A road surface tamping device

Abstract

This invention discloses a road compaction device, relating to the field of road construction equipment technology. It includes a traveling body, a transverse telescopic compaction arm, and a conforming compaction end head located at the end of the transverse telescopic compaction arm. The conforming compaction end head includes a slewing base, a compaction power unit, a floating pressure seat, and a conforming compaction plate. The floating pressure seat maintains the vertical compaction force output by the compaction power unit to the conforming compaction plate. The conforming compaction plate includes a rigid compaction base plate, an elastic edge contact element, and a rigid pressure strip. The elastic edge contact element extends laterally beyond the edge of the floating pressure seat from the obstacle-prone side of the rigid compaction base plate. The rigid pressure strip is connected to an eccentric force arm on the slewing base via an edge transmission element. When the elastic edge contact element is laterally pressed by a curb, trench sidewall, or pipeline protection structure, the slewing base is driven to rotate via the edge transmission element, causing the conforming compaction plate to automatically adjust its contact angle according to the boundary contour. Simultaneously, the rigid compaction base plate maintains vertical compaction of the edge fill material, thus balancing edge compaction, collision prevention, and operational efficiency.

Description

Technical Field

[0001] This invention relates to the field of road construction equipment technology, and in particular to a road surface compaction device. Background Technology

[0002] Road base course, pavement structure layer, backfill layer behind curbs, pipeline trench backfill layer, and backfill layer around manholes typically require layered paving and compaction during construction. For ordinary open road sections, large road rollers can continuously compact the fill layer using steel or rubber wheels, resulting in high compaction efficiency and good uniformity. However, near curbs, trench sidewalls, manholes, pipeline protection structures, or edge retaining structures, large road rollers are limited by their overall width, wheel profile, safety distance, and driver visibility, making it difficult to directly cover the root area of ​​boundary structures with compaction.

[0003] To supplement the aforementioned edge areas, current construction practices often employ small plate compactors, walk-behind compactors, or compaction attachments mounted on the ends of excavators and loaders. While small plate compactors can access narrower areas, they require multiple manual back-and-forth operations, resulting in low efficiency. Furthermore, the distance and orientation between the compactor plate and the boundary structure are difficult to control stably during manual operation, easily leading to missed compactions or repeated compaction in certain areas. Although compaction attachments mounted on the ends of construction machinery can increase the impact energy per strike, their compactor plates are typically rigid, and the relative angle between the compactor plate and the boundary structure relies heavily on the overall machine posture, the robotic arm posture, or the operator's experience for adjustment.

[0004] Within straight curbs or regular trenches, the above adjustment methods can meet general construction needs; however, in actual road construction sites, boundary structures often have corners, curved sections, local misalignments, bulging sidewalls, irregular manhole cover edges, or variations in trench width. When rigid compaction slabs are placed close to the boundary structures to ensure edge compaction, the edges of the slabs are prone to bumping into curbs, manhole covers, or pipeline protective layers. When operators maintain a large safety distance to avoid bumps, a loose zone that cannot be effectively compacted is formed in the vicinity of the boundary. This loose zone is prone to subsidence, edge erosion, cracks, and local voids under subsequent vehicle loads or rainwater intrusion, affecting the durability of the road edge structure.

[0005] Therefore, existing road compaction equipment faces the following main contradictions when operating near boundaries: on the one hand, the compaction plate needs to be as close as possible to boundary structures to ensure the compaction quality of the curb base, the sidewalls of the trench, or the area around manholes; on the other hand, it is necessary to avoid direct impact of the rigid compaction plate on the structures to prevent damage to the corners of the structures or the protective layer of pipelines. Therefore, existing equipment lacks a structure that can passively adjust the contact angle according to the boundary contour during edge compaction, while maintaining the main vertical compaction force output while preventing collisions. Summary of the Invention

[0006] The purpose of this invention is to provide a road compaction device to solve the problem that when existing compaction devices are used to work on curbs, trench sidewalls or pipeline protection structures, the rigid compaction plate is difficult to simultaneously achieve edge compaction, automatic adhesion and structure protection.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: The present invention provides a road compaction device, including a traveling body, a transverse telescopic compaction arm, and a conforming compaction end head disposed at the end of the transverse telescopic compaction arm. The conforming compaction end head includes a slewing seat rotatably connected to the transverse telescopic compaction arm about a vertical axis, a compaction power unit installed on the slewing seat, a floating pressing seat, and a conforming compaction plate; the floating pressing seat includes an upper pressing plate connected to the compaction power unit, a lower pressing plate connected to the rigid compaction base plate in the conforming compaction plate, and a connecting plate for the upper pressing plate and the lower pressing seat. The vertical guide post of the pressing plate is described below; the conformal tamping plate also includes an elastic contact edge member disposed on the obstacle side of the rigid tamping base plate and a rigid pressure strip connected to the back side of the elastic contact edge member. The elastic contact edge member extends laterally from the obstacle side of the rigid tamping base plate beyond the edge of the floating pressing seat. The rigid pressure strip is connected to an eccentric force arm offset relative to the vertical axis on the rotary seat through a contact edge force transmission member, so that when the elastic contact edge member is subjected to lateral pressure, it drives the rotary seat to rotate around the vertical axis and keeps the rigid tamping base plate receiving the vertical tamping force of the tamping power unit.

