Milling cutter type pavement crack expanding machine and crack expanding method

Abstract

The invention relates to the technical field of highway engineering highway asphalt pavement crack expanding and repairing, and discloses a milling cutter type pavement crack expanding machine and a crack expanding method.The milling cutter type pavement crack expanding machine comprises a machine body, an engine is installed at the top of the machine body, the output end of the engine is connected with a transmission shaft, and a milling cutter is arranged at the bottom of the transmission shaft; the adjusting mechanism comprises a telescopic assembly, a limiting assembly and a connecting assembly, the connecting assembly is located between the transmission shaft and the milling cutter, the limiting assembly is located in the connecting assembly, and the telescopic assembly is located between the machine body and the limiting assembly; through the arrangement of the adjusting mechanism, the distance between the milling cutter and the ground can be adjusted, the cutting depth can be accurately controlled, the machined surface is smoother, the conditions that adjustment is difficult and the construction efficiency is reduced are avoided, and meanwhile the problems that in an existing device, due to the improper height of the milling cutter, the milling cutter is prone to being excessively stressed, and the machining efficiency is affected are solved. Abrasion of the cutter is accelerated, and even equipment parts are damaged.

Description

Technical Field

[0001] The invention relates to the technical field of crack expansion and repair of asphalt pavement on highway engineering, in particular to a milling cutter type pavement crack expansion machine and a crack expansion method. Background Art

[0002] The milling cutter-type pavement crack expander is a mechanical equipment specially used for road maintenance. It is mainly used to expand cracks on the road surface for effective repair. The equipment is equipped with a rotating milling cutter. By cutting the pavement material at high speed, the width and depth of the cracks can be accurately controlled. After the crack is expanded, the crack repair material can be better filled to improve the repair effect and the service life of the road.

[0003] A Chinese patent with announcement number CN219508346U discloses a milling cutter-type pavement crack expansion device, which has the advantages of strong practicality, easy operation and high efficiency. During the pavement crack expansion construction, the hand-pushing handrail assembly enables the utility model device to move along the pavement crack, and the high-speed rotating milling cutter head can perform rotary cutting on the crack, which is simple and efficient. In addition, by adjusting the lifting mechanism and replacing the size of the milling cutter head, the expansion requirements of cracks of different depths and widths can be met, and the application range is wide; however, it is difficult to adjust the distance between the milling cutter and the ground when using the above-mentioned device, and the cutting depth cannot be accurately controlled, resulting in uneven surface processing or failure to meet design requirements. In addition, during the pavement repair or construction process, the height of the milling cutter needs to be adjusted according to different crack depths and pavement conditions. The difficulty in adjustment will increase the operation time and difficulty, reduce construction efficiency, and inappropriate milling cutter height is likely to cause excessive force on the milling cutter, accelerate tool wear, and even damage equipment components. Summary of the invention

[0004] The purpose of the present invention is to provide a milling cutter-type pavement crack expander, which can adjust the distance between the milling cutter and the ground, can accurately control the cutting depth, so that the processed surface is smoother and meets the design requirements, and in the process of pavement repair or construction, the height of the milling cutter can be adjusted according to different crack depths and pavement conditions, avoiding the difficulty of adjustment, increasing operation time and difficulty, and reducing construction efficiency. At the same time, it solves the problem that the inappropriate milling cutter height in the existing device easily causes the milling cutter to be overstressed and accelerates the wear of the tool. It solves the problem in the background technology that it is difficult to adjust the distance between the milling cutter and the ground, and it is impossible to accurately control the cutting depth, resulting in the processed surface being uneven or not meeting the design requirements.

