Road surface compacting device for road and bridge engineering

Abstract

The invention provides a road surface compaction device for road and bridge engineering, and belongs to the technical field of road and bridge engineering, the road surface compaction device comprises a roller, a bracket, a driving assembly, a vibration excitation assembly and an air entraining assembly, the bracket is of a U-shaped structure, a supporting shaft is rotatably arranged on the inner side of the bracket, and the outer side of the bracket is connected with an external traction vehicle; the supporting shaft penetrates through the roller and is in running fit with the roller, the shock excitation assembly is installed on a shaft body, located in the roller, of the supporting shaft, and the driving assembly is arranged on the side wall in the roller. Compared with the prior art, in the embodiment of the invention, when the driving assembly drives the vibration excitation assembly to vibrate so as to compact the pavement asphalt, the air entraining assembly is used for entraining the outside air to enable the outside air to penetrate through the interior of the roller, so that the roller is cooled, the working time of the roller is prolonged, and the compaction efficiency of the pavement asphalt is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of road and bridge engineering, and specifically relates to a pavement compaction device for road and bridge engineering. Background Art

[0002] Currently, during the construction stage of road and bridge subgrades, it is often necessary to lay asphalt on the road surface of the construction project. During the laying process, a roller is often used to compact the asphalt to improve the flatness of the asphalt road surface.

[0003] When the existing roller works, it relies on an external towing vehicle to drive the drum to roll on the road surface, and a vibration excitation structure inside the drum applies a vibration force to the drum. This vibration force is transmitted to the road surface asphalt to achieve the vibration compaction of the asphalt. However, since the roller drum is relatively enclosed, the heat generated during the operation of the vibration excitation structure is not easily dissipated from the inside of the drum. At the same time, coupled with the relatively high temperature of the asphalt itself, the action of the drum on the asphalt will also cause the temperature inside the drum to rise. Therefore, the existing roller cannot work continuously for a long time, which affects the compaction efficiency of the road surface asphalt. Summary of the Invention

[0004] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the embodiments of the present invention is to provide a pavement compaction device for road and bridge engineering.

[0005] To solve the above technical problem, the present invention provides the following technical solutions: A pavement compaction device for road and bridge engineering, including a drum, a bracket, a drive assembly, a vibration excitation assembly, and an air intake assembly. The bracket is in a U-shaped structure. A support shaft is rotatably provided inside the bracket. The outside of the bracket is connected to an external towing vehicle. The support shaft penetrates through the drum and is rotationally matched with the drum. The vibration excitation assembly is installed on the shaft body of the support shaft located inside the drum. The drive assembly is arranged on the inner side wall of the drum. When the drum rolls along the road surface, the drive assembly drives the vibration excitation assembly to vibrate and impact the inner wall of the drum to achieve the vibration compaction of the road surface asphalt. The air intake assembly is arranged inside the drum. When the vibration excitation assembly vibrates, the air intake assembly is used to draw in external air and make the external air pass through the inside of the drum to achieve the cooling of the drum.

[0006] As a further improvement of the present invention: The drive assembly includes a plurality of push blocks. A plurality of the push blocks are installed on the inner side wall of the drum. The plurality of push blocks are annularly and spacedly distributed on the inner wall side of the drum. A first inclined surface is provided on the left side wall of each group of push blocks. The vibration excitation assembly includes a vibration excitation block, a connecting rod, a support seat, an elastic member, and a push rod. The lower end of the connecting rod is fixedly connected to the excitation block, and the upper end is fixedly connected to the support seat. The elastic member is arranged on the upper part of the support seat and is used to provide elastic support for the support seat, so that the excitation block contacts the inner bottom wall of the drum. One end of the push rod is fixedly connected to the support seat, and the other end extends between two adjacent groups of the push blocks.

[0007] As a further improvement of the present invention: rotating shafts are rotatably arranged on several of the push blocks, the rotating shafts are fixedly installed on the inner wall of the drum, and second inclined surfaces are arranged on the right side walls of each group of the push blocks. Arc-shaped sliding grooves are formed in each group of the push blocks, and limiting blocks are movably arranged inside each group of the arc-shaped sliding grooves. The limiting blocks are fixedly installed on the inner wall of the drum.

[0008] As a further improvement of the present invention: the center of the arc-shaped sliding groove coincides with the center of the rotating shaft.