[0008] Preferably, the lateral telescopic tamping arm includes a fixed arm cylinder, a telescopic arm slidably inserted inside the fixed arm cylinder, and a telescopic drive for driving the telescopic arm to extend and retract laterally relative to the fixed arm cylinder. A guide slider and a guide groove extending in the telescopic direction are provided between the fixed arm cylinder and the telescopic arm. The oil circuit or electrical control circuit of the telescopic drive is provided with a locking component for restricting the telescopic arm from retracting during the tamping operation.

[0009] Preferably, an angle limiting component and a reset component are provided between the rotary seat and the transverse telescopic tamping arm. The angle limiting component includes an arc-shaped limiting groove and a limiting pin extending into the arc-shaped limiting groove. The reset component is connected between the rotary seat and the transverse telescopic tamping arm.

[0010] Preferably, a damping element is further provided between the rotary seat and the transverse telescopic tamping arm. One end of the damping element is connected to the transverse telescopic tamping arm, and the other end is connected to the rotary seat, which is used to reduce the swing speed of the rotary seat when it is instantaneously pressed by the elastic contact edge.

[0011] Preferably, the elastic contact edge is a strip-shaped polyurethane contact edge extending along the traveling direction of the rigid compacted base plate, the rigid pressure strip is embedded in the back side of the elastic contact edge, and the contact edge force transmission member includes a push-pull rod with one end hinged to the rigid pressure strip, and the other end of the push-pull rod is hinged to the eccentric force arm.

[0012] Preferably, the elastic contact element extends laterally beyond the edge of the floating pressing seat by 20mm-60mm, and the lower surface of the elastic contact element is 1mm-5mm lower than the lower surface of the rigid compacted base plate in its natural state, so that the elastic contact element contacts the boundary structure before the rigid compacted base plate and forms a working bottom surface that tends to be flush with the rigid compacted base plate after being compressed.

[0013] Preferably, the floating pressing seat further includes a pressing elastic element sleeved on the outside of the vertical guide column, the pressing elastic element abutting between the upper pressing plate and the lower pressing plate, so that the conforming tamping plate has a vertical floating stroke relative to the compaction power unit.

[0014] Preferably, the ramming plate is provided with a guide edge wheel on the front side along the direction of travel. The guide edge wheel is located on the obstacle side of the rigid ramming base plate, and the guide edge wheel is connected to the rigid pressure strip through a wheel frame. It is used to guide the slewing seat to rotate in advance before the elastic edge member contacts the boundary structure.

[0015] Preferably, a pressure detection element is provided on the contact force transmission element or the rigid pressure strip, and a controller is provided on the walking body. The controller is electrically connected to the pressure detection element, the lateral telescopic tamping arm and the tamping power unit, and is used to control the lateral telescopic tamping arm to retract, control the tamping power unit to unload, or control the contour tamping end to lift when the lateral resistance detected by the pressure detection element exceeds a set threshold.

[0016] Preferably, the rigid compacted base plate has an arc transition edge on the obstacle-side edge, and a wear-resistant base plate is detachably connected to the bottom of the rigid compacted base plate.

[0017] The beneficial effects of this invention are as follows: This invention uses a lateral telescopic tamping arm to deliver the conformal tamping end into the boundary area that the traveling machine cannot directly cover. Through elastic contact parts, rigid pressure strips, contact force transmission parts, and eccentric force arms, the lateral resistance pressure generated by the boundary structure is converted into the rotational force of the slewing seat around the vertical axis. This allows the conformal tamping plate to automatically adjust its fitting angle with the boundary contour when it is close to curb stones, trench sidewalls, or pipeline protection structures, reducing the frequency of manual posture adjustment.

[0018] Furthermore, the conformal compaction plate is divided into a rigid compaction base plate and an elastic contact element. The elastic contact element contacts the boundary structure before the rigid compaction base plate, and is used to absorb lateral collisions and trigger conformal rotation. The rigid compaction base plate is mainly used to receive the vertical compaction force transmitted by the compaction power unit and compact the edge filler, thereby realizing the partitioned undertaking of anti-collision function and effective compaction function, avoiding the problem of excessive attenuation of compaction force caused by simply adding a flexible pad layer.

[0019] Furthermore, a stable vertical force transmission path is formed by the upper and lower pressure plates and vertical guide columns in the floating pressure seat, so that when the rotary seat adjusts its angle due to the contact edge, the tamping power unit can still transmit vertical excitation force or impact force to the rigid tamping base plate, reducing the force transmission deviation caused by end deflection, lateral contact or local unevenness of the ground.

[0020] Furthermore, through angle limiting components, reset components, and damping components, the slewing seat possesses the capabilities of pressure-induced rotation, amplitude-limited obstacle avoidance, disengagement and reset, and buffering and sway suppression, thereby adapting to local protrusions, angles, or arc changes of boundary structures and improving the continuity and stability of edge compaction operations.

