A high-speed road construction tamping device

Abstract

The application belongs to the technical field of road construction, and particularly discloses a high-speed road construction tamping device, which comprises a square frame, rollers arranged at the bottom of four corners of the square frame, a motor arranged on the square frame, a plurality of track arms driven to rotate by the motor, and a strip-shaped heavy hammer capable of sliding on the track arms, track grooves are arranged on opposite surfaces of the two track arms, the strip-shaped heavy hammer is arranged between the two track arms, both ends of the strip-shaped heavy hammer are provided with sliding blocks which are slidably connected to the track grooves, and the device further comprises a fixing disc which is fixed to the motor and located outside the two groups of track arms, and the inside of the fixing disc is provided with a first trigger and a second trigger. The device controls the reciprocating movement of the multiple groups of heavy hammers in an arc-shaped stroke, and automatically releases the heavy hammers at the stroke vertex, so that the potential energy of the heavy hammers is converted into huge impact kinetic energy for continuous tamping operation. The device has high impact energy of the heavy hammer tamping and the maneuverability of the small equipment, and effectively solves the problem of the vertical degree of tamping under the slope working condition.

Description

Technical Field

[0001] This invention belongs to the field of road construction technology, specifically referring to a compaction device for highway construction. Background Technology

[0002] With the rapid development of my country's highway network, expressways have become the arteries of the national economy. To ensure their continuous, safe, and efficient operation, routine maintenance and repair are crucial. During maintenance, it is often necessary to repair localized pavement damage and subsidence caused by heavy traffic, material aging, or foundation changes. A key step in the repair process is to compact the backfilled base, subbase, or surface layer materials to ensure the compaction degree, load-bearing capacity, and long-term stability of the repaired area. Currently, the compaction equipment used for such small-scale, point-based maintenance operations is mainly handheld or miniature impact rammers and plate compactors. These devices utilize eccentric blocks driven by internal combustion engines or electric motors to generate high-frequency, low-amplitude vibrations to compact the materials. Their advantages lie in their small size, light weight, and maneuverability, making them suitable for operations in confined spaces. However, in long-term engineering practice, the existing technology has the following technical shortcomings that urgently need improvement:

[0003] The working principle of high-frequency vibratory compaction equipment determines that its single impact energy is relatively low, and the force is mainly concentrated on the surface layer, resulting in unsatisfactory compaction effect on deeper materials. For highway subgrade or base course repairs requiring high compaction, its compaction energy and depth of influence often fail to meet specifications, potentially leading to insufficient compaction in the repaired area. In contrast, heavy-duty drop hammer compactors (commonly known as "dynamic compaction machines") used for large-area foundation treatment can provide enormous impact energy and achieve deep compaction, but their large and cumbersome structure requires large lifting and load-bearing machinery, resulting in extremely poor mobility and making them completely unsuitable for the localized, rapid repair scenarios in highway maintenance. Therefore, existing technologies present an irreconcilable contradiction between providing high impact energy and ensuring operational flexibility.

[0004] The intense mechanical vibrations generated by high-frequency vibratory compaction equipment during operation are transmitted directly to the operator's arms and even the entire body through components such as handrails and control levers without any attenuation. If operators work in this vibration environment for extended periods, they are highly susceptible to occupational diseases such as "arm vibration syndrome," which seriously damages their physical and mental health.

[0005] In highway route design, curves often have a certain slope, and the shoulders also have a certain slope. If the traditional gravity compaction principle (for example, using a lifted hammer to fall freely) is used, the direction of the compaction force is always vertically downward due to gravity. This means that the compaction force is decomposed into an effective compaction force perpendicular to the road surface and an ineffective component force tangential to the road surface. This force decomposition not only wastes impact energy, but also causes the compacted surface to be non-parallel to the designed road surface, damaging the smoothness of the repaired area. Summary of the Invention

[0006] To address the above issues, this invention provides a high-speed road construction compaction device. Through a power-driven cyclic lifting and release mechanism, multiple sets of hammers reciprocate within an arc-shaped stroke and automatically disengage at the apex of the stroke. Their potential energy is converted into enormous impact kinetic energy for continuous compaction. This device combines the high impact energy of hammer compaction with the maneuverability of a small device, effectively solving the verticality problem of compaction on sloping surfaces and fundamentally avoiding the health hazards of high-frequency vibration to operators.