[0005] In order to solve the above technical problems, according to a first aspect of the present invention, a milling cutter type pavement crack expanding machine is provided, comprising:

[0006] A machine body, an engine is installed on the top of the machine body, a transmission shaft is connected to the output end of the engine, and a milling cutter is arranged at the bottom of the transmission shaft;

[0007] A dust suction mechanism, which is located between the machine body and the milling cutter and is used to absorb dust generated during the cutting process;

[0008] A wind blowing mechanism, which is located on one side of the machine body and is used to blow the ground to be cut by wind;

[0009] And an adjusting mechanism, which is located between the transmission shaft and the milling cutter and is used to adjust the distance between the milling cutter and the ground, the adjusting mechanism includes a telescopic component, a limiting component and a connecting component, the connecting component is located between the transmission shaft and the milling cutter and is used to connect the transmission shaft and the milling cutter, the limiting component is located inside the connecting component and is used to limit the milling cutter during work, and the telescopic component is located between the machine body and the limiting component and is used to control the vertical movement of the milling cutter.

[0010] Preferably, the connecting assembly includes a mounting seat installed on the top of the milling cutter and a receiving groove opened inside the transmission shaft, a linkage shaft is fixed on the top of the mounting seat, the linkage shaft corresponds to the receiving groove, and a plurality of evenly distributed sliding bars are fixed to the outer wall of the linkage shaft, and a plurality of sliding grooves for the sliding bars to slide are opened on the outer wall of the receiving groove, so that the milling cutter can be effectively limited during the up and down adjustment process, ensuring that the milling cutter remains within the set depth range during adjustment, avoiding excessively deep or shallow cutting, thereby improving the processing accuracy, and at the same time avoiding equipment loss of control or accidents caused by excessive adjustment during operation, thereby improving operational safety.

[0011] Preferably, the limit assembly includes a movable seat arranged on the outer wall of the mounting seat, the top of the movable seat is connected to the bottom of the linkage shaft, the outer wall of the mounting seat is fixed with a limit plate, and a limit cavity for the sliding of the limit plate is opened in the interior of the movable seat, and the linkage shaft can be driven to move when the movable seat moves up and down, and the movable seat can drive the mounting seat to move, and the milling cutter can be driven to move by the movement of the mounting seat, so as to realize the adjustment of the upper and lower positions of the milling cutter. When the engine drives the transmission shaft to rotate, the transmission shaft drives the sliding bar to rotate, so that the linkage shaft can be rotated, and the mounting seat is driven to rotate by the rotation of the linkage shaft, and the milling cutter is driven to rotate by the rotation of the mounting seat, so as to realize the work of the milling cutter, and the movement of the telescopic assembly is avoided by the mutual cooperation of the limit plate and the limit cavity, so that the movable seat is always at the top of the mounting seat, and the linkage shaft will not enter the interior of the movable seat, thereby avoiding the invalid operation of the telescopic assembly.

[0012] Preferably, the telescopic assembly includes an electric push rod fixed at the bottom of the machine body, the telescopic end of the electric push rod is connected to a linkage plate, the linkage plate is connected to a movable seat, a movable plate is fixed on one side of the movable seat corresponding to the linkage plate, a linkage rod is fixed on the top of the movable plate, and the linkage rod is plugged into the machine body.

[0013] Preferably, an armrest is fixed on the top of the body, a plurality of evenly distributed support columns are fixed on the top of the armrest, a push plate is commonly fixed on the top of the plurality of support columns, a handle is installed on one side of the push plate, and moving wheels are installed on the bottom of the body.

[0014] Preferably, the dust suction mechanism comprises a vacuum cleaner fixed on the top of the machine body, the output end of the vacuum cleaner is connected to an air inlet pipe, one end of the air inlet pipe is connected to a directional tube, and one side of the directional tube is provided with a wrapping component for wrapping the milling cutter.

[0015] Preferably, the wrapping assembly includes a U-shaped support plate connected to one side of the pointing tube, the U-shaped support plate is sleeved on the outer wall of the milling cutter, and a plurality of evenly distributed suction heads are connected to the inner side of the U-shaped support plate, and a reinforcement plate is fixed to the top of the U-shaped support plate, and the reinforcement plate is connected to the machine body. Through the setting of the U-shaped support plate, the suction head can work around the milling cutter during the process of sucking dust, and the suction head is inclined inside the U-shaped support plate, and the air inlet end of the suction head faces the ground, so that efficient absorption can be achieved.