[0021] Finally, the present invention further improves the boundary recognition and overload protection capabilities through the guide edge wheel and pressure detection component. When the lateral pressure increases abnormally, it can control the retraction of the lateral telescopic tamping arm, the unloading of the tamping power unit, or the lifting of the contour tamping end, thereby reducing the risk of impact damage to curb stones, manhole covers, or pipeline protective layers. Attached Figure Description

[0022] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the road compaction equipment of the present invention; Figure 2 This is an exploded view of the assembly structure of the contour-following and compacting end of the present invention; Figure 3 This is a front view of the assembly structure of the lower pressure plate and the contour ramming plate of the present invention; Figure 4 This is one of the side view structural schematic diagrams of the conformal compaction end of the present invention; Figure 5 This is the second side view structural schematic diagram of the conformal compaction end of the present invention; Figure 6 This is the third side view structural schematic diagram of the conformal compaction end of the present invention; Figure 7This is the fourth side view structural schematic diagram of the conformal compaction end of the present invention; Figure 8 This is the fifth side view structural diagram of the conformal compaction end of the present invention.

[0024] The reference numerals in the attached figures are as follows: 1. Walking body; 11. Chassis; 12. Power output unit; 13. Controller; 2. Lateral telescopic rammer arm; 21. Fixed arm cylinder; 22. Telescopic arm; 23. Telescopic drive component; 24. Guide slider; 241. Guide groove; 25. End mounting base; 3. Contouring compaction end; 31. Rotary seat; 311. Vertical shaft; 312. Eccentric force arm; 313. Arc-shaped limiting groove; 314. Limiting pin; 315. Reset assembly; 316. Damping component; 32. Compaction power unit; 33. Floating pressing seat; 331. Upper pressing plate; 332. Lower pressing plate; 333. Vertical guide column; 334. Pressing elastic component; 34. Contouring compaction plate; 341. Rigid compaction base plate; 342. Elastic contact edge component; 343. Rigid pressure strip; 344. Contact edge force transmission component; 345. Arc transition edge; 346. Wear-resistant base plate; 35. Guide contact edge wheel; 351. Wheel frame; 36. Pressure detection component; 4. Boundary structures; 5. Edge filler layer. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0026] The specific implementation provides a road compaction device that effectively solves the problem that when existing compaction devices are used on curbs, trench sidewalls, or beside pipeline protection structures, rigid compaction plates cannot simultaneously achieve edge compaction, automatic adhesion, and structure protection.

[0027] Example 1 See Figures 1 to 4 This embodiment provides a road compaction device for compacting the edge filler layer 5 of curb stones, pipeline trench sidewalls, manhole perimeters, or adjacent retaining structures. The road compaction device includes a traveling body 1, a transverse telescopic tamping arm 2, and a contour compaction end 3 disposed at the end of the transverse telescopic tamping arm 2.

[0028] The traveling machine body 1 is a small self-propelled chassis, engineering vehicle chassis, tracked chassis, or wheeled chassis, on which a chassis 11, a power output unit 12, and a controller 13 are mounted. The power output unit 12 is a hydraulic power unit, an electric power unit, or a hydraulic and electric control combined power unit, used to provide power to the lateral telescopic tamping arm 2 and the contour compaction end 3. The lateral telescopic tamping arm 2 is installed on one side of the traveling machine body 1, used to allow the traveling machine body 1 to laterally deliver the contour compaction end 3 into the area adjacent to the boundary while maintaining a safe distance from the boundary structure 4.

[0029] The conformal compaction end 3 includes a swivel base 31, a compaction power unit 32, a floating pressing seat 33, and a conformal compaction plate 34. The swivel base 31 is rotatably connected to the end mounting seat 25 of the transverse telescopic compaction arm 2 via a vertical shaft 311 and connecting parts. The axis of the vertical shaft 311 extends in the vertical direction, allowing the swivel base 31 to swing relative to the transverse telescopic compaction arm 2 in the horizontal plane. The compaction power unit 32 is mounted on the swivel base 31 and is used to output vertical compaction force to the conformal compaction plate 34. The compaction power unit 32 uses an eccentric vibrator, a hydraulic impactor, or an electric vibrator to output vertical impact force and vibration force to the conformal compaction plate 34.

[0030] A floating pressing seat 33 is disposed between the compaction power unit 32 and the conforming compaction plate 34. The floating pressing seat 33 includes an upper pressing plate 331, a lower pressing plate 332, and a vertical guide post 333 connecting the upper pressing plate 331 and the lower pressing plate 332. The upper pressing plate 331 is connected to the compaction power unit 32, and the lower pressing plate 332 is connected to the rigid compaction base plate 341 in the conforming compaction plate 34. The vertical guide post 333 is used to limit the relative offset between the upper pressing plate 331 and the lower pressing plate 332, so that the compaction force output by the compaction power unit 32 is transmitted vertically to the rigid compaction base plate 341. Thus, even if the slewing seat 31 changes its horizontal angle due to the conforming action, the compaction power unit 32 can still transmit effective compaction force to the rigid compaction base plate 341 through the floating pressing seat 33.

[0031] The conformal compaction plate 34 includes a rigid compaction base plate 341, an elastic contact element 342, and a rigid pressure strip 343. The rigid compaction base plate 341 is used to directly contact and compact the edge filler layer 5, and it adopts a steel plate, wear-resistant alloy plate, or a combination of steel plate and wear-resistant base plate. The elastic contact element 342 is located on the obstacle-prone side of the rigid compaction base plate 341, which refers to the side of the conformal compaction plate 34 close to the curb, trench sidewall, manhole edge, or pipeline protection structure. The elastic contact element 342 extends laterally from the obstacle-prone side of the rigid compaction base plate 341 beyond the edge of the lower pressure plate 332 of the floating pressure seat 33, so that the elastic contact element 342 contacts the boundary structure 4 before the rigid compaction base plate 341 when the conformal compaction plate 34 approaches the boundary structure 4.