[0007] The technical solution adopted by the present invention is as follows: The present invention proposes a high-speed road construction compaction device, including a square frame, rollers at the bottom of the four corners of the square frame, a motor on the square frame, multiple track arms driven by the motor to rotate, and a strip-shaped weight that can slide on the track arms.

[0008] Furthermore, the motors are symmetrically arranged on the inner sides of the opposite frames of the square frame, and multiple rail arms on the same side as the motors are arranged in an umbrella-shaped structure along the central circumference of the rail arms. The output ends of the two motors are coaxially connected to the central axis of the two sets of spaced-apart umbrella-shaped structures formed by the rail arms.

[0009] Furthermore, the two side rail arms have rail grooves on their opposite surfaces, and the strip-shaped weights are positioned between the two opposite rail arms. The two ends of the strip-shaped weights are provided with sliders that are slidably connected in the rail grooves. The number of strip-shaped weights is equal to the number of rail arms on one side.

[0010] Furthermore, the device also includes a fixed plate fixed to the motor and located outside the two sets of track arms, with a first trigger and a second trigger provided on the inner side of the fixed plate.

[0011] Furthermore, each end of the track arm is provided with a weight-accumulating lifting mechanism and a weight-locking and releasing mechanism. The weight-locking and releasing mechanism includes a second locking block that locks into the slider and a second releasing rod that cooperates with the second trigger. The weight-accumulating lifting mechanism includes a lifting rod that abuts against the slider and a first releasing rod that cooperates with the first trigger.

[0012] Furthermore, the counterweight locking and releasing mechanism also includes a third spring seat, a third tension spring, and a connecting rod. The third spring seat is fixedly connected to the second locking block, and the third tension spring is connected between the track arm and the third spring seat. The connecting rod is connected between the second release rod and the third spring seat, and is used to drive the third spring seat to move so that the second locking block leaves the track groove when the second release rod contacts the second trigger. The second locking block can penetrate the track arm and enter the track groove.

[0013] Furthermore, the weight-collecting lifting mechanism also includes a first locking block, a second spring seat, a limiting block, and a second tension spring. The first locking block can penetrate the track arm and enter the track groove. The second spring seat is fixedly connected to the first locking block. The second tension spring is connected between the track arm and the second spring seat. The limiting block is fixedly connected to the second spring seat and is located on the movement path of the lifting rod.

[0014] Furthermore, the track arm is also provided with a fixed first spring seat and a first tension spring connected between the first spring seat and the lifting rod. The lifting rod is fixedly connected to the first release rod. When the lifting rod is reset under the action of the first tension spring, it can be blocked by the limiting block. The first release rod always passes through the track arm and faces the fixed plate during movement.

[0015] Furthermore, the umbrella-shaped structure formed by the track arm has a notch at its center caused by the track groove, and the length of the slider is greater than the length of the notch to avoid track deviation; the weight storage and lifting mechanism is located between the end of the track arm and the first spring seat, and the weight engagement and release mechanism is located between the weight storage and lifting mechanism and the first spring seat.

[0016] Furthermore, the fixed plate is provided with a sleeve, the motor passes through the fixed plate and the sleeve is fitted onto the motor, the sleeve is provided with a fastening bolt, and the fastening bolt threaded through the sleeve and abuts against the outer shell of the motor.

[0017] Furthermore, the ends of the first and second locking blocks that extend into the track groove are both provided with chamfers facing the center of the track arm, which are used to push the first and second locking blocks out of the track groove when the slider moves from one end of the track groove to the other end.

[0018] Furthermore, each connecting rod is arranged in pairs; one end of each pair of rods is rotatably connected to the second release rod, and the other end is rotatably connected to the third spring seat and the track arm, respectively.

[0019] Furthermore, in the rotation path along the track arm, the first trigger is positioned before the second trigger; the first trigger has an inclined surface that pushes the first release rod outward toward the direction away from the center of the fixed plate, and the second trigger has an inclined surface that presses the second release rod inward toward the direction closer to the center of the fixed plate.

[0020] The beneficial effects achieved by the present invention using the above structure are as follows:

[0021] (1) The present invention combines the rail arm with the strip hammer and uses the motor to drive the rail arm to cyclically lift and release the strip hammer, which gives the device excellent flexibility and converts the potential energy of the hammer into huge impact kinetic energy, thus achieving efficient compaction of the deep layers of the road surface. This design successfully integrates the flexibility of small equipment with the high impact energy of heavy compaction equipment, effectively solving the contradiction between high impact energy and operational flexibility in the prior art.