[0016] Preferably, the blowing mechanism includes a blower arranged at the bottom of the machine body, the air outlet end of the blower is connected to an air outlet pipe, the air outlet pipe corresponds to the ground, and a filter is installed inside the air outlet pipe, a reinforcement rod is fixed to the bottom of the blower, a reinforcement sleeve is fixed to one side of the reinforcement rod, the reinforcement sleeve is sleeved on the outer wall of the air outlet pipe, and a disassembly component for disassembling the blower is provided between the blower and the machine body.

[0017] Preferably, the disassembly assembly includes two mounting blocks fixed on the top of the blower, the two mounting blocks are plugged into the body, a fixing groove is opened on one side of the body, a movable sleeve is arranged inside the fixing groove, an insertion rod is fixed on one side of the movable sleeve, the insertion rod is plugged into the two mounting blocks, an extrusion spring is connected between the movable sleeve and the fixing groove, and a movable rod is fixed on one side of the movable sleeve, the extrusion spring is sleeved on the outer wall of the movable rod, a control panel is fixed on one side of the movable sleeve, a fixing plate is installed on the bottom of the body, and an insertion plate is fixed on one side of the blower, and the insertion plate is plugged into the fixed plate.

[0018] Preferably, a tool seat is fixed on the top of the milling cutter, groove cavities are opened on both sides of the interior of the mounting seat, a positioning plate is installed inside the groove cavity, blocks are fixed on both sides of the positioning plate, movable cavities for the movement of the blocks are opened on both sides of the groove cavity, a limiting spring is connected between the positioning plate and the groove cavity, blocks are inserted on both sides of the tool seat, a baffle is fixed on one side of the block, and a limiting ring for limiting the baffle is provided on the outer wall of the mounting seat, and the baffle cooperates with the limiting ring.

[0019] According to a second aspect of the present invention, a milling cutter-type pavement crack expansion method is provided, which is implemented by using the milling cutter-type pavement crack expansion machine, and comprises the following steps:

[0020] S100: Starting the equipment: The operator starts the engine, which drives the milling cutter to rotate through the transmission shaft;

[0021] S200: Adjust the position of the milling cutter: adjust the distance between the milling cutter and the ground through the telescopic action of the electric push rod to ensure that the cutting depth meets the requirements;

[0022] S300: Start cutting: The operator pushes the equipment to the road surface to be cut, and the milling cutter starts cutting;

[0023] S400: Cutting completed: After cutting is completed, the operator turns off the engine and moves the equipment to the next work point.

[0024] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0025] 1. The present invention can adjust the distance between the milling cutter and the ground through the setting of the adjustment mechanism, and can accurately control the cutting depth, so that the processed surface is smoother and meets the design requirements. In addition, during the road repair or construction process, the height of the milling cutter can be adjusted according to different crack depths and road conditions, avoiding the situation where the adjustment is difficult, the operation time and difficulty are increased, and the construction efficiency is reduced. At the same time, the problem that the inappropriate milling cutter height in the existing device easily causes the milling cutter to be overstressed, accelerates the wear of the tool, and even damages the equipment parts is solved;

[0026] 2. The present invention can absorb the dust generated during the cutting process by setting up the dust collection mechanism, which can effectively reduce the dust flying outward, reduce the pollution to the surrounding atmospheric environment, and create cleaner air conditions for the surrounding residents and the environment. The effective dust collection device can greatly reduce the dust concentration in the working area and reduce the amount of dust inhaled by the construction workers, thereby reducing the risk of occupational diseases and protecting the health of the construction workers. At the same time, it can improve the visibility and sanitary conditions of the workplace, allowing the construction workers to work in a relatively comfortable environment and improve their work enthusiasm and efficiency.