[0032] A rigid pressure strip 343 is connected to the back side of the elastic contact element 342. The rigid pressure strip 343 is connected to the eccentric force arm 312 on the rotary seat 31 via a contact force transmission element 344. The eccentric force arm 312 is offset relative to the vertical axis 311, that is, a force arm is formed between the eccentric force arm 312 and the vertical axis 311. When the elastic contact element 342 is subjected to lateral pressure from the boundary structure 4, the elastic contact element 342 undergoes elastic deformation and pushes the rigid pressure strip 343. The rigid pressure strip 343 applies a lateral pushing and pulling force to the eccentric force arm 312 through the contact force transmission element 344. This lateral pushing and pulling force is converted into a torque that causes the rotary seat 31 to rotate around the vertical axis 311 through the eccentric force arm 312, thereby causing the contour tamping plate 34 to adjust its angle according to the contour of the boundary structure 4.

[0033] In this process, the elastic contact element 342 serves to initiate contact, prevent impact, and trigger conformal compaction, while the rigid compaction base plate 341 undertakes the main vertical compaction function. Since the elastic contact element 342 does not cover the area of ​​the rigid compaction base plate 341 that is primarily compacted, it does not significantly weaken the vertical impact or vibration compaction effect of the rigid compaction base plate 341 on the edge filler layer 5. Compared to a single flexible compaction plate, the conformal compaction plate 34 in this embodiment can maintain high edge compaction efficiency while protecting the boundary structure 4.

[0034] In use, the traveling body 1 moves along the edge of the curb or ditch, and the laterally telescopic tamping arm 2 extends the conforming tamping end 3 above the edge filler layer 5. After the tamping power unit 32 is started, it transmits tamping force to the rigid tamping base plate 341 through the floating pressing seat 33 to tampe the edge filler layer 5. When the boundary structure 4 has curves, protrusions, or local misalignments, the elastic contact element 342 first contacts and is pressed against the boundary structure 4, and then drives the rotary seat 31 to rotate through the contact force transmission element 344, so that the edge of the conforming tamping plate 34 on the obstacle side changes angle with the boundary contour. Thus, the conforming tamping plate 34 can automatically adapt to changes in the boundary contour without relying on frequent manual adjustments to the overall machine posture, and reduces the direct impact of the rigid tamping base plate 341 on the boundary structure 4.

[0035] Example 2 Based on Example 1, in order to solve the problem that the cantilever distance increases after the profile compaction end 3 extends and the end is prone to shaking, thus affecting the compaction accuracy at the edge, this example further optimizes the transverse telescopic compaction arm 2.

[0036] See Figure 1The lateral telescopic tamping arm 2 includes a fixed arm cylinder 21, a telescopic arm 22, a telescopic drive component 23, a guide slider 24, and a locking component. The fixed arm cylinder 21 is fixedly connected to one side of the traveling machine body 1, and the telescopic arm 22 slides through the fixed arm cylinder 21. An end mounting seat 25 is located at the outer end of the telescopic arm 22. The telescopic drive component 23 is a hydraulic cylinder or an electric screw drive component. One end of the telescopic drive component 23 is connected to the fixed arm cylinder 21, and the other end is connected to the telescopic arm 22, used to drive the telescopic arm 22 to extend or retract laterally.

[0037] A guide slider 24 and a guide groove 241 extending along the telescopic direction are provided between the fixed boom 21 and the telescopic boom 22. Specifically, the fixed boom 21 has a guide slider 24 at its end, and the telescopic boom 22 has a guide groove 241 extending along the telescopic direction. The guide slider 24 and the guide groove 241 cooperate with each other to limit the twisting and swaying of the telescopic boom 22 during the telescopic process. The guide slider 24 and the guide groove 241 can be set into two sets, one vertically and one horizontally, along the circumference of the end of the fixed boom 21 and the circumference of the telescopic boom 22, respectively, so that the telescopic boom 22 can maintain good guiding stability when subjected to the vertical impact load and lateral contact load of the conformal compaction end 3.

[0038] The locking element is installed in the oil circuit or electrical control circuit of the telescopic drive component 23. When the telescopic drive component 23 is a hydraulic cylinder, the locking element is a hydraulic lock, a balance valve, or a one-way locking valve; when the telescopic drive component 23 is an electric lead screw, the locking element is an electromagnetic brake or a self-locking threaded transmission pair. During compaction, the locking element restricts the telescopic arm 22 from retracting due to impact reaction force, ensuring the stability of the coverage position of the conformal compaction end 3 in the area adjacent to the boundary.

[0039] With the above structure, the lateral telescopic tamping arm 2 can deliver the contour tamping end 3 to the edge filling layer 5 without the walking body 1 being close to the boundary structure 4, and maintain a stable lateral position during the tamping process, avoiding the edge area from being missed due to the telescopic arm 22 retracting or shaking.

[0040] Example 3 Based on Embodiment 1 or Embodiment 2, in order to solve the problem that excessive free rotation of the rotary seat 31 causes the contour rammer plate 34 to swing, deflect at an excessive angle, or deviate from the working direction, this embodiment provides an angle limiting component, a reset component 315, and a damping component 316 between the rotary seat 31 and the transverse telescopic rammer arm 2.

