Road and bridge pavement maintenance device

By designing a pavement maintenance device that includes a base, slide, fixed seat, cutting part and dust reduction components, the problems of uneven areas after cutting and dust diffusion are solved, and the flatness of the cutting area and no dust diffusion are achieved, ensuring the close integration of the filling materials and environmental protection.

CN223189553UActive Publication Date: 2025-08-05ZHONGLU ZONGHENG (SHANXI) TRANSPORTATION TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202422463043.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-12
Publication Date
2025-08-05
Estimated Expiration
2034-10-12

AI Technical Summary

Technical Problem

The prior art is difficult to ensure the smoothness and cleanness of the cutting area when cutting roads and bridge pavements, and effectively control the diffusion of dust, affecting the bonding effect of subsequent filling materials and environmental protection.

Method used

A pavement maintenance device including a base, slide, fixed seat, cutting part and dust reduction assembly is designed to ensure the flatness of the cutting area by adjusting the width and depth of the blade set, and to control dust with the dust reduction assembly, including direct nozzles and atomization nozzles, to achieve cooling and dust control.

Benefits of technology

The flatness of the cutting area and no dust diffusion are achieved, ensuring the close integration of the filling materials, reducing the risk of air pollution, and protecting the environment and pedestrian health.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a road and bridge pavement maintenance device, which relates to the technical field of pavement maintenance devices and comprises a base, a sliding seat, a fixed seat, a cutting piece and a dust falling component. According to the road and bridge pavement maintenance device, the vertical position of the cutting piece can be adjusted to control the cutting depth, the smoothness of a cutting area is guaranteed by limiting transverse movement of the cutting piece, filling is tighter when pavement filling is carried out on the area later, a blocking cover is rotated to surround the cutting piece, water is injected into a main water pipe through an external water pipe, and the cutting piece can be conveniently and rapidly cut. Water flow enters the straight nozzles and the atomizing nozzles through the water pipes on the sides, one part of the water flow sprayed by the straight nozzles is sprayed to the blade set to cool the blade set, and the other part of the water flow is blocked by the baffle, flows into the cutting area again through the upper surface of the supporting plate and flushes the notch area cut by the blade set, and it is guaranteed that the notch area is free of chippings; the atomizing nozzles located at the two ends spray water mist, and flying dust generated by cutting can be prevented from being diffused outwards.
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Description

Technical Field

[0001] The utility model relates to the technical field of pavement maintenance devices, in particular to a road and bridge pavement maintenance device. Background Art

[0002] Over time, roads and bridge pavements can develop cracks or damage due to wear and tear from frequent vehicle traffic, temperature fluctuations, expansion and contraction caused by rainwater infiltration, and other factors. If not repaired promptly, the damaged area will continue to expand, further damaging the roadbed and structure, leading to more serious damage. Furthermore, uneven pavement can cause vehicles to jolt during driving, increasing the probability of traffic accidents. A common maintenance and repair method involves cutting and cleaning the damaged area and then refilling it. Cutting and removing the damaged area clearly identifies the damage area, ensuring effective adhesion of the new fill material, and restoring the pavement's bearing capacity.

[0003] When cutting damaged areas, ensuring the flatness and cleanliness of the cut area will help the filling material to effectively combine with the surrounding road surface. The flat surface without impurities makes the filling material more evenly distributed, reducing the possibility of falling off and peeling. During the cutting process, controlling the spread of dust will help protect the surrounding environment and the health of pedestrians and reduce air pollution. Utility Model Content