[0027] 3. The present invention can achieve blowing of the ground during the cutting process through the setting of the air blowing mechanism, and can further blow the chips and dust away from the working surface, ensuring that the cutting area is always kept clean while avoiding dust accumulation, making it convenient for the dust suction mechanism to absorb it, reducing secondary cutting and operating difficulty. The cleaning of the cutting surface can ensure that the cutting depth and width are more uniform, improve the processing quality and precision, and can better adapt to different construction environments and working conditions, and can maintain a good working condition regardless of whether it is a dry or wet road surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 A side view of the present invention as a whole;

[0030] Figure 3 A cross-sectional view of the present invention as a whole;

[0031] Figure 4 It is a structural schematic diagram of the regulating mechanism of the present invention;

[0032] Figure 5 is a cross-sectional view of the adjustment mechanism of the present invention;

[0033] Figure 6 It is a structural schematic diagram of the dust collection mechanism of the present invention;

[0034] Figure 7 It is a structural schematic diagram of the hair dryer mechanism of the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of the hair dryer of the present invention when it is disassembled;

[0036] Fig. 9 It is a structural schematic diagram of the back side of the hair dryer structure of the present invention;

[0037] Fig.10 It is a cross-sectional view of the mounting seat of the present invention.

[0038] Among them: 1. body; 2. engine; 3. dust suction mechanism; 4. blower mechanism; 5. handle; 6. armrest; 7. moving wheel; 8. milling cutter; 9. transmission shaft; 10. electric push rod; 11. linkage plate; 12. moving seat; 13. linkage rod; 14. mounting seat; 15. linkage shaft; 16. limit plate; 17. baffle; 18. limit ring; 19. cutter seat; 20. limit spring;

[0039] 31. Vacuum cleaner; 32. Directional tube; 33. U-shaped support plate; 34. Air inlet pipe; 35. Suction head; 36. Reinforcement plate;

[0040] 41. Blower; 42. Mounting block; 43. Extrusion spring; 44. Air outlet pipe; 45. Fixed plate; 46. Movable rod; 47. Control panel; 48. Insert rod; 49. Reinforcement rod; 410. Reinforcement sleeve; 411. Filter; 412. Insert plate. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1 , Figure 2 and Figure 3 The milling cutter type pavement crack expanding machine comprises: a machine body 1, an engine 2 is installed on the top of the machine body 1, a transmission shaft 9 is connected to the output end of the engine 2, a milling cutter 8 is arranged at the bottom of the transmission shaft 9, a handrail 6 is fixed on the top of the machine body 1, a plurality of evenly distributed support columns are fixed on the top of the handrail 6, a push plate is fixed on the top of the plurality of support columns, a handle 5 is installed on one side of the push plate, and a moving wheel 7 is installed at the bottom of the machine body 1;

[0043] The push plate is driven to move by the handle 5, and the armrest 6 is driven to move by the push plate. The machine body 1 is moved by the moving wheels 7 through the armrest 6, so that the machine body 1 can be moved while working.