[0041] See Figures 2 to 4The angle limiting component includes an arc-shaped limiting groove 313 and a limiting pin 314. The arc-shaped limiting groove 313 is disposed on the rotary seat 31, and the limiting pin 314 is disposed on the upper end of the damping member 316 and within the trajectory of the arc-shaped limiting groove 313. When the rotary seat 31 rotates around the upper end of the damping member 316, the limiting pin 314 blocks the end of the arc-shaped limiting groove 313, thereby preventing the rotation of the rotary seat 31. The two ends of the arc-shaped limiting groove 313 are used to limit the maximum rotation angle of the rotary seat 31.

[0042] In one specific embodiment, the maximum rotation angle of the slewing seat 31 relative to the initial angle is ±15° to ±45°, preferably ±30°. This angle range can meet the contouring requirements of the curved section of the curb, the slight deviation of the sidewall of the ditch and the local misalignment, while avoiding excessive deflection of the contouring tamping plate 34, which would affect the direction of travel.

[0043] The reset assembly 315 is connected between the rotary seat 31 and the damping element 316. The reset assembly 315 is a torsion spring reset element, with one end connected to the rotary seat 31 and the other end connected to the upper end of the damping element 316. When the elastic contact element 342 is subjected to lateral pressure, the rotary seat 31 overcomes the elastic force of the reset assembly 315 and the resistance of the damping element 316 and rotates slowly. When the elastic contact element 342 disengages from the boundary structure 4 or the lateral pressure decreases, the reset assembly 315 drives the rotary seat 31 to gradually return to the initial angle, so that the contour tamping plate 34 returns to a state suitable for straight-line travel.

[0044] The rotary seat 31 is assembled from multiple detachable parts for the embedded installation of the damping element 316. The rotary seat 31 has a connecting groove at its upper center and an arc-shaped limiting groove 313 on its upper side. The upper end of the damping element 316 connects to the end mounting seat 25 via the connecting groove. The upper part of the rotary seat 31 is slidably connected to the upper end of the damping element 316, and the lower end of the damping element 316 connects to the lower part of the rotary seat 31. A sliding connection is formed between the upper part of the rotary seat 31 and the upper end of the damping element 316 via ball bearings, and a transmission connection is formed between the lower end of the damping element 316 and the rotary seat 31. Damping is provided between the upper and lower ends of the damping element 316. Specifically, the damping element 316 is a disc-shaped rotary damper or a rubber damping block, used to reduce the rotational speed of the rotary seat 31 when subjected to instantaneous lateral impact. The damping element 316 can prevent the elastic contact element 342 from hitting the protruding part of the boundary structure 4 and causing the contour tamping plate 34 to swing rapidly, thereby improving the stability of the compaction at the edge.

[0045] Example 4 Based on Example 1, in order to solve the problem that the elastic contact element 342 must both prevent rigid impacts and reliably transmit conformal displacement, this example further optimizes the elastic contact element 342, the rigid pressure strip 343, and the contact force transmission element 344.

[0046] See Figure 3 and Figure 4 The elastic contact element 342 is a strip-shaped polyurethane contact element extending along the traveling direction of the rigid compacted base plate 341, with a Shore hardness of 70A-95A, preferably 80A-90A. This hardness range enables the elastic contact element 342 to have a buffering capacity when in contact with curb stones, manhole covers, or trench sidewalls, while also being able to transfer displacement to the rigid pressure strip 343 under continuous lateral pressure. The elastic contact element 342 is detachably installed on the rigid pressure strip 343 by screws, pressure plates, or dovetail groove structures. The rigid pressure strip 343 is detachably installed on the obstacle-prone side of the rigid compacted base plate 341 by screws, facilitating replacement after wear.

[0047] A rigid pressure strip 343 is disposed on the back side of the elastic contact element 342, and the rigid pressure strip 343 is embedded in the mounting groove on the back side of the elastic contact element 342. Since the elastic contact element 342 itself is a flexible part, if the contact force transmission element 344 is directly connected to the elastic contact element 342, local tearing or force transmission lag may easily occur. By setting the rigid pressure strip 343, the dispersed lateral contact force received by the elastic contact element 342 is gathered into a more stable push-pull displacement, and then transmitted to the eccentric force arm 312 through the contact force transmission element 344.

[0048] The contact force transmission component 344 includes a push-pull rod, one end of which is hinged to the rigid pressure bar 343, and the other end is hinged to the eccentric force arm 312. The hinged connection at both ends of the push-pull rod can accommodate changes in the relative angle between the rigid pressure bar 343 and the eccentric force arm 312, preventing the contact force transmission component 344 from jamming when the rotary seat 31 rotates. In other embodiments, the contact force transmission component 344 can also be a connecting rod, steel cable, slider connecting rod, or short-stroke hydraulic force transmission component, as long as it can convert the lateral compressive displacement of the elastic contact component 342 into the driving force of the eccentric force arm 312.