[0009] As a further improvement of the present invention: an air inlet channel is arranged at one end inside the support shaft, and an air exhaust channel is arranged at the other end. The air inlet channel and the air exhaust channel are not communicated with each other. An air outlet pipe and air exhaust holes are arranged on the shaft body of the support shaft located inside the drum. The air outlet pipe is communicated with the air inlet channel, the air exhaust holes are communicated with the air exhaust channel, and one-way valves are arranged inside both the air outlet pipe and the air inlet channel. The air guiding assembly includes a piston rod and a piston sleeve. The piston sleeve is fixedly arranged at the bottom of the support shaft and is communicated with the air inlet channel. The upper end of the piston rod extends into the piston sleeve and is in telescopic fit with the piston sleeve, and the lower end extends below the piston sleeve and is fixedly connected to the support seat. One end of the elastic member is connected to the support seat, and the other end is connected to the piston sleeve.

[0010] As a further improvement of the present invention: the elastic member is a spring or a metal elastic sheet.

[0011] As a further improvement of the present invention: several groups of the excitation assembly and the air guiding assembly are arranged at intervals along the length direction of the support shaft inside the drum, and the support seats corresponding to two adjacent groups of the excitation assemblies are fixedly connected by a linkage rod.

[0012] Compared with the prior art, the beneficial effects of the present invention are: In an embodiment of the present invention, when it is necessary to compact the road surface asphalt, the operator drives a towing vehicle to travel along the road surface. The towing vehicle drives a roller to roll along the road surface through a bracket. At this time, the roller presses the road surface to preliminarily compact the road surface asphalt. While the roller rolls along the road surface, the driving component can also drive the vibration exciting component to vibrate inside the roller and impact the inner wall of the roller. The roller transmits the impact force to the road surface asphalt, thereby realizing further compaction of the road surface asphalt; when the vibration exciting component vibrates as described above, the air guiding component can draw in external air and make the external air pass through the inside of the roller, thereby performing a cooling treatment on the roller to prevent the temperature inside the roller from being too high, so as to ensure that the roller can compact the road surface asphalt for a long time, thereby improving the compaction efficiency of the road surface asphalt. Compared with the prior art, when the driving component drives the vibration exciting component to vibrate to compact the road surface asphalt, the air guiding component draws in external air to make the external air pass through the inside of the roller, thereby realizing the cooling of the roller, and further extending the working duration of the roller and improving the compaction efficiency of the road surface asphalt. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of a road surface compaction device for a road and bridge project; Figure 2 is a schematic internal structure diagram of a roller in a road surface compaction device for a road and bridge project Figure 1 ; Figure 3 is a schematic internal structure diagram of a roller in a road surface compaction device for a road and bridge project Figure 2 ; Figure 4 is Figure 2 an enlarged schematic diagram of area A in In the figure: 10 - roller, 20 - bracket, 201 - support shaft, 202 - air inlet channel, 203 - air outlet channel, 204 - exhaust hole, 205 - air outlet pipe, 30 - driving component, 301 - push block, 302 - rotating shaft, 303 - arc-shaped sliding groove, 304 - limiting block, 40 - vibration exciting component, 401 - vibration exciting block, 402 - connecting rod, 403 - support seat, 404 - elastic member, 405 - push rod, 406 - linkage rod, 50 - air guiding component, 501 - piston rod, 502 - piston sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The technical solutions of the present invention will be further described in detail below in conjunction with the specific embodiments.

[0015] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0016] Please refer to Figure 1 、 Figure 2 and Figure 3 As shown in the figures, this embodiment provides a pavement compaction device for road and bridge engineering, which includes a drum 10, a bracket 20, a drive assembly 30, a vibration excitation assembly 40, and an air intake assembly 50. The bracket 20 has a U-shaped structure. A support shaft 201 is rotatably arranged inside the bracket 20. The outside of the bracket 20 is connected to an external towing vehicle (not shown in the figure). The support shaft 201 passes through the drum 10 and is rotatably engaged with the drum 10. The vibration excitation assembly 40 is installed on the shaft body of the support shaft 201 inside the drum 10. The drive assembly 30 is arranged on the inner side wall of the drum 10. When the drum 10 rolls along the road surface, the drive assembly 30 drives the vibration excitation assembly 40 to vibrate and impact the inner wall of the drum 10 to achieve vibration compaction of the road surface asphalt. The air intake assembly 50 is arranged inside the drum 10. When the vibration excitation assembly 40 vibrates, the air intake assembly 50 is used to draw in external air and make the external air pass through the inside of the drum 10 to achieve cooling of the drum 10.