[0044] Please refer to Figure 2 - Figure 5, an adjustment mechanism, the adjustment mechanism is located between the transmission shaft 9 and the milling cutter 8 and is used to adjust the distance between the milling cutter 8 and the ground, the adjustment mechanism includes a telescopic component, a limit component and a connecting component, the connecting component is located between the transmission shaft 9 and the milling cutter 8 and is used to connect the transmission shaft 9 and the milling cutter 8, the limit component is located inside the connecting component and is used to limit the milling cutter 8 during the working process, the telescopic component is located between the machine body 1 and the limit component and is used to control the milling cutter 8 to move vertically, the connecting component includes a mounting seat 14 installed on the top of the milling cutter 8 and a storage groove opened inside the transmission shaft 9, a linkage shaft 15 is fixed on the top of the mounting seat 14, the linkage shaft 15 corresponds to the storage groove, and the linkage shaft 15 The outer wall of the housing 14 is fixed with a plurality of evenly distributed slide bars, the outer wall of the storage groove is provided with a plurality of slide grooves for the slide bars to slide, the limit assembly comprises a moving seat 12 sleeved on the outer wall of the mounting seat 14, the top of the moving seat 12 is connected to the bottom of the linkage shaft 15, the outer wall of the mounting seat 14 is fixed with a limit plate 16, the interior of the moving seat 12 is provided with a limit cavity for the limit plate 16 to slide, the telescopic assembly comprises an electric push rod 10 fixed to the bottom of the body 1, the telescopic end of the electric push rod 10 is connected with a linkage plate 11, the linkage plate 11 is connected to the moving seat 12, a moving plate is fixed on one side of the moving seat 12 corresponding to the linkage plate 11, a linkage rod 13 is fixed on the top of the moving plate, and the linkage rod 13 is plugged into the body 1;

[0045] The linkage plate 11 is driven to move by the electric push rod 10, and the movement of the linkage plate 11 drives the moving seat 12 to move, and the movement of the moving seat 12 drives the moving plate to move synchronously, and the movement of the moving plate drives the linkage rod 13 to move, and the movement of the linkage rod 13 makes it plugged with the machine body 1. When the linkage plate 11 and the moving plate move at the same time, the moving seat 12 drives the linkage shaft 15 to move, and the movement of the linkage shaft 15 drives multiple slide bars to slide in multiple slide grooves, and the linkage shaft 15 moves in the storage groove through the mutual cooperation of the slide bar and the slide groove, and the movement of the linkage shaft 15 drives the mounting seat 14 to move, and the movement of the mounting seat 14 drives the milling cutter 8 to move, so that the distance between the milling cutter 8 and the ground can be adjusted, so as to adapt to different work requirements.

[0046] Please refer to Figure 1 and Figure 6, a dust suction mechanism 3, which is located between the machine body 1 and the milling cutter 8 and is used to absorb dust generated during the cutting process, and the dust suction mechanism 3 includes a dust collector 31 fixed on the top of the machine body 1, and an output end of the dust collector 31 is connected to an air inlet pipe 34, and one end of the air inlet pipe 34 is connected to a directional pipe 32, and a wrapping component for wrapping the milling cutter 8 is provided on one side of the directional pipe 32, and the wrapping component includes a U-shaped support plate 33 connected to one side of the directional pipe 32, and the U-shaped support plate 33 is sleeved on the outer wall of the milling cutter 8, and a plurality of evenly distributed suction heads 35 are connected to the inner side of the U-shaped support plate 33, and a reinforcing plate 36 is fixed on the top of the U-shaped support plate 33, and the reinforcing plate 36 is connected to the machine body 1;

[0047] Suction is generated by the vacuum cleaner 31, and the dust generated during the cutting process is absorbed by the multiple suction heads 35. The dust can be effectively absorbed by the arrangement of the pointing tube 32 and the air inlet pipe 34, thereby achieving high efficiency and environmental protection.

[0048] Please also refer to Figure 7 , Figure 8 and Fig. 9 , a blower mechanism 4, which is located at one side of the machine body 1 and is used to blow the ground to be cut by wind, and the blower mechanism 4 includes a blower 41 arranged at the bottom of the machine body 1, and the air outlet end of the blower 41 is connected to an air outlet pipe 44, the air outlet pipe 44 corresponds to the ground, and a filter screen 411 is installed inside the air outlet pipe 44, a reinforcement rod 49 is fixed to the bottom of the blower 41, a reinforcement sleeve 410 is fixed to one side of the reinforcement rod 49, and the reinforcement sleeve 410 is sleeved on the outer wall of the air outlet pipe 44, and a disassembly component for disassembling the blower 41 is arranged between the blower 41 and the machine body 1, and the disassembly component includes a filter 411 fixed to the bottom of the blower 41, and a filter 411 is installed inside the air outlet pipe 4 ... Two mounting blocks 42 are provided on the top of the blower 41, and the two mounting blocks 42 are plugged into the machine body 1. A fixing groove is provided on one side of the machine body 1, and a movable sleeve is provided inside the fixing groove. A plug rod 48 is fixed on one side of the movable sleeve, and the plug rod 48 is plugged into the two mounting blocks 42. An extrusion spring 43 is connected between the movable sleeve and the fixing groove, and a movable rod 46 is fixed on one side of the movable sleeve, and the extrusion spring 43 is sleeved on the outer wall of the movable rod 46. A control board 47 is fixed on one side of the movable sleeve, and a fixing plate 45 is installed on the bottom of the machine body 1. A plug plate 412 is fixed on one side of the blower 41, and the plug plate 412 is plugged into the fixing plate 45.