[0022] (2) The compaction impact of the present invention is generated by the falling of a strip-shaped hammer in the track groove. The entire power and execution mechanism are integrated on the square frame. The impact force acts directly on the ground. The operator only needs to push and guide the entire device without holding the vibrating parts. This fundamentally isolates the operator from the high-frequency vibration source and completely avoids the risk of occupational diseases such as "arm vibration syndrome" caused by long-term exposure to strong mechanical vibration. This greatly protects the physical and mental health of the workers.

[0023] (3) The present invention cleverly solves the problem of compaction under inclined conditions. Since the strip hammer and its slider are always constrained to move in the track groove of the track arm, its impact direction must be perpendicular to the track arm. When working on the slope, it is only necessary to ensure that the end section of the track arm that releases the hammer is perpendicular to the slope, so that the impact force is completely perpendicular to the working surface. This avoids the damage to the flatness of the repair area caused by traditional gravity compaction and ensures the construction quality under any slope.

[0024] (4) By setting up multiple sets of strip hammers and driving them by motors to circumferentially circulate on the umbrella-shaped track arm, the present invention achieves continuous and rapid compaction operation. Unlike traditional gravity rammers that require a complete lifting and lowering waiting time after a single impact, the multiple strip hammers of the present invention alternately perform the action of "lifting-locking-releasing-compacting". While one hammer is compacting, other hammers are in the lifting or waiting-to-release stage, thus forming an uninterrupted impact flow, which greatly improves construction efficiency and can achieve seamless and complete rapid coverage of the target area. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of a high-speed road construction compaction device proposed in this invention.

[0026] Figure 2 This is a side view of a highway construction compaction device proposed in this invention.

[0027] Figure 3 This is a top view of a highway construction compaction device proposed in this invention.

[0028] Figure 4 for Figure 3 Enlarged view of section A in the middle.

[0029] Figure 5 for Figure 1 Enlarged view of section B.

[0030] Figure 6 This is an exploded structural diagram showing the positional relationship between the hammer accumulating and lifting mechanism and the hammer engaging and releasing mechanism of a high-speed road construction compaction device proposed in this invention.

[0031] Figure 7 This is a diagram showing the working trajectory of the slider of a high-speed road construction compaction device proposed in this invention during the downward impact.

[0032] Figure 8 This is a diagram showing the working trajectory of the first release rod and the first triggering element when the first release rod of the high-speed road construction compaction device proposed in this invention comes into contact.

[0033] Figure 9 This is a diagram showing the working trajectory of the second release rod and the second triggering element of a high-speed road construction compaction device proposed in this invention.

[0034] Figure 10 This is a side view of a highway construction compaction device proposed in this invention during slope operation.

[0035] Among them, 1. Square frame, 11. Roller, 2. Motor, 3. Fixed plate, 31. Sleeve, 32. Fastening bolt, 4. Track arm, 41. Track groove, 42. First spring seat, 5. Strip-shaped weight, 51. Slider, 6. Lifting rod, 61. First tension spring, 7. Weight storage and lifting mechanism, 71. First locking block, 72. Second spring seat, 73. Limiting block, 74. Second tension spring, 75. First release rod, 76. First trigger, 8. Weight locking and releasing mechanism, 81. Second locking block, 82. Third spring seat, 83. Third tension spring, 84. Connecting rod, 85. Second release rod, 86. Second trigger.

[0036] 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. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 As shown, the present invention proposes a high-speed road construction compaction device. The overall frame of the device is composed of a square frame 1, which is sturdy and stable and provides a mounting base for other components. Rollers 11 are provided at the bottom of the four corners of the square frame 1, so that the entire device can be easily moved on the construction road surface.

[0040] The power system is the core drive unit of this device. Specifically, two motors 2 are symmetrically arranged on the inner sides of the two opposite frames of the square frame 1. The output end of each motor 2 is coaxially connected to a set of umbrella-shaped structures composed of multiple track arms 4 arranged in a circular array along the center of the track arm 4. In this way, the entire device has two sets of umbrella-shaped compaction units that are spaced apart, rotate synchronously and in the same direction. This symmetrical layout ensures that the device is subjected to balanced forces and runs smoothly during operation.

