A vehicle-mounted automatic compaction device for asphalt pavement repair

Abstract

This invention discloses a vehicle-mounted automatic compaction device for asphalt pavement repair, belonging to the field of road construction machinery technology. It includes a mounting frame connected to a vehicle frame and a compaction roller assembly. The compaction roller assembly is driven by a swinging component to move left and right along a long track below the mounting frame. A front push plate is located in front of the pressure roller of the compaction roller assembly. Both ends of the front push plate are connected to the pressure roller frame of the compaction roller assembly through adjustment mechanisms. Pressure is applied to the pressure roller through a hydraulic system. The mounting frame is connected to the vehicle frame by pins for easy loading and unloading. The swinging component drives the pressure roller to move left and right, enabling pothole repair while the vehicle is stationary. The front push plate pushes away excess asphalt mixture, meeting the high-pressure compaction requirements. This invention enables rapid repair of asphalt pavements; the hydraulic system controls the ground pressure of the pressure roller, achieving light and heavy compaction effects, thus ensuring rapid maintenance of asphalt pavements.

Description

Technical Field

[0001] This invention belongs to the field of road construction machinery technology, and specifically relates to a vehicle-mounted automatic compaction device for asphalt pavement repair. Background Technology

[0002] Currently, the total length of highways in my country has exceeded 5 million kilometers. Asphalt pavement, with its advantages of smooth surface, seamless construction, and low vibration, is the most commonly used pavement type. However, due to problems such as poor construction techniques and short construction periods, asphalt pavements frequently suffer from numerous ruts, potholes, and other defects, indicating that my country's highways have entered a period of road maintenance. In asphalt road maintenance, compaction is a crucial step, a key technology for compacting asphalt mixtures, and the final step in ensuring the stability of the road structure after repair. Compaction machinery, as a major participant, plays a vital role in road maintenance. Compaction machinery utilizes its own weight, vibration, impact, and oscillation to repeatedly load the material being compacted, causing its internal structure to rearrange, eliminating internal air gaps and moisture, and achieving relatively stable deformation with a certain load-bearing capacity.

[0003] Existing asphalt pavement compaction machinery includes static and pneumatic tire rollers, which rely on their own weight to compact the pavement during operation. They are mainly suitable for large-area pavement paving, but they consume too much manpower and time. However, they are extremely inconvenient to repair small potholes.

[0004] In addition, the hot asphalt mixture needed for repairing asphalt pavements is currently either transported directly from the asphalt mixing plant to the construction site by transport vehicles equipped with insulated silos, or the stored cold asphalt mixture is reheated and reused, or the aggregate and hot asphalt are mixed on-site using specialized equipment. The supply cost is high, and the mixing of aggregate and hot asphalt on-site requires a lot of time, which seriously affects the repair speed of asphalt pavements. Summary of the Invention

[0005] To address the above problems, the present invention provides a vehicle-mounted automatic compaction device for asphalt pavement repair.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A vehicle-mounted automatic compaction device for asphalt pavement repair includes a mounting frame and a compaction roller assembly below it. The top of the mounting frame can be connected to a vehicle frame, and a long track is horizontally provided below the bottom of the mounting frame. The compaction roller assembly can slide with the long track and is connected to a swinging component that can drive the compaction roller assembly to move left and right on the long track. A front push plate is provided in front of the pressure roller of the compaction roller assembly. The two ends of the front push plate are connected to the pressure roller frame of the compaction roller assembly through an adjustment mechanism. The front push plate is used to push away excess asphalt mixture in front of the pressure roller. A vertical load is applied to the pressure roller through the hydraulic system of the vehicle frame.

[0008] Furthermore, the top of the mounting frame is connected to the vehicle frame via multiple pins, and two long rails running side by side are provided below the bottom surface of the mounting frame. The two ends of the long rails are connected to the mounting frame via fixing blocks. The top of the pressure roller frame is provided with two guide holes that cooperate with the long rails. The swinging component is located between the two long rails and at one end of the mounting frame, and the movable end of the swinging component is connected to the pressure roller frame.

[0009] Furthermore, the swing component includes a hydraulic sleeve and a swing rod. The end of the hydraulic sleeve is connected to the mounting frame via a hinge. The hydraulic sleeve contains hydraulic oil, which is controlled by the hydraulic system of the frame. One end of the swing rod is connected to a piston inside the hydraulic sleeve, and the other end of the swing rod is connected to the pressure roller frame.