[0049] By setting the blower 41, wind force enters the air outlet pipe 44, and a blowing force is formed through the air outlet pipe 44. By setting the filter 411, the blown dust can be blocked by the filter 411 to prevent dust from flowing back into the air outlet pipe 44 and causing damage. Pulling the control plate 47 drives the movable sleeve to move in the fixed groove, and the movement of the movable sleeve drives the extrusion spring 43 to contract. The contraction of the extrusion spring 43 causes the insertion rod 48 to move accordingly, and the movement of the insertion rod 48 separates it from the two mounting blocks 42. After the insertion rod 48 is separated from the two mounting blocks 42, the blower 41 is pulled to drive the two mounting blocks 42 to separate from the body 1, and the movement of the blower 41 drives the insertion plate 412 to move, and the movement of the insertion plate 412 separates it from the fixed plate 45, so that the blower 41 can be disassembled, thereby facilitating the user to maintain and repair it.

[0050] Finally, please refer to Fig.10 A cutter seat 19 is fixed on the top of the milling cutter 8, grooves are provided on both sides of the mounting seat 14, positioning plates are installed inside the grooves, blocks are fixed on both sides of the positioning plates, moving cavities for the blocks to move are provided on both sides of the grooves, and a limiting spring 20 is connected between the positioning plates and the grooves. Insert blocks are inserted on both sides of the cutter seat 19, and a baffle 17 is fixed on one side of the insert block. A limiting ring 18 for limiting the baffle 17 is provided on the outer wall of the mounting seat 14, and the baffle cooperates with the limiting ring 18;

[0051] Pushing the positioning plate drives the limit spring 20 to contract, and the contraction of the limit spring 20 allows the positioning plate to enter the groove cavity. After the positioning plate enters the groove cavity, it is separated from the limit ring 18, and then the limit ring 18 is pulled to separate it from the baffle 17. When the limit ring 18 and the baffle 17 are separated from each other, the baffle 17 is pulled to drive the plug block to move, and the movement of the plug block separates it from the tool holder 19. After the plug block and the tool holder 19 are separated from each other, the milling cutter 8 can be effectively disassembled, thereby facilitating its replacement.

[0052] A blower 41 is installed at the bottom of the machine body 1, and the blower 41 transmits wind power to the ground to be cut through the air outlet pipe 44;

[0053] The wind force generated by the blower 41 can help remove chips, keep the cutting surface clean, and reduce dust, thereby improving the working environment;

[0054] The adjustment mechanism realizes precise adjustment of the distance between the milling cutter 8 and the ground through the telescopic component, the limit component and the connecting component;

[0055] A mounting seat 14 is installed on the top of the milling cutter 8, and a linkage shaft 15 is fixed on the top of the mounting seat 14. The linkage shaft 15 corresponds to the storage groove in the transmission shaft 9, and a sliding connection is achieved through a slide bar and a slide groove;

[0056] The outer wall of the mounting seat 14 is sleeved with a moving seat 12, the top of the moving seat 12 is connected to the bottom of the linkage shaft 15, the outer wall of the mounting seat 14 is fixed with a limiting plate 16, and the inside of the moving seat 12 is provided with a limiting cavity for the limiting plate 16 to slide;