[0017] When it is necessary to compact the road surface asphalt, the staff drives the towing vehicle to travel along the road surface. The towing vehicle drives the drum 10 to roll along the road surface through the bracket 20. At this time, the drum 10 presses the road surface to initially compact the road surface asphalt. While the drum 10 rolls along the road surface, the drive assembly 30 can also drive the vibration excitation assembly 40 to vibrate inside the drum 10 and impact the inner wall of the drum 10. The drum 10 transmits the impact force to the road surface asphalt, thereby achieving further compaction of the road surface asphalt. When the vibration excitation assembly 40 vibrates, the air intake assembly 50 can draw in external air and make the external air pass through the inside of the drum 10, and then perform a cooling treatment on the drum 10 to prevent the temperature inside the drum 10 from being too high, so as to ensure that the drum 10 can compact the road surface asphalt for a long time, thereby improving the compaction efficiency of the road surface asphalt.

[0018] Please refer to Figure 2 and Figure 4, in one embodiment, the driving assembly 30 includes a plurality of pushing blocks 301, the plurality of pushing blocks 301 are installed on the inner side wall of the drum 10, the plurality of pushing blocks 301 are annularly and spacedly distributed on the inner wall side wall of the drum 10, and a first inclined surface is provided on the left side wall of each group of pushing blocks 301. The vibration exciting assembly 40 includes a vibration exciting block 401, a connecting rod 402, a support seat 403, an elastic member 404 and a push rod 405. The lower end of the connecting rod 402 is fixedly connected to the vibration exciting block 401, and the upper end is fixedly connected to the support seat 403. The elastic member 404 is arranged on the upper part of the support seat 403 and is used to provide elastic support for the support seat 403 so that the vibration exciting block 401 contacts the inner bottom wall of the drum 10. One end of the push rod 405 is fixedly connected to the support seat 403, and the other end extends between two adjacent groups of pushing blocks 301.

[0019] For ease of understanding, several pushing blocks 301 are respectively named as the first pushing block, the second pushing block, the third pushing block... in sequence. Initially, the end of the push rod 405 away from the support base 403 extends between the first pushing block and the second pushing block. When the towing vehicle drives the roller 10 to roll along the road surface through the bracket 20, the roller 10 drives several pushing blocks 301 to rotate relative to the push rod 405. The end of the push rod 405 away from the support base 403 can act on the first inclined surface on the left side wall of the second pushing block and slide upward along the first inclined surface. When the push rod 405 slides upward, it drives the support base 403, the connecting rod 402, and the vibration exciter block 401 to move upward, causing the vibration exciter block 401 to separate from the inner bottom wall of the roller 10. At this time, the elastic member 404 is compressed under force. When the end of the push rod 405 away from the support base 403 slides off the first inclined surface on the left side wall of the second pushing block, the elastic member 404 pushes the support base 403, and then drives the connecting rod 402, the vibration exciter block 401, and the push rod 405 to move downward. The vibration exciter block 401 impacts the inner bottom wall of the roller 10, and the roller 10 transmits this impact force to the road surface asphalt to achieve the vibration compaction of the road surface asphalt. During this process, the push rod 405 moves downward and enters between the second pushing block and the third pushing block. As the roller 10 and several pushing blocks 301 continue to rotate, the first inclined surface on the left side wall of the third pushing block pushes the push rod 405 again, causing the push rod 405 to slide upward along the current first inclined surface again, and then driving the support base 403, the connecting rod 402, and the vibration exciter block 401 to move upward again. The elastic member 404 is compressed again. When the end of the push rod 405 away from the support base 403 slides off the first inclined surface on the left side wall of the third pushing block, the elastic member 404 pushes the support base 403 and then drives the vibration exciter block 401 and the push rod 405 to move downward again. The vibration exciter block 401 impacts the inner bottom wall of the roller 10 again to achieve the re-compaction of the road surface asphalt. At the same time, the end of the push rod 405 away from the support base 403 moves downward to between the third pushing block and the fourth pushing block... and so on in a cyclic manner. When the roller 10 rolls along the road surface, through the cooperation of several pushing blocks 301 and the elastic member 404, the up and down movement of the vibration exciter block 401 inside the roller 10 can be realized, that is, vibration occurs, and then the inner bottom wall of the roller 10 is repeatedly impacted to achieve the vibration compaction of the road surface asphalt.