[0049] The elastic contact element 342 extends laterally beyond the edge of the lower pressing plate 332 of the floating pressing seat 33 by 20mm-60mm, preferably 30mm-45mm. If the extension distance is too small, the elastic contact element 342 cannot reliably contact the boundary structure 4 before the rigid compaction base plate 341; if the extension distance is too large, it will easily lead to an increase in the actual compaction distance between the conformal compaction plate 34 and the boundary structure 4, affecting the edge compaction effect. The lower surface of the elastic contact element 342 is naturally 1mm-5mm lower than the lower surface of the rigid compaction base plate 341, preferably 2mm-3mm. Therefore, the elastic contact element 342 can contact the boundary structure 4 and the ground protrusion obstacle before the rigid compaction base plate 341, so that the boundary structure 4 and the obstacle side of the rigid compaction base plate 341, and the ground protrusion obstacle and the lower surface of the rigid compaction base plate 341 maintain a certain distance. After being compressed, it forms a working bottom surface that is close to the rigid compaction base plate 341. The elastic contact element 342 is lower than the lower surface of the rigid compaction base plate 341, which reduces the impact damage when the rigid compaction base plate 341 encounters uneven ground, and at the same time reduces the impact on the main compaction area. The damping element 316 overcomes the rotational force brought by the elastic contact element 342 being lower than the lower surface of the rigid compaction base plate 341. It can only rotate when the side of the elastic contact element 342 bears a rotational force exceeding the damping force, thus reducing the directional malfunction of the rigid compaction base plate 341.

[0050] Example 5 Based on Example 1, in order to solve the problem of uneven surface of edge filler layer 5 or change in contact angle of conformal tamping plate 34 causing force transmission deviation of tamping power unit 32, this example further optimizes floating pressing seat 33.

[0051] See Figure 4 The floating pressing seat 33 also includes a pressing elastic element 334, which is sleeved on the outside of the vertical guide post 333 and abuts against the upper pressing plate 331 and the lower pressing plate 332. The pressing elastic element 334 is a helical compression spring, a disc spring assembly, or a rubber elastic block. There are multiple vertical guide posts 333, which are respectively arranged in the four corner areas of the upper pressing plate 331 and the lower pressing plate 332 to improve vertical guiding stability.

[0052] The pressing elastic element 334 allows the lower pressing plate 332 and the contouring tamping plate 34 to have a vertical floating stroke relative to the upper pressing plate 331. In one specific embodiment, the vertical floating stroke is 2mm-8mm, preferably 4mm-6mm. During the compaction operation, the pressing elastic element 334 absorbs the instantaneous reaction force generated by the contouring action of the contouring tamping plate 34 due to ground particles, local high points, or boundary contouring movements, while maintaining the pressing state between the upper pressing plate 331 and the lower pressing plate 332, so that the vertical compaction force output by the compaction power unit 32 is still stably transmitted to the rigid compaction base plate 341.

[0053] By setting the floating pressing seat 33, this embodiment enables the contouring tamping plate 34 to have a certain vertical self-adaptive capability while performing horizontal angle contouring, reducing the risk of the tamping power unit 32 bearing eccentric load, and improving the contact continuity between the rigid tamping base plate 341 and the edge filler layer 5.

[0054] Example 6 Based on Embodiment 1, in order to solve the problem that when the boundary structure 4 suddenly protrudes in front, turns at an angle or changes in arc, the elastic contact element 342 may have a delayed response after being passively contacted and then rotated, this embodiment provides a guide contact wheel 35 on the front side of the contour tamping plate 34 along the direction of travel.

[0055] See Figure 5 The guide wheel 35 is located on the obstacle-side of the rigid compaction base plate 341 and is connected to the rigid pressure strip 343 via the wheel frame 351. The outer edge of the guide wheel 35 protrudes outward relative to the obstacle-side edge of the rigid compaction base plate 341, and its protrusion distance is the same as or slightly larger than the lateral extension distance of the elastic contact element 342. When the traveling body 1 drives the contour compaction end 3 forward, the guide wheel 35 first contacts the protruding part or corner part of the boundary structure 4, and drives the rigid pressure strip 343 or the contact force transmission element 344 to generate pre-displacement through the wheel frame 351, thereby driving the rotary seat 31 to rotate in advance.

[0056] The guide wheel 35 is a rubber wheel, a polyurethane wheel, or a rubber-coated bearing wheel, with its axis arranged vertically or approximately vertically, allowing the guide wheel 35 to roll along the side of the boundary structure 4. Through the guide wheel 35, this embodiment reduces the probability of hard scraping between the elastic edge member 342 and the boundary structure 4, and allows the rotary seat 31 to adjust its angle in advance before reaching the boundary change point in the main compaction area of ​​the conformal compaction plate 34, improving the smoothness of continuous edge compaction.

[0057] Example 7 Based on Example 1, in order to address the problem that excessive lateral pressure may still cause damage to the boundary structure 4 when it is a brittle curb, precast manhole cover, or pipeline protection layer, this example includes a pressure detection element 36 and overload protection control logic.

[0058] See Figure 6The pressure detection element 36 is mounted on the contact edge force transmission element 344 or the rigid pressure strip 343. The pressure detection element 36 is a pressure sensor, tension / compression sensor, strain gauge sensor, or miniature load cell, used to detect the lateral resistance force transmitted from the elastic contact edge element 342 to the rigid pressure strip 343 or the contact edge force transmission element 344. The pressure detection element 36 is electrically connected to the controller 13 on the traveling body 1. The controller 13 is also electrically connected to the telescopic drive element 23 of the lateral telescopic tamping arm 2, the tamping power unit 32, and the traveling control system of the traveling body 1.