[0004] The utility model provides a road and bridge pavement maintenance device, which realizes the effects of ensuring the flatness and cleanliness of the area after cutting and controlling the diffusion of dust during the cutting process proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a road and bridge pavement maintenance device, comprising a base, a sliding seat, a fixed seat, a cutting piece and a dust reduction component, the upper surface of the base is provided with a built-in groove, the sliding seat is slidably connected to the built-in groove, the side of the sliding seat is fixedly connected to the side plate, the lower surface of the sliding seat is fixedly connected to the threaded sleeve, the position where the sliding seat is provided with the threaded sleeve is provided with a through hole, the upper surface of the sliding seat is fixedly connected to the sliding column, one end of the fixed seat is fixedly connected to the end tube, the end tube is rotatably connected to a threaded rod, the threaded rod and the threaded sleeve are threadedly connected, the fixed seat and the sliding column are slidably connected, and the fixed seat is connected to the The threaded rod moves synchronously, a motor is provided inside the fixed seat, the cutting piece is provided on the output shaft of the motor, a dust reduction assembly is provided at one end of the base, the dust reduction assembly includes a baffle, a fixed plate and a main water pipe, the rotation of the baffle is connected to one end of the base, a plurality of straight nozzles are provided at the middle position of the inner side of the baffle, atomizing nozzles are respectively provided at both ends of the inner side of the baffle, a fixed plate is fixedly connected to the outer side of the baffle, a pipe seat is fixedly connected to the upper surface of the fixed plate, a main groove is opened inside the pipe seat, the main water pipe is provided in the main groove, a plurality of side water pipes are arranged along the length direction on the circumferential side of the main water pipe, and the plurality of side water pipes are respectively connected with the straight nozzle and the atomizing nozzle.

[0006] Preferably, the free end of the shield is fixedly connected to a collar, one end of the base is fixedly connected to an ear seat, a pin is provided in the collar, and the pin is inserted between the collar and the ear seat for fixation.

[0007] Preferably, both ends of the pipe seat are provided with main pipe clamping grooves, and both ends of the main water pipe are embedded and fixed in the main pipe clamping grooves. The side of the pipe seat is provided with side pipe clamping grooves, and the side pipes are embedded and fixed in the side pipe clamping grooves. One end of the main water pipe is provided with a water inlet.

[0008] Preferably, support plates are fixedly connected to both sides of the bottom end of the base, the upper surface of the support plate is an inclined surface inclined toward the outside and downward, and a baffle is fixedly connected to the upper surface of the support plate on one side of the baffle.

[0009] Preferably, a side groove is formed through the side surface of the base, the side groove is communicated with the built-in groove, and the upper and lower sides of the side groove are fixedly connected with slide rails.

[0010] Preferably, rollers are rotatably connected to both sides of the slide seat, wheel grooves are provided on the peripheral side surfaces of the rollers, and the slide rails are embedded in the wheel grooves.

[0011] Preferably, an annular groove is opened inside the end tube, and a limiting ring is fixedly connected to the circumferential side surface of the threaded rod. The limiting ring is embedded in the annular groove of the end tube, and the threaded rod is rotatably connected to the end tube through the limiting ring.

[0012] Preferably, the cutting member includes a sleeve, a blade group and a nut plate, the sleeve is fixed on the output shaft of the motor, a clamping plate is fixedly connected to the circumference of one end of the sleeve, the blade group is sleeved on the circumference of the sleeve, the nut plate is threadedly connected to the free end of the sleeve, the blade group is composed of a plurality of blades stacked together, and the blade group is clamped and fixed between the clamping plate of the sleeve and the nut plate.

[0013] Preferably, the other end of the fixing seat is fixedly connected to a shaft sleeve, and the output shaft of the motor passes through the shaft sleeve.

[0014] Preferably, a push rod is fixedly connected to one side of the side plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. Adjust the number of overlapping blades according to the width of the crack or damage in the area to be cut, change the width of the blade group, so that the width of the cutting by the blade group completely covers the horizontal lines of the crack, start the motor to drive the blade group to rotate at high speed for cutting, turn the turntable at the upper end of the threaded rod to make the threaded rod rotate in the end tube, and through the action of the thread, make the threaded rod move vertically up and down in the threaded sleeve. By embedding the limit ring in the annular groove inside the end tube, the threaded rod can move vertically along the threaded sleeve, driving the fixed seat to move synchronously along the sliding column, thereby achieving the function of controlling the cutting depth.

[0017] 2. Push the slide to slide along the built-in groove of the slide, and at the same time, the roller rolls along the slide rail in the side groove to reduce the sliding resistance between the slide and the base. At the same time, the roller is clamped between the two sets of slide rails through the wheel groove to limit the lateral movement of the slide, ensuring the flatness of the cutting area, so that when the road surface is filled in the area later, the filling is tighter.