[0041] The compaction mechanism consists of a track arm 4 and a strip-shaped weight 5. The track arms 4 on both sides of the umbrella-shaped structure have track grooves 41 on their opposite surfaces. The strip-shaped weight 5 is horizontally positioned between the two opposite track arms 4, and has sliders 51 at both ends. The sliders 51 can slide and connect to the corresponding track grooves 41. The number of strip-shaped weights 5 is equal to the number of track arms 4 on one side, ensuring that each track arm 4 participates in the compaction cycle. Since multiple gaps are formed in the center of the umbrella-shaped structure, in order to prevent the strip-shaped weight 5 from leaving the predetermined track and entering the track grooves 41 of the adjacent track arm 4 when passing through the center position, the length of the slider 51 is designed to be greater than the length of the center gap, thereby ensuring the uniqueness and stability of its operation.

[0042] To precisely control the lifting and releasing of the bar-shaped weight 5, this device also includes a fixed trigger control system. This system includes a fixed plate 3, which is fixed to the motor 2 and located on the outside of the two sets of track arms 4. To achieve precise adjustment of the position and angle of the fixed plate 3, a sleeve 31 is provided on the fixed plate 3. The motor 2 passes through the fixed plate 3, and the sleeve 31 is fitted onto the motor 2. A fastening bolt 32 is provided on the sleeve 31. The fastening bolt 32 is threaded through the sleeve 31 and can abut against the housing of the motor 2. By adjusting the angle of the fixed plate 3 and locking the fastening bolt 32, the triggering timing can be precisely adjusted. On the inner side of the fixed plate 3, that is, the side facing the track arm 4, there is a first trigger 76 and a second trigger 86 for triggering subsequent actions.

[0043] At both ends of each track arm 4, a set of precise mechanical linkage mechanisms are symmetrically provided, including a weight storage and lifting mechanism 7 and a weight locking and releasing mechanism 8.

[0044] The function of the weight-collecting lifting mechanism 7 is to lift the bar weight 5 from the ground to a certain height after it has been compacted, so as to avoid interference with the ground during rotation and hinder its movement. The mechanism includes: a first locking block 71 that can pass through the track arm 4 perpendicularly and enter the track groove 41; a second spring seat 72 fixedly connected to the first locking block 71; a second tension spring 74 connected between the track arm 4 and the second spring seat 72; a limiting block 73 fixedly connected to the second spring seat 72 and located on the movement path of the lifting rod 6; and a first release rod 75 fixedly connected to the lifting rod 6. The lifting rod 6 is connected to the first spring seat 42 fixed on the track arm 4 through the first tension spring 61. The first release rod 75 always passes through the track arm 4 and faces the fixed plate 3 during movement.

[0045] The function of the counterweight locking and releasing mechanism 8 is to reliably lock the bar counterweight 5 after it is lifted to a predetermined height and unlock it instantly when it reaches the release point. The mechanism includes: a second locking block 81 that can also enter the track groove 41, a third spring seat 82 fixedly connected to the second locking block 81, a third tension spring 83 connected between the track arm 4 and the third spring seat 82, a connecting rod 84 for transmitting the action, and a second release rod 85 connected to the connecting rod 84. In order to achieve reliable action transmission, the connecting rod 84 is preferably set in pairs. One end of the two rods in each pair is rotatably connected to the second release rod 85, and the other end is rotatably connected to the third spring seat 82 and the track arm 4, respectively. Through this lever structure, the axial movement of the second release rod 85 can be efficiently converted into the lateral movement of the third spring seat 82, thereby controlling the second locking block 81 to enter and exit the track groove 41.

[0046] In order to achieve smooth unidirectional triggering, the ends of the first locking block 71 and the second locking block 81 that extend into the track groove 41 are provided with chamfers facing the center of the track arm 4. The function of the chamfer is that when the slider 51 moves along the track groove 41 from one end to the other end (i.e., the direction of compaction and falling), the first locking block 71 and the second locking block 81 can be pushed out of the track groove 41 in a smooth manner without generating rigid impact.

[0047] In terms of functional layout, the weight-collecting and lifting mechanism 7 is located between the end of the track arm 4 and the first spring seat 42, while the weight-locking and releasing mechanism 8 is located between the weight-collecting and lifting mechanism 7 and the first spring seat 42. Along the rotation path of the track arm 4, the first trigger 76 is located in front of the second trigger 86. Specifically, the first trigger 76 has an inclined surface that pushes the first release rod 75 outward away from the center of the fixed plate 3, while the second trigger 86 has an inclined surface that presses the second release rod 85 inward toward the center of the fixed plate 3.