[0020] Please refer to Figure 4 , in one embodiment, a rotating shaft 302 is rotatably provided on each of the several pushing blocks 301. The rotating shaft 302 is fixedly installed on the inner wall of the roller 10. A second inclined surface is provided on the right side wall of each group of pushing blocks 301. An arc-shaped chute 303 is provided on each of the several pushing blocks 301. A limiting block 304 is movably provided inside each arc-shaped chute 303. The limiting block 304 is fixedly installed on the inner wall of the roller 10.

[0021] Initially, the first inclined surfaces on the left side walls of several pushing blocks 301 face the inner direction of the drum 10, while the second inclined surfaces on the right side walls of the several pushing blocks 301 face the outer direction of the drum 10. When the drum 10 rolls along the road asphalt, the first inclined surfaces on the left side walls of the several pushing blocks 301 can push the push rod 405 upward, thereby driving the support seat 403 and the vibration exciter block 401 upward. At this time, the limit block 304 is located at one end inside the arc-shaped chute 303 to restrict the rotation of the pushing block 301, so that the pushing block 301 can be kept stable, and thus the first inclined surface can smoothly push the push rod 405 upward; when the drum 10 rolls to the end position of the road asphalt and needs to perform reverse rolling compaction on the road asphalt, the staff reverses the towing vehicle. The towing vehicle pulls the drum 10 through the bracket 20, so that the drum 10 rolls reversely along the road asphalt. At this time, the drum 10 drives the several pushing blocks 301 to rotate reversely relative to the push rod 405. One end of the push rod 405 away from the support seat 403 can act on the second inclined surfaces on the right side walls of the several pushing blocks 301 in sequence, thereby driving the several pushing blocks 301 to rotate relative to the corresponding rotating shafts 302 in sequence. At this time, the limit block 304 slides along the inside of the arc-shaped chute 303. When the limit block 304 slides to the other end inside the arc-shaped chute 303, the second inclined surfaces on the right side walls of the several pushing blocks 301 face the inner direction of the drum 10, while the first inclined surfaces on the left side walls of the several pushing blocks 301 face the outer direction of the drum 10, thus realizing the rotational transposition of the several pushing blocks 301. During and after the transposition of the several pushing blocks 301, the second inclined surfaces on the right side walls of the several pushing blocks 301 cooperate with the elastic member 404 to also drive the push rod 405, the support seat 403, and the vibration exciter block 401 to move up and down, so that the drum 10 can also perform vibration compaction on the road asphalt when rolling reversely along the road asphalt.

[0022] In one embodiment, the center of the arc-shaped chute 303 coincides with the center of the rotating shaft 302, so that when the push rod 405 acts on the second inclined surface on the right side wall of the pushing block 301, it can smoothly drive the pushing block 301 to rotate relative to the rotating shaft 302, and the limit block 304 will not restrict the rotation of the pushing block 301.

[0023] Please refer to Figure 2 and Figure 3, in one embodiment, an intake passage 202 is provided at one end inside the support shaft 201, and an exhaust passage 203 is provided at the other end. The intake passage 202 and the exhaust passage 203 are not in communication with each other. An air outlet pipe 205 and exhaust holes 204 are provided on the shaft body of the support shaft 201 located inside the drum 10. The air outlet pipe 205 is in communication with the intake passage 202, and the exhaust holes 204 are in communication with the exhaust passage 203. Check valves (not shown in the figure) are provided inside both the air outlet pipe 205 and the intake passage 202. The air guiding assembly 50 includes a piston rod 501 and a piston sleeve 502. The piston sleeve 502 is fixedly provided at the bottom of the support shaft 201 and is in communication with the intake passage 202. The upper end of the piston rod 501 extends into the piston sleeve 502 and is in telescopic cooperation with the piston sleeve 502, and the lower end extends below the piston sleeve 502 and is fixedly connected to the support base 403. One end of the elastic member 404 is connected to the support base 403, and the other end is connected to the piston sleeve 502.