[0010] Furthermore, the compaction roller assembly includes a roller frame and a roller below it. A scraper is provided on the lower front side of the roller frame for scraping off the asphalt mixture on the roller. The upper side of the scraper is fixed on the long shaft of the scraper, and both ends of the long shaft of the scraper are connected to the roller frame.

[0011] Furthermore, the front push plate is a rectangular plate, the length of the front push plate is greater than the length of the pressure roller, and a row of comb teeth is provided at the lower part of the front push plate.

[0012] Furthermore, the adjusting mechanism includes a bent plate, a triangular pull plate, a lower connecting rod, and a middle connecting rod. The front push plate is fixed to the front end of the bent plate. The upper rear end of the bent plate is rotatably connected to the front end of the triangular pull plate, and the lower rear end is rotatably connected to the front end of the lower connecting rod. The rear end of the lower connecting rod and the lower rear end of the triangular pull plate are rotatably connected to the end cover of the pressure roller frame. The upper rear end of the triangular pull plate is rotatably connected to the front end of the middle connecting rod. The lower connecting rod is parallel to the bottom edge of the triangular pull plate. The rear end of the middle connecting rod is rotatably connected to the lower end of the drive rod. The middle part of the drive rod is rotatably connected to the end cover. The drive end of the drive rod is rotatably connected to the end of the piston rod of the adjusting hydraulic cylinder. The adjusting hydraulic cylinder is located on the side of the pressure roller frame.

[0013] Furthermore, there are multiple pressure rollers, and the multiple pressure rollers are arranged in series. The pressure roller in the middle position has a roller shaft in the middle and square seats at both ends that are connected to the pressure roller frame. The outer side of the square seat is also provided with a seated outer spherical bearing for mounting the roller shaft of the outer pressure roller.

[0014] Furthermore, during the compaction process of road surface repair, the pressure roller rolls forward at a constant speed, consuming energy as its moment of inertia. and the kinetic energy of the pressure roller itself

[0015] Wherein, the moment of inertia is the energy generated by the rotation of the pressure roller, J is the moment of inertia, and W is the angular velocity; the kinetic energy of the pressure roller is the kinetic energy of the roller center moving forward, m is the mass of the compaction roller, and v represents the velocity.

[0016] The force analysis of the pressure roller is as follows:

[0017] F = R X P = R Y ,R X ×K=a n ×R Y (1)

[0018] In the formula, F is the thrust of the pressure roller, P is the vertical load applied to the pressure roller by the hydraulic system, and R... X and R Y The ground's reaction force on the pressure roller is K, which is the vertical distance from the point of resultant reaction force to the center of the pressure roller. n The horizontal distance from the point of reaction resultant force to the center of the pressure roller is given by equation (1):

[0019]

[0020] The energy required for the thrust of the pressure roller during operation is the sum of the roller's rotational inertia and the energy consumed in its forward motion.

[0021] Furthermore, the compaction work is controlled by controlling the load P on the pressure roller through the hydraulic system; when repairing potholes, the asphalt mixture is filled into the potholes, first lightly pressed multiple times, and then the load on the pressure roller is adjusted for final pressing; the load on the pressure roller during final pressing is greater than the load on the pressure roller during initial pressing.

[0022] Furthermore, the height of the front push plate from the ground is determined by equation (3):

[0023]

[0024] In the formula, H is the loose paving height of the asphalt mixture, and h is the height of the push plate from the ground.

[0025] Furthermore, the length of the pressure roller is determined by equation (4):

[0026] q=(m f +m0) / L (4)

[0027] In the formula, q is the grounding wire load of the pressure roller, taken as 300 N / cm; m f The load is the load on the mounting frame, m0 is the mass of the pressure roller, and L is the length of the pressure roller.