[0018] 3. Rotate the shield to align the collar with the ear seat, insert the pin in the center space between the collar and the ear seat to fix the shield on the base. At this time, the shield will enclose the cutting piece, connect an external water pipe to the water inlet, and inject water into the main water pipe through the external water pipe. The water flows into the straight nozzle and the atomizing nozzle through the water pipes on each side. Part of the water jetted by the straight nozzle is sprayed on the blade group to cool the blade group, and the other part is blocked by the baffle and flows back into the cutting area through the upper surface of the support plate to rinse the notch area cut by the blade group to ensure that there is no debris in the notch area. The atomizing nozzles at both ends spray water mist to limit the dust generated by cutting from spreading to the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the road and bridge pavement maintenance device of the present utility model;

[0020] Figure 2 This is a structural schematic diagram of the shield of the utility model in a state to be fixed;

[0021] Figure 3 This is a schematic diagram of the structure of the matching baffle and the fixing plate of the utility model;

[0022] Figure 4 This is a cross-sectional view of the connection between the base and the slide seat of the present invention;

[0023] Figure 5 for Figure 4 A magnified view of point A;

[0024] Figure 6 for Figure 4 Enlarged view of point B;

[0025] Figure 7 This is a structural diagram of the roller installation position of the utility model;

[0026] Figure 8 This is a structural diagram of the ear seat installation position of the utility model.

[0027] Numbers in the figure: 1. base; 11. built-in groove; 12. side groove; 121. slide rail; 13. support plate; 14. baffle; 15. ear seat; 2. slide seat; 21. side plate; 211. threaded sleeve; 22. slide column; 23. push rod; 3. roller; 31. wheel groove; 4. fixed seat; 41. end tube; 42. threaded rod; 421. limit ring; 43. motor; 431. bushing; 5. cutting piece; 51. sleeve; 52. blade assembly; 53. nut plate; 6. baffle; 61. collar; 611. pin; 62. straight nozzle; 63. atomizing nozzle; 7. fixed plate; 71. pipe seat; 711. main groove; 712. main pipe clamp groove; 713. side pipe clamp groove; 8. main water pipe; 81. side water pipe; 82. water inlet. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0029] The utility model provides a road and bridge pavement maintenance device, such as Figure 1 and Figure 2 As shown, it includes a base 1, a slide 2, a fixed seat 4, a cutting piece 5 and a dust reduction component, as shown Figure 4 As shown, the upper surface of the base 1 is provided with a built-in groove 11, the slide 2 is slidably connected to the built-in groove 11, and the side of the base 1 is penetrated by a side groove 12, which is connected to the built-in groove 11. Figure 7 As shown, the upper and lower sides of the side groove 12 are fixedly connected with slide rails 121. Figure 8 As shown, rollers 3 are rotatably connected to both sides of the slide 2. Wheel grooves 31 are formed on the circumferential sides of the rollers 3, and slide rails 121 are embedded in the wheel grooves 31. When the slide 2 is pushed to slide along the built-in grooves 11 of the slide 2, the rollers 3 roll along the slide rails 121 in the side grooves 12, reducing the sliding resistance between the slide 2 and the base 1. At the same time, the rollers 3 are clamped between the two sets of slide rails 121 through the wheel grooves 31, limiting the lateral movement of the slide 2, ensuring the flatness of the cutting area, and making the road surface filling in the area more compact.

[0030] like Figure 5 and Figure 8 As shown, the side of the slide 2 is fixedly connected to the side plate 21, the lower surface of the slide 2 is fixedly connected to the threaded sleeve 211, the position where the slide 2 is provided with the threaded sleeve 211 is provided with a through hole, the upper surface of the slide 2 is fixedly connected to the slide post 22, one side of the side plate 21 is fixedly connected to the push rod 23, one end of the fixed seat 4 is fixedly connected to the end tube 41, the threaded rod 42 and the threaded sleeve 211 are threadedly connected, and the fixed seat 4 and the slide post 22 are slidably connected, as shown in FIG. Figure 6As shown, an annular groove is formed inside the end tube 41, and a limiting ring 421 is fixedly connected to the circumferential side surface of the threaded rod 42. The limiting ring 421 is embedded in the annular groove of the end tube 41, and the threaded rod 42 is rotatably connected to the end tube 41 through the limiting ring 421. The fixing seat 4 moves synchronously with the threaded rod 42 through the end tube 41. The turntable at the upper end of the threaded rod 42 is rotated to rotate the threaded rod 42 in the end tube 41, and the threaded rod 42 is vertically moved up and down in the threaded sleeve 211 through the action of the thread. The threaded rod 42 is embedded in the annular groove inside the end tube 41, so that when the threaded rod 42 moves vertically along the threaded sleeve 211, it drives the fixing seat 4 to move synchronously along the slide column 22, thereby achieving the function of controlling the cutting depth.