[0048] The specific work process is as follows:

[0049] Initial stage of compaction and reset: The operator moves the device to the area to be compacted, starts the motor 2, and the two sets of umbrella-shaped track arms 4 begin to rotate synchronously. The operator manually pushes the entire device forward slowly through the rollers 11. Assuming that a bar hammer 5 is released just as the track arm 4 rotates to a near vertical position, it falls at high speed and hits the ground, completing the compaction operation. At this time, its huge impact energy is completely released. Because the height of the bar hammer 5 is greater than the height of the slider 51, it ensures that the compaction is not restricted by any rigid structure at the moment of impact. After the impact is completed, the bar hammer 5 stops on the ground. During the fall, the sliders 51 at both ends press over the chamfers of the second locking block 81 and the first locking block 71 in sequence with kinetic energy, pushing them out of the track groove 41. When the slider 51 presses over the first locking block 71, the limiting block 73 linked to it also moves away. When the slider 51 finally stops, it will contact and press the lifting rod 6.

[0050] Lifting off the ground and initial locking: After the compaction energy is released, the first tension spring 61, which is in a stretched state, begins to contract, lifting the bar hammer 5 and the slider 51 from the ground through the lifting rod 6. During the lifting process, the position of the slider 51 will always push the first locking block 71 out. Since the second locking block 81 has been reset under the action of the third tension spring 83, the slider 51 is firmly locked by the second locking block 81 during the lifting process, completing the initial locking. In the later stage of the lifting process, the slider 51 leaves the first locking block 71, but because the lifting rod 6 is close to the slider 51, the lifting rod 6 blocks the limiting block 73 when the slider 51 leaves the first locking block 71, preventing the first locking block 71 from resetting. Therefore, the limiting block 73 and the first locking block 71 are still in a state of being stretched to both sides.

[0051] Rotation, lifting, and resetting: Motor 2 drives the track arm 4 to continue rotating. The bar-shaped hammer 5, which has been locked by the second locking block 81, leaves the ground and is carried to a higher point by the circular motion. During this process, the next bar-shaped hammer 5 is performing a compaction action, achieving continuous operation. When the bar-shaped hammer 5 rotates to the middle of its stroke near the highest point, its first release rod 75 contacts the first trigger 76 on the fixed plate 3. The inclined surface of the first trigger 76 pushes the first release rod 75 outward, causing the lifting rod 6 to also move outward. The movement of the lifting rod 6 releases two constraints: First, the limiting block 73 is no longer blocked, and under the action of the second tension spring 74, the first locking block 71 is fully reset and enters the track groove 41; Second, when the first release rod 75 passes through the first trigger 76, the first tension spring 61 pulls the lifting rod 6 to reset, but at this time the reset stroke of the lifting rod 6 is blocked by the already reset limiting block 73, so that the lifting rod 6 returns to its initial charging and ready state.

[0052] Compaction Release: Immediately afterwards, when the track arm 4 rotates to a position close to vertical downward, the second release rod 85 contacts the second trigger 86. The inclined surface of the second trigger 86 presses the second release rod 85 inward. Through the linkage of the connecting rod 84, the third spring seat 82 is pulled, causing the second locking block 81 to instantly exit from the track groove 41. The constraint on the slider 51 is released, and the bar hammer 5 falls at high speed along the track groove 41 under the action of gravity, hitting the ground again to start the next cycle. By controlling the speed of the motor 2, the compaction frequency can be adjusted. Combined with the moving speed of the device, full coverage compaction of the target area without omissions or gaps can be achieved. At the same time, by adjusting the trigger position of the second trigger 86, the falling process of the bar hammer 5 is coordinated with the rotation of the track arm 4 to achieve a moment of contact with the road surface perpendicular to the road surface.

[0053] Slope operation: When operating on sloping roads (such as highway curves or shoulders), since the strip hammer 5 is always constrained within the track groove 41, its falling impact direction will always be parallel to the direction of the track arm 4. With the initial settings unchanged, it can be ensured that the track arm 4 is exactly perpendicular to the road slope at the moment of releasing the hammer, so that the compaction force is completely perpendicular to the slope, avoiding energy loss and damage to the flatness, and achieving high-quality vertical compaction of slopes at different angles.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