[0028] The diameter d of the pressure roller is determined by equation (5):

[0029]

[0030] The technological advancements achieved by this invention compared to existing technologies are as follows:

[0031] This invention utilizes a hydraulic system within the vehicle frame to provide and adjust the compaction load. A swinging component propels the pressure roller to move freely left and right along a long track, enabling pothole repairs to be completed even when the vehicle is stationary, saving significant time and manpower. During compaction, the pressure roller uses a front pusher plate to push away excess asphalt mixture, meeting the high-pressure compaction requirements. A scraper on the front of the pressure roller removes asphalt from the roller. This invention smoothly completes the pushing, scraping, and compaction steps in road repair, enabling rapid asphalt pavement repair. Simultaneously, the hydraulic system controls the ground pressure of the pressure roller, achieving both light and heavy compaction effects, solving the problem of uneven compaction, and improving the compaction effect; thus providing a guarantee for the rapid maintenance of asphalt pavements. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0033] In the attached diagram:

[0034] Figure 1 This is a schematic diagram of the structure of a vehicle-mounted automatic compaction device for asphalt pavement repair provided in an embodiment of the present invention;

[0035] Figure 2 for Figure 1 Top view of the intermediate compaction device;

[0036] Figure 3 for Figure 1 Left view of the intermediate compaction device;

[0037] In the picture:

[0038] 1-Mounting frame; 2-Compactor roller assembly; 21-Pressure roller; 22-Pressure roller frame; 23-Scraper; 24-Scraper long shaft; 25-Square seat; 26-Seat-mounted spherical bearing; 3-Long track; 4-Front push plate; 5-Swing component; 51-Hydraulic sleeve; 52-Swing rod; 53-Hinge; 6-Fixing block; 7-Pin; 8-Comb teeth; 9-Bend plate; 10-Triangular pull plate; 11-Lower connecting rod; 12-Middle connecting rod; 13-Drive rod; 14-Adjusting hydraulic cylinder. Detailed Implementation

[0039] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0040] like Figure 1 , Figure 2 and Figure 3 As shown, a vehicle-mounted automatic compaction device for asphalt pavement repair includes a mounting frame 1 and a compaction roller assembly 2 below it. The top of the mounting frame 1 can be connected to the vehicle frame, and a long track 3 is horizontally provided below the bottom of the mounting frame 1. The compaction roller assembly 2 can slide with the long track 3. The compaction roller assembly 2 is connected to a swinging component 5, which can drive the compaction roller assembly 2 to move left and right on the long track 3, making construction more flexible. A front push plate 4 is provided in front of the pressure roller 21 of the compaction roller assembly 2. The two ends of the front push plate 4 are connected to the pressure roller frame 22 of the compaction roller assembly 2 through an adjustment mechanism. The front push plate 4 is used to push away excess asphalt mixture in front of the pressure roller 21. The hydraulic system of the vehicle frame applies a vertical load to the pressure roller 21, which facilitates light and heavy pressure on the asphalt mixture and improves the compaction effect. In practice, an upright hydraulic cylinder can be installed on the vehicle frame. This cylinder drives the compaction device to rise and fall, applying a vertically downward compaction load to the rollers. This compaction device, mounted on the vehicle frame, allows the vehicle to provide asphalt mixture mixing and paving functions. The device enables rapid compaction, ultimately saving manpower and resources and improving repair efficiency.

[0041] During specific assembly, such as Figure 1-3As shown, the top of the mounting frame 1 is connected to the vehicle frame via multiple pins 7. Two parallel long tracks 3 are located below the bottom of the mounting frame 1, with both ends of the long tracks 3 connected to the mounting frame 1 via fixing blocks 6. The top of the pressure roller frame 22 has two guide holes that mate with the long tracks 3. The swing component 5 is positioned between the two long tracks 3 and at one end of the mounting frame 1, with its movable end connected to the pressure roller frame 22. The swing component 5 includes a hydraulic sleeve 51 and a swing rod 52. The end of the hydraulic sleeve 51 is connected to the mounting frame 1 via a hinge pin 53. The hydraulic sleeve 51 contains hydraulic oil, which is controlled by the vehicle frame's hydraulic system. One end of the swing rod is connected to a piston inside the hydraulic sleeve 51, and the other end is connected to the pressure roller frame 22. This structure of the swing component facilitates the left-right movement of the pressure roller frame along the long tracks. During operation, the swing arm is subjected to torques such as thrust, tension or bending moment. The swing arm slides inside the hydraulic sleeve 8, which can convert hydraulic energy into mechanical energy.

[0042] In one specific embodiment of the present invention, such as Figure 1 , 3 As shown, the compaction roller assembly 2 includes a roller frame 22 and a roller 21 below it. A scraper 23 is provided on the lower front side of the roller frame 22 for scraping off the asphalt mixture on the roller 21. The upper side of the scraper 23 is fixed to a long scraper shaft 24, and both ends of the long scraper shaft 24 are connected to the roller frame 22. The scraper is set close to the roller, and the compaction roller moves forward and backward in a reciprocating motion during operation. When moving from bottom to top relative to the scraper, it can scrape off the asphalt mixture and remove the asphalt mixture adhering to the surface of the roller.