[0059] In one control method, the controller 13 presets a first lateral pressure threshold and a second lateral pressure threshold, where the second lateral pressure threshold is greater than the first lateral pressure threshold. When the lateral pressure detected by the pressure detection element 36 exceeds the first lateral pressure threshold, the controller 13 controls the traveling body 1 to reduce its travel speed or controls the compaction power unit 32 to operate with a lower load. When the lateral pressure exceeds the second lateral pressure threshold, the controller 13 controls the telescopic drive element 23 to retract the telescopic arm 22, or controls the contour compaction end 3 to rise, and stops the compaction power unit 32 if necessary. For example, the first lateral pressure threshold is set to 300N-500N, and the second lateral pressure threshold is set to 600N-900N. The specific thresholds are adjusted according to the curbstone material, the strength of the trench sidewall, and the hardness of the elastic contact element 342.

[0060] Through the pressure detection element 36 and the controller 13, this embodiment provides active overload protection in addition to the mechanical buffer of the elastic contact element 342 and the passive conforming of the rotary seat 31, so as to avoid damage to the structure caused by the operator's limited line of sight or excessive local protrusion of the boundary structure 4.

[0061] Example 8 Based on Example 1, in order to solve the problems that the rigid compaction base plate 341 may scratch the curb or trench sidewall near the obstacle side edge, and the problem that the installation height of the conformal compaction plate 34 is not adaptable under different filler thicknesses, this example further optimizes the rigid compaction base plate 341 and the height adjustment structure.

[0062] See Figure 7 The rigid compacted base plate 341 has a rounded transition edge 345 on the obstacle-side edge. The rounded transition edge 345 is formed by rounding the edge of the rigid compacted base plate 341, welding a rounded strip, or installing a curved guard edge. The rounded transition edge 345 reduces the scraping of sharp corners when the rigid compacted base plate 341 accidentally approaches the boundary structure 4, and together with the elastic contact edge member 342, forms a protective structure on the obstacle-side.

[0063] See Figure 8A wear-resistant base plate 346 is detachably connected to the underside of the rigid compacted base plate 341. The wear-resistant base plate 346 is connected to the lower surface of the rigid compacted base plate 341 by countersunk bolts, slots, or pressure plates. The wear-resistant base plate 346 is replaced separately after wear, thereby reducing maintenance costs. The lower surface of the wear-resistant base plate 346 is provided with shallow anti-slip textures or shallow ribs to improve contact friction with the edge filler layer 5, while avoiding excessive rib height that could disturb the filler.

[0064] Example 9 To verify the compaction effect of the present invention in the area near the boundary, in a specific application example, the graded crushed stone backfill layer behind the curb was selected as the test object. The single-layer paving thickness of the backfill layer was 180mm, and the moisture content was controlled within the range of the optimum moisture content ±2%. The test road sections included continuous straight curb sections, curved curb sections, and local misalignment sections. The test group used the road compaction equipment described in Examples 1 to 8 to carry out edge compaction operations. The walking machine 1 travels along the length of the curbstone, and the lateral telescopic compaction arm 2 extends 0.6m-0.8m. The rigid compaction base plate 341 of the contour compaction plate 34 has a width of 300mm, and the elastic contact piece 342 extends 35mm beyond the edge of the lower pressing plate 332 of the floating pressing seat 33. The contour compaction plate 34 maintains a dynamic edge clearance of 30mm-80mm with the side of the curbstone. The compaction power unit 32 adopts an eccentric excitation form with an excitation frequency of 45Hz-65Hz, and the traveling speed of the walking machine 1 is 0.5km / h-1.2km / h.

[0065] A control group was set up. Specifically, the control group used the same walking machine body 1, the same lateral telescopic tamping arm 2, the same tamping power unit 32, and the same excitation frequency and travel speed as the experimental group. The difference was that the control group replaced the conformal tamping end 3 with a regular rigid flat plate tamping end that did not have the elastic contact element 342, rigid pressure strip 343, contact force transmission element 344, damping element 316, floating pressure seat 33, conformal tamping plate 34, and passive conformal function of the slewing seat 31. Both the experimental and control groups were operated under the same filler type, the same paving thickness, the same moisture content range, the same construction section length, and the same number of tamping passes.

[0066] During compaction testing, the experimental and control groups used the same testing method, the same testing depth, and the same test point arrangement. Specifically, a test section was set up every 2m along the direction of travel in each test section. Each test section used the inner edge of the curbstone as a reference, and test points were set at positions 30mm, 60mm, and 100mm away from the inner edge of the curbstone, respectively. The test point positions were kept in a one-to-one correspondence between the experimental and control groups. All test points were located within the same testing depth range of the compacted edge filler layer 5 to reduce compaction deviation caused by different sampling positions.

[0067] The test results show that, under the same control variables and the same layout of test points, after using the equipment of this invention, the compaction degree of each test point within 100mm of the curbside is 96.1%-97.0%; while in the control group, after using the ordinary rigid plate compaction end, the compaction degree of each test point within 100mm of the curbside is 92.8%-94.5%. Meanwhile, in the curved curb section and the local misaligned section, the elastic contact edge component 342 of the test group can contact the curbside before the rigid compaction base plate 341, and through the rigid pressure strip 343, the contact edge force transmission component 344, and the eccentric force arm 312, drive the rotary seat 31 to rotate around the vertical axis 311, causing the contour compaction plate 34 to adjust its angle according to the boundary contour; in the control group, because the ordinary rigid plate compaction end lacks the above-mentioned contact edge contour structure, a larger safety gap needs to be reserved to avoid bumping the curb, resulting in a weakened compaction effect in the edge area near the curb.