[0057] An electric push rod 10 is fixed at the bottom of the body 1, and a linkage plate 11 is connected to the telescopic end of the electric push rod 10, and the linkage plate 11 is connected to the moving seat 12. The vertical movement of the milling cutter 8 is achieved through the telescopic action of the electric push rod 10, and the limit assembly ensures the precise position of the milling cutter 8 during the working process;

[0058] Starting the equipment: the operator starts the engine 2, and the engine 2 drives the milling cutter 8 to rotate through the transmission shaft 9;

[0059] Adjust the position of the milling cutter 8: adjust the distance between the milling cutter 8 and the ground through the telescopic action of the electric push rod 10 to ensure that the cutting depth meets the requirements;

[0060] Start cutting: the operator pushes the equipment to the road surface to be cut, and the milling cutter 8 starts cutting;

[0061] Completion of cutting: After the cutting is completed, the operator turns off the engine 2 and moves the equipment to the next work point.

[0062] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit thereof, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Milling cutter type pavement crack expansion machine, characterized in that: include: A machine body (1), an engine (2) is installed on the top of the machine body (1), a transmission shaft (9) is connected to the output end of the engine (2), and a milling cutter (8) is arranged at the bottom of the transmission shaft (9); A dust suction mechanism (3), the dust suction mechanism (3) being located between the machine body (1) and the milling cutter (8) and being used to absorb dust generated during the cutting process; A blower mechanism (4), the blower mechanism (4) being located on one side of the machine body (1) and used to blow the ground to be cut by wind; and an adjusting mechanism, the adjusting mechanism being located between the transmission shaft (9) and the milling cutter (8) and being used to adjust the distance between the milling cutter (8) and the ground, the adjusting mechanism comprising a telescopic component, a limiting component and a connecting component, the connecting component being located between the transmission shaft (9) and the milling cutter (8) and being used to connect the transmission shaft (9) and the milling cutter (8), the limiting component being located inside the connecting component and being used to limit the milling cutter (8) during operation, the telescopic component being located between the machine body (1) and the limiting component and being used to control the milling cutter (8) to move vertically.

2. The milling cutter type pavement crack expanding machine according to claim 1, characterized in that: The connecting assembly comprises a mounting seat (14) mounted on the top of the milling cutter (8) and a receiving groove opened inside the transmission shaft (9); a linkage shaft (15) is fixed on the top of the mounting seat (14); the linkage shaft (15) corresponds to the receiving groove; a plurality of evenly distributed slide bars are fixed on the outer wall of the linkage shaft (15); and a plurality of slide grooves for the slide bars to slide are opened on the outer wall of the receiving groove.

3. The milling cutter type pavement crack expanding machine according to claim 2, characterized in that: The limit assembly comprises a movable seat (12) sleeved on the outer wall of a mounting seat (14); the top of the movable seat (12) is connected to the bottom of a linkage shaft (15); a limit plate (16) is fixed to the outer wall of the mounting seat (14); and a limit cavity is provided inside the movable seat (12) for the limit plate (16) to slide.

4. The milling cutter type pavement crack expanding machine according to claim 3, characterized in that: The telescopic assembly comprises an electric push rod (10) fixed at the bottom of a machine body (1); the telescopic end of the electric push rod (10) is connected to a linkage plate (11); the linkage plate (11) is connected to a moving seat (12); a moving plate is fixed to a side of the moving seat (12) corresponding to the linkage plate (11); a linkage rod (13) is fixed to the top of the moving plate; and the linkage rod (13) is plugged into the machine body (1).

5. The milling cutter type pavement crack expanding machine according to claim 1, characterized in that: An armrest (6) is fixed to the top of the machine body (1), a plurality of evenly distributed support columns are fixed to the top of the armrest (6), a push plate is commonly fixed to the tops of the plurality of support columns, a handle (5) is installed on one side of the push plate, and a moving wheel (7) is installed at the bottom of the machine body (1).