[0031] like Figure 5 As shown, a motor 43 is provided inside the fixed seat 4, and the cutting piece 5 is provided on the output shaft of the motor 43. The other end of the fixed seat 4 is fixedly connected to a sleeve 431, and the output shaft of the motor 43 passes through the sleeve 431. The sleeve 431 supports the output shaft of the motor 43. The cutting piece 5 includes a sleeve 51, a blade group 52 and a nut plate 53. The sleeve 51 is fixed on the output shaft of the motor 43, and a splint is fixedly connected to the circumference of one end of the sleeve 51. The blade group 52 is sleeved on the circumference of the sleeve 51, and the nut plate 53 is threadedly connected to the free end of the sleeve 51. The blade group 52 is composed of a plurality of blades stacked together, and the blade group 52 is clamped and fixed between the splint of the sleeve 51 and the nut plate 53. Adjust the number of overlapping blades according to the width of the crack or damage in the area to be cut, change the width of the blade group 52, so that the width of the cutting by the blade group 52 completely covers the transverse lines of the crack. After the blade group 52 is sleeved on the blade group 52, tighten the nut plate 53 to move it along the sleeve 51, and clamp the blade group 52 between the clamping plate of the sleeve 51 and the nut plate 53. For cracks or damaged areas with too wide a transverse width, after cutting a groove of a certain width, the entire device can be translated laterally to cut the uncut cracks or damaged areas.

[0032] like Figure 1 and Figure 2 As shown, a dust suppression component is provided at one end of the base 1, and the dust suppression component includes a baffle 6, a fixing plate 7 and a main water pipe 8. The baffle 6 is rotatably connected to one end of the base 1, and the free end of the baffle 6 is fixedly connected to a collar 61. One end of the base 1 is fixedly connected to an ear seat 15, and a pin 611 is provided in the collar 61. The pin 611 is inserted between the collar 61 and the ear seat 15 for fixing. A plurality of straight nozzles 62 are provided at the middle position of the inner side of the baffle 6, and atomizing nozzles 63 are respectively provided at the inner ends of the baffle 6. The outer side of the baffle 6 is fixedly connected to the fixing plate 7, and the upper surface of the fixing plate 7 is fixedly connected to the pipe seat 71, as shown Figure 3As shown, a main groove 711 is provided inside the pipe seat 71, and the main water pipe 8 is arranged in the main groove 711. A plurality of side water pipes 81 are arranged on the peripheral side of the main water pipe 8 along the length direction. The plurality of side water pipes 81 are respectively connected to the straight nozzle 62 and the atomizing nozzle 63. Both ends of the pipe seat 71 are provided with main pipe clamping grooves 712, and both ends of the main water pipe 8 are embedded and fixed in the main pipe clamping grooves 712. A side pipe clamping groove 713 is provided on the side of the pipe seat 71, and the side pipes are embedded and fixed in the side pipe clamping grooves 713. A water inlet pipe port 82 is provided at one end of the main water pipe 8. Rotate the shield 6 so that the collar 61 is aligned with the ear seat 15, and insert the pin 611 into the center space between the collar 61 and the ear seat 15 to fix the shield 6 on the base 1. At this time, the shield 6 will enclose the cutting piece 5, and an external water pipe is connected to the water inlet pipe 82. Water is injected into the main water pipe 8 through the external water pipe. The water flows into the straight nozzle 62 and the atomizing nozzle 63 through the side water pipes 81. The straight nozzle 62 sprays water into the cutting area to flush the slot area cut by the blade group 52 to ensure that there is no debris in the slot area. The atomizing nozzles 63 at both ends spray water mist to limit the dust generated by cutting from spreading to the outside.