[0068] The above test data are used to illustrate the application effect of the present invention under specific conditions of filler, moisture content, paving thickness, excitation frequency, travel speed, and test point layout, and do not constitute a limitation on the scope of protection of the present invention. Those skilled in the art can make adaptive adjustments to the lateral expansion distance, excitation frequency, travel speed, hardness of the elastic contact element 342, and lateral pressure threshold according to the filler type, construction layer thickness, boundary structure material, and compaction requirements.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A road compaction device, comprising a traveling body, a transverse telescopic compaction arm, and a contour compaction end head disposed at the end of the transverse telescopic compaction arm, characterized in that, The conformal compaction end includes a rotary seat rotatably connected to the transverse telescopic compaction arm about a vertical axis, a compaction power unit installed on the rotary seat, a floating pressing seat, and a conformal compaction plate. The floating pressing seat includes an upper pressing plate connected to the compaction power unit, a lower pressing plate connected to the rigid compaction base plate in the conformal compaction plate, and a vertical guide column connecting the upper pressing plate and the lower pressing plate. The conformal compaction plate also includes an elastic contact edge component disposed on the obstacle-side of the rigid compaction base plate and a rigid pressure strip connected to the back side of the elastic contact edge component. The elastic contact edge component extends laterally beyond the edge of the floating pressing seat from the obstacle-side of the rigid compaction base plate. The rigid pressure strip is connected to an eccentric force arm offset relative to the vertical axis on the rotary seat through a contact edge force transmission component, so that when the elastic contact edge component is subjected to lateral pressure, it drives the rotary seat to rotate around the vertical axis and keeps the rigid compaction base plate receiving the vertical compaction force of the compaction power unit.

2. The road compaction equipment according to claim 1, characterized in that, The lateral telescopic tamping arm includes a fixed arm cylinder, a telescopic arm that slides through the fixed arm cylinder, and a telescopic drive for driving the telescopic arm to extend and retract laterally relative to the fixed arm cylinder. A guide slider and a guide groove extending along the telescopic direction are provided between the fixed arm cylinder and the telescopic arm. The oil circuit or electrical control circuit of the telescopic drive is provided with a locking component for restricting the telescopic arm from retracting during the tamping operation.

3. The road compaction equipment according to claim 1, characterized in that, An angle limiting component and a reset component are provided between the rotary base and the transverse telescopic tamping arm. The angle limiting component includes an arc-shaped limiting groove and a limiting pin extending into the arc-shaped limiting groove. The reset component is connected between the rotary base and the transverse telescopic tamping arm.

4. The road compaction equipment according to claim 3, characterized in that, A damping element is also provided between the rotary seat and the transverse telescopic tamping arm. One end of the damping element is connected to the transverse telescopic tamping arm, and the other end is connected to the rotary seat. It is used to reduce the swing speed of the rotary seat when it is instantaneously pressed by the elastic contact edge.

5. The road compaction equipment according to claim 1, characterized in that, The elastic contact edge is a strip-shaped polyurethane contact edge extending along the traveling direction of the rigid compacted base plate. The rigid pressure strip is embedded in the back side of the elastic contact edge. The contact edge force transmission component includes a push-pull rod with one end hinged to the rigid pressure strip, and the other end of the push-pull rod hinged to the eccentric force arm.

6. The road compaction equipment according to claim 5, characterized in that, The elastic contact element extends 20mm-60mm beyond the edge of the floating pressing seat, and the lower surface of the elastic contact element is 1mm-5mm lower than the lower surface of the rigid compacted base plate in its natural state, so that the elastic contact element contacts the boundary structure before the rigid compacted base plate and forms a working bottom surface that tends to be flush with the rigid compacted base plate after being compressed.

7. The road compaction equipment according to claim 1, characterized in that, The floating pressing seat also includes a pressing elastic element sleeved on the outside of the vertical guide column. The pressing elastic element abuts between the upper pressing plate and the lower pressing plate, so that the conforming tamping plate has a vertical floating stroke relative to the compaction power unit.

8. The road compaction equipment according to claim 1, characterized in that, The rammed plate is provided with a guide wheel on the front side along the direction of travel. The guide wheel is located on the obstacle side of the rigid rammed base plate and is connected to the rigid pressure strip through a wheel frame. It is used to guide the slewing seat to rotate in advance before the elastic edge member contacts the boundary structure.

9. The road compaction equipment according to claim 1, characterized in that, A pressure detection element is provided on the contact force transmission component or the rigid pressure strip, and a controller is provided on the walking body. The controller is electrically connected to the pressure detection element, the lateral telescopic tamping arm and the tamping power unit, and is used to control the lateral telescopic tamping arm to retract, control the tamping power unit to unload, or control the contour tamping end to lift when the lateral resistance detected by the pressure detection element exceeds a set threshold.

10. The road compaction equipment according to claim 1, characterized in that, The rigid compacted base plate has an arc transition edge on the obstacle side edge, and a wear-resistant base plate is detachably connected to the bottom of the rigid compacted base plate.

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