[0043] In the specific design, the front push plate 4 is a rectangular plate, and its length is greater than that of the pressure roller 21. A row of comb teeth 8 is provided at the lower part of the front push plate 4. The height of the front push plate from the ground is half the loose height of the asphalt mixture. This structure allows the front push plate to reduce resistance while simultaneously combing the surface of the asphalt mixture during the process of pushing away excess asphalt. When the pressure roller is working, the front push plate pushes away the excess asphalt mixture, meeting the compaction process requirements.

[0044] In one specific embodiment of the present invention, such as Figure 3As shown, the adjustment mechanism includes a bent plate 9, a triangular pull plate 10, a lower connecting rod 11, and a middle connecting rod 12. The front push plate 4 is fixed to the front end of the bent plate 9. The upper rear end of the bent plate 9 is rotatably connected to the front end of the triangular pull plate 10, and the lower rear end is rotatably connected to the front end of the lower connecting rod 11. The rear end of the lower connecting rod 11 and the lower rear end of the triangular pull plate 10 are rotatably connected to the end caps at both ends of the pressure roller frame 22 via pins. The upper rear end of the triangular pull plate 10 is rotatably connected to the front end of the middle connecting rod 12. The lower connecting rod 11 is parallel to the bottom edge of the triangular pull plate 10. The rear end of the middle connecting rod 12 is rotatably connected to the lower end of the drive rod 13. The middle part of the drive rod 13 is rotatably connected to the end cap. The drive end of the drive rod 13 is rotatably connected to the piston rod end of the adjusting hydraulic cylinder 14. The adjusting hydraulic cylinder 14 is located on the side of the pressure roller frame 22. In practical applications, adjusting the hydraulic cylinder can push the middle connecting rod to move back and forth by pushing and pulling the drive rod, thereby pushing the triangular pull plate to rotate around its lower rear pin. The triangular pull plate then drives the front push plate to move up and down through the bending plate. At the same time, the lower connecting rod is always parallel to the bottom edge of the triangular pull plate, which can ensure that the front push plate is always in a vertical state.

[0045] Further optimize the above technical solutions, such as Figure 3 As shown, there are multiple pressure rollers 21, which are connected in series. The pressure roller 21 in the middle position has a roller shaft in the middle and square seats 25 at both ends that are connected to the pressure roller frame 22. The outer side of the square seat 25 is also provided with a seated outer spherical bearing 26 for mounting the roller shaft of the outer pressure roller 21. When encountering pits with a large repair area, multiple pressure rollers can be connected to increase the length.

[0046] I. The mechanical analysis of the pressure roller is as follows:

[0047] During the compaction process of road repair, the pressure roller 21 typically rolls forward at a constant speed, consuming energy as its moment of inertia. and the kinetic energy of the pressure roller itself

[0048] Wherein, the moment of inertia is the energy generated by the rotation of the pressure roller, J is the moment of inertia, and W is the angular velocity; the kinetic energy of the pressure roller is the kinetic energy of the roller center moving forward, m is the mass of the compaction roller, and v represents the velocity.

[0049] Next, a force analysis of the pressure roller is performed. From the mechanical equilibrium relationship, it can be seen that:

[0050] F = R X P = R Y ,R X ×K=a n ×R Y (1)

[0051] In the formula, F is the thrust of the pressure roller, P is the vertical load applied to the pressure roller by the hydraulic system, and R...X and R Y The ground's reaction force on the pressure roller is K, which is the vertical distance from the point of resultant reaction force to the center of the pressure roller. n The horizontal distance from the point of reaction resultant force to the center of the pressure roller is given by equation (1):

[0052]

[0053] Therefore, it can be concluded that the energy required for the thrust of the pressure roller during operation is the sum of the roller's rotational inertia and the energy consumed in its forward motion.

[0054] In this invention, the load P on the pressure roller is controlled by a hydraulic system on the chassis, thus controlling the compaction work. The work done by the compaction device on the asphalt mixture is called compaction work. Studies have shown that the greater the compaction work, the greater the shear and compressive strength of the asphalt mixture after molding. However, when repairing potholes, initial compaction and final compaction are required. Initial compaction involves several light presses to fill the pothole with the asphalt mixture. Then, the pressure on the pressure roller is adjusted for final compaction, i.e., heavy compaction.

