in that: the dust collection device (102) comprises a storage box (25) arranged on the upper end face of the bearing base (32), the storage box (25) is fixedly connected with the bearing base (32), a dust collector (26) is arranged in the storage box (25), a dust collection pipe (27) is arranged at one end of the dust collector (26), and a dust collection cover (21) is arranged in the protective cover (13), and the dust collection pipe (27) penetrates through the protective cover (13) to be communicated with the dust collection cover (21).

10. A concrete cutting machine according to claim 7, characterized in that: the cooling device (101) comprises a water storage tank (16) arranged on a bearing base (32), a water pump (30) is arranged in the water storage tank (16), an input pipeline (31) is arranged at one end of the water pump (30), the input pipeline (31) penetrates through the water storage tank (16) to be communicated with the water tank (12), a water pipe (28) is arranged at one end of the water tank (12), a water outlet pipe (22) is arranged at one end of a protective cover (13), the water pipe (28) penetrates through the protective cover (13) to be communicated with the water outlet pipe (22), and a water outlet (23) is formed in.