[0024] When the first inclined surface or the second inclined surface on the push block 301 pushes the push rod 405 upward, thereby driving the vibration exciter block 401 and the support base 403 upward, the support base 403 can drive the piston rod 501 to move upward synchronously. The piston rod 501 moves into the piston sleeve 502. At this time, the elastic member 404 is compressed. At the same time, the check valve inside the air outlet pipe 205 is opened, and the check valve inside the intake passage 202 is closed. The piston rod 501 presses the air inside the intake passage 202 into the drum 10 through the air outlet pipe 205, and then drives the air inside the drum 10 to enter the exhaust passage 203 from the exhaust holes 204, and then is discharged to the outside through the exhaust passage 203. When the first inclined surface or the second inclined surface on the push block 301 separates from the push rod 405, when the elastic member 404 pushes the support base 403 and the vibration exciter block 401 downward, the support base 403 drives the piston rod 501 to move downward. At this time, the check valve inside the air outlet pipe 205 is closed, and the check valve inside the intake passage 202 is opened. The piston rod 501 extracts the outside air into the intake passage 202, realizing the introduction of the outside air. In this way, through the up and down movement of the piston rod 501 relative to the piston sleeve 502, the outside air can be continuously introduced into the drum 10 from the intake passage 202 and the air outlet pipe 205, and the air inside the drum 10 can be continuously discharged to the outside through the exhaust holes 204 and the exhaust passage 203, realizing the continuous circulation of the outside air along the inside of the drum 10, thereby realizing the cooling of the drum 10.

[0025] In one embodiment, the elastic member 404 can be a spring or a metal leaf spring, and there is no limitation here.

[0026] Please refer to Figure 2 and Figure 3, in one embodiment, a plurality of sets of the excitation assembly 40 and the air intake assembly 50 are provided at intervals along the length direction of the support shaft 201 inside the drum 10, and the support seats 403 corresponding to two adjacent sets of the excitation assemblies 40 are fixedly connected by a linkage rod 406.

[0027] When the first inclined surface or the second inclined surface on the push block 301 acts on the push rod 405, the support seats 403 corresponding to a plurality of excitation assemblies 40 can move upward synchronously under the action of the linkage rod 406, thereby driving a plurality of excitation blocks 401 to move upward synchronously. When the first inclined surface or the second inclined surface on the push block 301 is separated from the push rod 405, the elastic members 404 corresponding to a plurality of excitation assemblies 40 can push a plurality of support seats 403, thereby driving a plurality of excitation blocks 401 to move downward synchronously. The plurality of excitation blocks 401 impact different positions of the inner bottom wall of the drum 10, thereby increasing the force-bearing area of the drum 10 to improve the vibration compaction effect of the road surface asphalt.

[0028] In the embodiment of the present invention, when it is necessary to compact the road surface asphalt, the staff drives the towing vehicle to travel along the road surface. The towing vehicle drives the drum 10 to roll along the road surface through the bracket 20. At this time, the drum 10 presses the road surface to perform preliminary compaction on the road surface asphalt. While the drum 10 rolls along the road surface, the driving assembly 30 can also drive the excitation assembly 40 to vibrate inside the drum 10 and impact the inner wall of the drum 10. The drum 10 transmits the impact force to the road surface asphalt, thereby realizing further compaction of the road surface asphalt; when the excitation assembly 40 vibrates as described above, the air intake assembly 50 can draw in the outside air and make the outside air pass through the inside of the drum 10, thereby performing a cooling and temperature reduction treatment on the drum 10 to prevent the temperature inside the drum 10 from being too high, so as to ensure that the drum 10 can perform compaction operations on the road surface asphalt for a long time, thereby improving the compaction efficiency of the road surface asphalt. Compared with the prior art, when the driving assembly 30 drives the excitation assembly 40 to vibrate to compact the road surface asphalt, the air intake assembly 50 is used to draw in the outside air and make the outside air pass through the inside of the drum 10, thereby realizing the cooling and temperature reduction of the drum 10, and further prolonging the working duration of the drum 10 and improving the compaction efficiency of the road surface asphalt.