[0055] In addition, since the pressure roller moves forward in an uphill posture during operation, the required thrust increases with the increase of the angle. Therefore, a front push plate is installed on the front side. The height of the front push plate from the ground is determined by equation (3):

[0056]

[0057] In the formula, H is the loose paving height of the asphalt mixture, and h is the height of the front push plate from the ground. During operation, excess asphalt mixture can be pushed away for other uses, reducing the energy required for the pressure roller to push, and achieving a breakthrough in rapid, energy-saving, and compaction effects.

[0058] II. Pressure Roller Dimension Design:

[0059] According to JTGE20-2011 Highway Engineering Asphalt and Asphalt Mixture Test Procedure, the compaction line load is 300 N / cm, and the length of the roller is determined by formula (4):

[0060] q=(m f +m0) / L (4)

[0061] In the formula, q is the grounding wire load of the pressure roller, taken as 300 N / cm; m f The load is the load on the mounting frame, m0 is the mass of the pressure roller, and L is the length of the pressure roller.

[0062] The diameter d of the pressure roller is determined by equation (5):

[0063]

[0064] When the roadbed material, compaction process, roller material, and other conditions are constant, the compaction effect is affected by the roller diameter. By adjusting the roller diameter, performing mechanical analysis on the roller, and adjusting the compaction process, that is, adjusting the vertical load (i.e., ground pressure) of the roller toward the road surface through the hydraulic system, the initial compaction, intermediate compaction, and final compaction can be achieved, thereby improving the compaction effect.

[0065] The specific application process of this invention is as follows:

[0066] The compaction device is mounted on the chassis and is driven by the chassis's hydraulic system to rise, fall, move forward, and move backward. Additionally, the pressure roller can move left and right along a long track, allowing pothole repairs to be completed while the vehicle remains stationary, saving significant time and manpower.

[0067] During operation, the compaction device is first positioned in front of the pothole. The height of the compaction device is adjusted by the hydraulic system of the chassis to achieve the first light compaction. As the compaction device moves forward, the front push plate pushes away excess asphalt mixture, and the scraper on the front side of the roller ensures that there is no asphalt mixture on the roller. After light compaction, the hydraulic system of the chassis adjusts the compaction device for heavy compaction. Different compaction cycles represent different compaction efforts, which are incorporated as design parameters into the compaction of the road surface. By adjusting the compaction process through the hydraulic system, a better-performing road surface can be repaired.

[0068] In summary, this invention has the advantages of simple structure and convenient and quick operation. It can be mounted on a vehicle frame via pins on the mounting bracket, allowing the vehicle to mix and spread the asphalt mixture, followed by rapid compaction of the road surface using rollers, saving manpower and resources and improving repair efficiency. Furthermore, by adjusting the roller diameter and using the vehicle's hydraulic system to adjust the roller's position and ground stress, the problem of uneven compaction is solved. This invention is particularly suitable for repairing smaller potholes, overcoming the shortcomings of existing asphalt pavement repair methods, which are time-consuming, labor-intensive, and costly.