[0056] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A high-speed road construction compaction device, comprising a rectangular frame (1) and rollers (11) disposed at the bottom of the four corners of the rectangular frame (1), characterized in that: It also includes a motor (2) mounted on a square frame (1), multiple track arms (4) driven to rotate by the motor (2), and a strip-shaped weight (5) that can slide on the track arms (4). The motor (2) is symmetrically arranged on the inner side of the opposite frame of the square frame (1). Multiple track arms (4) on the same side as the motor (2) are arranged in an umbrella-shaped structure along the central circumference of the track arm (4). The output ends of the two motors (2) are coaxially connected to the central axis of the two sets of oppositely spaced umbrella-shaped structures formed by the track arms (4). The two side rail arms (4) have rail grooves (41) on opposite surfaces. The bar-shaped weights (5) are located between the two opposite rail arms (4). The two ends of the bar-shaped weights (5) are provided with sliders (51) that are slidably connected in the rail grooves (41). The number of bar-shaped weights (5) is equal to the number of single-side rail arms (4). It also includes a fixed plate (3) fixed to the motor (2) and located outside the two sets of track arms (4), and the fixed plate (3) is provided with a first trigger (76) and a second trigger (86) on its inner side; Each of the two ends of the track arm (4) is provided with a weight storage and lifting mechanism (7) and a weight engagement and release mechanism (8). The weight engagement and release mechanism (8) includes a second locking block (81) that engages with the slider (51) and a second release rod (85) that cooperates with the second trigger (86). The weight storage and lifting mechanism (7) includes a lifting rod (6) that abuts against the slider (51) and a first release rod (75) that cooperates with the first trigger (76). The second locking block (81) can penetrate the track arm (4) and enter the track groove (41). The lifting rod (6) is fixedly connected to the first release rod (75). The first release rod (75) always penetrates the track arm (4) and faces the fixed plate (3) during movement. In the rotation path along the track arm (4), the first trigger (76) is located before the second trigger (86); the first trigger (76) has an inclined surface that pushes the first release rod (75) outward toward the center of the fixed plate (3), and the second trigger (86) has an inclined surface that presses the second release rod (85) inward toward the center of the fixed plate (3).

2. The highway construction compaction device according to claim 1, characterized in that: The counterweight locking and releasing mechanism (8) further includes a third spring seat (82), a third tension spring (83), and a connecting rod (84). The third spring seat (82) is fixedly connected to the second locking block (81), the third tension spring (83) is connected between the track arm (4) and the third spring seat (82), and the connecting rod (84) is connected between the second release rod (85) and the third spring seat (82).

3. The highway construction compaction device according to claim 2, characterized in that: The weight-storage lifting mechanism (7) further includes a first locking block (71), a second spring seat (72), a limiting block (73), and a second tension spring (74). The first locking block (71) can pass through the track arm (4) and enter the track groove (41). The second spring seat (72) is fixedly connected to the first locking block (71). The second tension spring (74) is connected between the track arm (4) and the second spring seat (72). The limiting block (73) is fixedly connected to the second spring seat (72) and is located on the movement path of the lifting rod (6).

4. The highway construction compaction device according to claim 3, characterized in that: The track arm (4) is also provided with a fixed first spring seat (42) and a first tension spring (61) connected between the first spring seat (42) and the lifting rod (6). When the lifting rod (6) is reset under the action of the first tension spring (61), it can be blocked by the limiting block (73).

5. The highway construction compaction device according to claim 4, characterized in that: The umbrella-shaped structure formed by the track arm (4) has a gap caused by the track groove (41) at its center. The length of the slider (51) is greater than the length of the gap to avoid track slippage. The weight storage and lifting mechanism (7) is located between the end of the track arm (4) and the first spring seat (42). The weight engagement and release mechanism (8) is located between the weight storage and lifting mechanism (7) and the first spring seat (42).

6. The highway construction compaction device according to claim 5, characterized in that: The fixed plate (3) is provided with a sleeve (31), the motor (2) passes through the fixed plate (3) and the sleeve (31) is sleeved on the motor (2), the sleeve (31) is provided with a fastening bolt (32), the fastening bolt (32) is threaded through the sleeve (31) and then abuts against the outer shell of the motor (2).

7. A highway construction compaction device according to claim 6, characterized in that: The first locking block (71) and the second locking block (81) both have a chamfer at one end that extends into the track groove (41) and faces the center of the track arm (4).

8. A highway construction compaction device according to claim 7, characterized in that: The connecting rods (84) are arranged in pairs; one end of each pair of rods is rotatably connected to the second release rod (85), and the other end is rotatably connected to the third spring seat (82) and the track arm (4).

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