[0033] like Figure 2 and Figure 5 As shown, support plates 13 are fixedly connected to both sides of the bottom end of the base 1. The upper surface of the support plate 13 is an inclined surface that tilts outward and downward. A baffle 14 is fixedly connected to the upper surface of the support plate 13 on the side of the baffle 6. Part of the water flow sprayed by the straight nozzle 62 is sprayed on the blade assembly 52 to cool the blade assembly 52, and the other part is blocked by the baffle 14 and flows back into the cutting area through the upper surface of the support plate 13.

[0034] Adopting this utility model, such as Figure 1 and Figure 2As shown, place the device on the road surface so that the side of the base 1 with the baffle 14 is close to the cracked or damaged location, and align the edge of the side support plate 13 with the outermost edge of the crack or damaged location. For irregular cracks, align it with the position where the crack lines protrude the furthest. Adjust the number of overlapping blades according to the width of the crack or damage in the area to be cut, change the width of the blade group 52, so that the width of the blade group 52 cuts completely covers the horizontal lines of the crack. After the blade group 52 is sleeved on the blade group 52, tighten the nut plate 53 to move it along the sleeve 51, clamp the blade group 52 between the clamping plate of the sleeve 51 and the nut plate 53, start the motor 43 to drive the blade group 52 to rotate at high speed for cutting. Rotate the shield 6 so that the collar 61 is aligned with the ear seat 15, and insert the pin 611 into the center space between the collar 61 and the ear seat 15 to fix the shield 6 on the base 1. At this time, the shield 6 encloses the cutting piece 5, and an external water pipe is connected to the water inlet pipe 82. Water is injected into the main water pipe 8 through the external water pipe, and the water flows into the straight nozzle 62 and the atomizing nozzle 63 through the side water pipes 81. Part of the water flow sprayed by the straight nozzle 62 is sprayed on the blade group 52 to cool the blade group 52, and the other part is blocked by the baffle 14 and flows back into the cutting area through the upper surface of the support plate 13 to rinse the notch area cut by the blade group 52 to ensure that there is no debris in the notch area. The atomizing nozzles 63 at both ends spray water mist to limit the dust generated by cutting from spreading to the outside. Rotating the turntable at the upper end of the threaded rod 42 causes the threaded rod 42 to rotate within the end tube 41. The threaded rod 42 is then moved vertically up and down within the threaded sleeve 211 by means of the threaded rod 42. By inserting the limiting ring 421 into the annular groove within the end tube 41, the threaded rod 42 is able to move vertically along the threaded sleeve 211, thereby driving the fixed seat 4 to move synchronously along the slide post 22, thereby controlling the cutting depth. The slide 2 is pushed to slide along the built-in groove 11 of the slide 2. Simultaneously, the roller 3 rolls along the slide rail 121 in the side groove 12, reducing the sliding resistance between the slide 2 and the base 1. The roller 3 is engaged between the two sets of slide rails 121 via the wheel groove 31, limiting the lateral movement of the slide 2, ensuring the smoothness of the cutting area and allowing for a tighter filling when the road surface is subsequently filled in the area. For cracks or damages longer than the base 1, after cutting one section of the crack or damage, the device is moved along the extension direction of the crack, and the above operation is repeated to cut the remaining sections of the crack or damage.