[0069] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A vehicle-mounted automatic compaction device for asphalt pavement repair, characterized in that: The compaction device includes a mounting frame and a compaction roller assembly below it. The top of the mounting frame can be connected to the vehicle frame, and a long track is horizontally provided below the bottom of the mounting frame. The compaction roller assembly can slide with the long track. The compaction roller assembly is connected to a swinging component, which can drive the compaction roller assembly to move left and right on the long track. A front push plate is provided in front of the pressure roller of the compaction roller assembly. The two ends of the front push plate are connected to the pressure roller frame of the compaction roller assembly through an adjustment mechanism. The front push plate is used to push away excess asphalt mixture in front of the pressure roller. The height of the front push plate from the ground is determined by equation (3): （3） In the formula, H is the loose paving height of the asphalt mixture, and h is the height of the push plate from the ground. The compaction roller assembly includes a roller frame and a roller below it. A scraper is provided on the lower front side of the roller frame for scraping off the asphalt mixture on the roller. The upper side of the scraper is fixed to a long shaft, and both ends of the long shaft are connected to the roller frame. The scraper is set close to the roller. When the roller is working, it moves forward and backward in a reciprocating motion. When the scraper moves from bottom to top relative to the roller, it scrapes off the asphalt mixture, thus removing the asphalt mixture adhering to the surface of the roller. The length of the pressure roller is determined by equation (4): （4） In the formula, q is the grounding wire load of the pressure roller, taken as 300 N / cm; m f The load is the load on the mounting frame, m0 is the mass of the pressure roller, and L is the length of the pressure roller. The diameter d of the pressure roller is determined by equation (5): （5） A vertical load is applied to the pressure rollers via the hydraulic system of the vehicle frame; during the compaction process of road repair, the pressure rollers roll forward at a constant speed, consuming energy as rotational inertia. and the kinetic energy of the pressure roller itself ; Wherein, the moment of inertia is the energy generated by the rotation of the pressure roller, J is the moment of inertia, and W is the angular velocity; the kinetic energy of the pressure roller is the kinetic energy of the roller's center moving forward, m is the mass of the pressure roller, and v represents the velocity. The force analysis of the pressure roller is as follows: （1） In the formula, F is the thrust of the pressure roller, P is the vertical load applied to the pressure roller by the hydraulic system, and R... X and R Y Let K be the reaction force of the ground on the pressure roller, and K be the vertical distance from the point of resultant reaction force to the center of the pressure roller. n The horizontal distance from the point of reaction resultant force to the center of the pressure roller is given by equation (1): （2） The energy required for the thrust of the pressure roller during operation is the sum of the roller's rotational inertia and the energy consumed in its forward motion. The compaction work is controlled by the load P on the pressure roller through the hydraulic system. When repairing potholes, the asphalt mixture is filled into the potholes and first lightly pressed multiple times. Then the load on the pressure roller is adjusted for final pressing. The load on the pressure roller during final pressing is greater than the load on the pressure roller during initial pressing.

2. The vehicle-mounted automatic compaction device for asphalt pavement repair according to claim 1, characterized in that: The top of the mounting frame is connected to the vehicle frame by multiple pins. Two long rails are arranged side by side on the bottom surface of the mounting frame. The two ends of the long rails are connected to the mounting frame by fixing blocks. The top of the pressure roller frame is provided with two guide holes that cooperate with the long rails. The swinging component is located between the two long rails and at one end of the mounting frame. The movable end of the swinging component is connected to the pressure roller frame.

3. The vehicle-mounted automatic compaction device for asphalt pavement repair according to claim 1, characterized in that: The swinging component includes a hydraulic sleeve and a swing rod. The end of the hydraulic sleeve is connected to the mounting frame via a hinge. The hydraulic sleeve contains hydraulic oil, which is controlled by the hydraulic system of the frame. One end of the swing rod is connected to a piston inside the hydraulic sleeve, and the other end of the swing rod is connected to the pressure roller frame.

4. The vehicle-mounted automatic compaction device for asphalt pavement repair according to claim 1, characterized in that: The front push plate is a rectangular plate, and the length of the front push plate is greater than the length of the pressure roller. A row of comb teeth is provided at the lower part of the front push plate.

5. The vehicle-mounted automatic compaction device for asphalt pavement repair according to claim 1, characterized in that: The adjusting mechanism includes a bent plate, a triangular pull plate, a lower connecting rod, and a middle connecting rod. The front push plate is fixed to the front end of the bent plate. The upper rear end of the bent plate is rotatably connected to the front end of the triangular pull plate, and the lower rear end is rotatably connected to the front end of the lower connecting rod. The rear end of the lower connecting rod and the lower rear end of the triangular pull plate are rotatably connected to the end cover of the pressure roller frame. The upper rear end of the triangular pull plate is rotatably connected to the front end of the middle connecting rod. The lower connecting rod is parallel to the bottom edge of the triangular pull plate. The rear end of the middle connecting rod is rotatably connected to the lower end of the drive rod. The middle part of the drive rod is rotatably connected to the end cover. The drive end of the drive rod is rotatably connected to the end of the piston rod of the adjusting hydraulic cylinder. The adjusting hydraulic cylinder is located on the side of the pressure roller frame.

6. The vehicle-mounted automatic compaction device for asphalt pavement repair according to claim 1, characterized in that: The pressure rollers are multiple and connected in series. The pressure roller in the middle position has a roller shaft in the middle and square seats at both ends that are connected to the pressure roller frame. The outer side of the square seat is also provided with a seated outer spherical bearing for mounting the roller shaft of the outer pressure roller.

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