6. The milling cutter type pavement crack expanding machine according to claim 1, characterized in that: The dust collecting mechanism (3) comprises a dust collector (31) fixed on the top of the machine body (1); the output end of the dust collector (31) is connected to an air inlet pipe (34); one end of the air inlet pipe (34) is connected to a directional pipe (32); and one side of the directional pipe (32) is provided with a wrapping component for wrapping the milling cutter (8); The wrapping assembly comprises a U-shaped support plate (33) connected to one side of the pointing tube (32), the U-shaped support plate (33) being sleeved on the outer wall of the milling cutter (8), and a plurality of evenly distributed suction heads (35) being connected to the inner side of the U-shaped support plate (33), and a reinforcing plate (36) being fixed to the top of the U-shaped support plate (33), and the reinforcing plate (36) being connected to the machine body (1).

7. The milling cutter type pavement crack expanding machine according to claim 1, characterized in that: The blowing mechanism (4) comprises a blower (41) arranged at the bottom of the machine body (1); an air outlet end of the blower (41) is connected to an air outlet pipe (44); the air outlet pipe (44) corresponds to the ground, and a filter (411) is installed inside the air outlet pipe (44); a reinforcement rod (49) is fixed to the bottom of the blower (41); a reinforcement sleeve (410) is fixed to one side of the reinforcement rod (49); the reinforcement sleeve (410) is sleeved on the outer wall of the air outlet pipe (44); and a disassembly component for disassembling the blower (41) is arranged between the blower (41) and the machine body (1).

8. The milling cutter type pavement crack expanding machine according to claim 7, characterized in that: The disassembly assembly comprises two mounting blocks (42) fixed on the top of the blower (41), the two mounting blocks (42) being plugged into the body (1), a fixing groove being provided on one side of the body (1), a movable sleeve being provided inside the fixing groove, an insertion rod (48) being fixed on one side of the movable sleeve, the insertion rod (48) being plugged into the two mounting blocks (42), an extrusion spring (43) being connected between the movable sleeve and the fixing groove, a movable rod (46) being fixed on one side of the movable sleeve, the extrusion spring (43) being sleeved on the outer wall of the movable rod (46), and a control panel (47) being fixed on one side of the movable sleeve; A fixing plate (45) is installed at the bottom of the machine body (1), and a plug plate (412) is fixed on one side of the blower (41), and the plug plate (412) is plugged into the fixing plate (45).

9. The milling cutter type pavement crack expanding machine according to claim 2, characterized in that: A tool seat (19) is fixed on the top of the milling cutter (8), and grooves are provided on both sides of the interior of the mounting seat (14). A positioning plate is installed inside the groove, and blocks are fixed on both sides of the positioning plate. Moving cavities for the block to move are provided on both sides of the groove, and a limiting spring (20) is connected between the positioning plate and the groove. Blocks are inserted on both sides of the tool seat (19), and a baffle (17) is fixed on one side of the plug. A limiting ring (18) for limiting the baffle (17) is provided on the outer wall of the mounting seat (14), and the block cooperates with the limiting ring (18).

10. A milling cutter-type pavement crack expansion method, characterized in that: The method is implemented by using a milling cutter-type pavement crack expander as described in any one of claims 1 to 9, comprising the following steps: S100: Starting the equipment: The operator starts the engine 2, and the engine 2 drives the milling cutter 8 to rotate through the transmission shaft 9; S200: Adjust the position of the milling cutter 8: adjust the distance between the milling cutter 8 and the ground through the telescopic action of the electric push rod 10 to ensure that the cutting depth meets the requirements; S300: Start cutting: The operator pushes the device to the road surface to be cut, and the milling cutter 8 starts cutting; S400: Cutting completed: After cutting is completed, the operator turns off the engine 2 and moves the equipment to the next operation point.

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