[0029] The above has described the preferred embodiments of the present invention in detail, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A pavement compaction device for road and bridge engineering, characterized in that, It includes a drum (10), a bracket (20), a drive assembly (30), a vibration excitation assembly (40), and an air intake assembly (50). The bracket (20) has a U-shaped structure. A support shaft (201) is rotatably arranged inside the bracket (20). The outside of the bracket (20) is connected to an external towing vehicle. The support shaft (201) penetrates through the drum (10) and is in rotational cooperation with the drum (10). The vibration excitation assembly (40) is installed on the shaft body of the support shaft (201) inside the drum (10). The drive assembly (30) is arranged on the inner side wall of the drum (10). When the drum (10) rolls along the road surface, the drive assembly (30) drives the vibration excitation assembly (40) to vibrate and impact the inner wall of the drum (10) to achieve vibration compaction of the road surface asphalt. The air intake assembly (50) is arranged inside the drum (10). When the vibration excitation assembly (40) vibrates, the air intake assembly (50) is used to draw in external air and make the external air pass through the inside of the drum (10) to achieve cooling and temperature reduction of the drum (10).

2. The road surface compaction device for road and bridge engineering according to claim 1, characterized in that, The drive assembly (30) includes a number of push blocks (301). A number of the push blocks (301) are installed on the inner side wall of the drum (10). A number of the push blocks (301) are annularly and spacedly distributed on the inner side wall of the drum (10). A first inclined surface is provided on the left side wall of each group of the push blocks (301). The vibration excitation assembly (40) includes a vibration excitation block (401), a connecting rod (402), a support seat (403), an elastic member (404), and a push rod (405). The lower end of the connecting rod (402) is fixedly connected to the vibration excitation block (401), and the upper end is fixedly connected to the support seat (403). The elastic member (404) is arranged on the upper part of the support seat (403) to provide elastic support for the support seat (403) so that the vibration excitation block (401) contacts the inner bottom wall of the drum (10). One end of the push rod (405) is fixedly connected to the support seat (403), and the other end extends between two adjacent groups of the push blocks (301).

3. A road surface compaction device for a road and bridge project according to claim 2, characterized in that, A rotating shaft (302) is rotatably arranged on a number of the push blocks (301). The rotating shaft (302) is fixedly installed on the inner wall of the drum (10). A second inclined surface is provided on the right side wall of each group of the push blocks (301). An arc-shaped sliding groove (303) is provided on each group of the push blocks (301). A limiting block (304) is movably arranged inside each group of the arc-shaped sliding grooves (303). The limiting block (304) is fixedly installed on the inner wall of the drum (10).

4. A road surface compaction device for a road and bridge project according to claim 3, characterized in that, The center of the arc-shaped sliding groove (303) coincides with the center of the rotating shaft (302).

5. A pavement compaction device for road and bridge engineering according to claim 2, characterized in that, An air intake channel (202) is arranged at one end inside the support shaft (201), and an exhaust channel (203) is arranged at the other end. The air intake channel (202) is not communicated with the exhaust channel (203). An air outlet pipe (205) and exhaust holes (204) are arranged on the shaft body of the support shaft (201) located inside the drum (10). The air outlet pipe (205) is communicated with the air inlet channel (202), and the exhaust holes (204) are communicated with the exhaust channel (203). One-way valves are arranged inside both the air outlet pipe (205) and the air inlet channel (202). The air guiding assembly (50) includes a piston rod (501) and a piston sleeve (502). The piston sleeve (502) is fixedly arranged at the bottom of the support shaft (201) and is communicated with the air inlet channel (202). The upper end of the piston rod (501) extends into the piston sleeve (502) and is in telescopic cooperation with the piston sleeve (502). The lower end extends below the piston sleeve (502) and is fixedly connected to the support seat (403). One end of the elastic member (404) is connected to the support seat (403), and the other end is connected to the piston sleeve (502).

6. The road surface compaction device for road and bridge engineering according to claim 5, wherein, The elastic member (404) is a spring or a metal shrapnel.

7. A pavement compaction device for road and bridge engineering according to claim 2, characterized in that, A plurality of groups of the vibration exciting assembly (40) and the air guiding assembly (50) are arranged at intervals along the length direction of the support shaft (201) inside the drum (10). The support seats (403) corresponding to two adjacent groups of the vibration exciting assembly (40) are fixedly connected by a linkage rod (406).

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