[0035] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A road and bridge pavement maintenance device, characterized in that: The utility model comprises a base (1), a slide seat (2), a fixed seat (4), a cutting piece (5) and a dust reduction component, wherein the upper surface of the base (1) is provided with a built-in groove (11), the slide seat (2) is slidably connected in the built-in groove (11), the side surface of the slide seat (2) is fixedly connected with a side plate (21), the lower surface of the slide seat (2) is fixedly connected with a threaded sleeve (211), a through hole is provided at the position where the threaded sleeve (211) is provided on the slide seat (2), the upper surface of the slide seat (2) is fixedly connected with a slide column (22), the fixed seat (4) is fixedly connected with a side plate (211), and the lower surface of the slide seat (2) is fixedly connected with a side plate (211). One end of the base (1) is fixedly connected to an end tube (41), a threaded rod (42) is rotatably connected inside the end tube (41), the threaded rod (42) and the threaded sleeve (211) are threadedly connected, the fixed seat (4) and the sliding column (22) are slidably connected, the fixed seat (4) moves synchronously with the threaded rod (42) through the end tube (41), a motor (43) is provided inside the fixed seat (4), the cutting member (5) is provided on the output shaft of the motor (43), and a dust reduction component is provided at one end of the base (1); The dust suppression component comprises a shield (6), a fixing plate (7) and a main water pipe (8); the shield (6) is rotatably connected to one end of the base (1); a plurality of straight nozzles (62) are provided at the middle position of the inner side of the shield (6); atomizing nozzles (63) are provided at both ends of the inner side of the shield (6); the outer side of the shield (6) is fixedly connected to the fixing plate (7); the upper surface of the fixing plate (7) is fixedly connected to the pipe seat (71); a main groove (711) is provided inside the pipe seat (71); the main water pipe (8) is provided in the main groove (711); a plurality of side water pipes (81) are arranged on the peripheral side of the main water pipe (8) along the length direction; the plurality of side water pipes (81) are respectively connected to the straight nozzle (62) and the atomizing nozzle (63).

2. A road and bridge pavement maintenance device according to claim 1, characterized in that: The free end of the shield (6) is fixedly connected to a collar (61), one end of the base (1) is fixedly connected to an ear seat (15), a pin (611) is provided in the collar (61), and the collar (61) and the ear seat (15) are fixed by inserting the pin (611) therebetween.

3. A road and bridge pavement maintenance device according to claim 1, characterized in that: Both ends of the pipe seat (71) are provided with main pipe clamping grooves (712), and both ends of the main water pipe (8) are embedded and fixed in the main pipe clamping grooves (712). The side of the pipe seat (71) is provided with side pipe clamping grooves (713), and the side pipe is embedded and fixed in the side pipe clamping grooves (713). One end of the main water pipe (8) is provided with a water inlet pipe port (82).

4. A road and bridge pavement maintenance device according to claim 1, characterized in that: Support plates (13) are fixedly connected to both sides of the bottom end of the base (1), the upper surface of the support plate (13) is an inclined surface inclined toward the outside and downward, and the upper surface of the support plate (13) located on one side of the baffle (6) is fixedly connected to a baffle (14).

5. The road and bridge pavement maintenance device according to claim 1, characterized in that: A side groove (12) is provided through the side of the base (1), the side groove (12) is connected to the built-in groove (11), and the upper and lower sides of the side groove (12) are fixedly connected to slide rails (121).

6. A road and bridge pavement maintenance device according to claim 5, characterized in that: Both sides of the slide seat (2) are rotatably connected to rollers (3), a wheel groove (31) is provided on the peripheral side surface of the roller (3), and the slide rail (121) is embedded in the wheel groove (31).

7. The road and bridge pavement maintenance device according to claim 1, characterized in that: An annular groove is provided inside the end tube (41), and a limiting ring (421) is fixedly connected to the peripheral side surface of the threaded rod (42). The limiting ring (421) is embedded in the annular groove of the end tube (41), and the threaded rod (42) is rotatably connected to the end tube (41) through the limiting ring (421).

8. The road and bridge pavement maintenance device according to claim 1, characterized in that: The cutting member (5) comprises a sleeve (51), a blade group (52) and a nut plate (53); the sleeve (51) is fixed on the output shaft of the motor (43); a clamping plate is fixedly connected to the circumference of one end of the sleeve (51); the blade group (52) is sleeved on the circumference of the sleeve (51); the nut plate (53) is threadedly connected to the free end of the sleeve (51); the blade group (52) is composed of a plurality of blades stacked together, and the blade group (52) is clamped and fixed between the clamping plate of the sleeve (51) and the nut plate (53).

9. The road and bridge pavement maintenance device according to claim 1, characterized in that: The other end of the fixing seat (4) is fixedly connected to a shaft sleeve (431), and the output shaft of the motor (43) passes through the shaft sleeve (431).

10. The road and bridge pavement maintenance device according to claim 1, characterized in that: A push rod (23) is fixedly connected to one side of the side plate (21).