Earthwork spreading device

Abstract

This invention discloses an earthmoving paving device, comprising a cylindrical body, a connecting crossbar, a tie rod, a push-pull handle, and casters. The cylindrical body includes a front cylindrical plate, a rear cylindrical plate, and side cylindrical plates connected between the two ends of the front and rear cylindrical plates. The upper end of the front cylindrical plate is lower than the upper ends of the rear and side cylindrical plates. The lower end of the rear cylindrical plate and the lower part of the side cylindrical plates form a soil outlet. Reinforcing ribs are connected to the outer surfaces of at least the front and rear cylindrical plates. The connecting crossbar is connected to the outer reinforcing ribs of the front cylindrical plate. The tie rod is connected between the front and rear cylindrical plates. One end of the push-pull handle is connected to the rear cylindrical plate. The casters are connected to the reinforcing ribs on both sides of the front cylindrical plate, or to the lower end of the side cylindrical plates. This invention has a simple structure, low cost, and low pollution, and can at least replace some heavy-duty paving machinery for earthmoving operations.

Description

Technical Field

[0001] This invention relates to the field of roadbed construction machinery technology, specifically to an earthwork paving device. Background Technology

[0002] Currently, during the earthwork and pavement mixture filling and paving phases, dump trucks are primarily used to transport earth to the roadbed construction site for unloading. After all earthwork is removed from the entire road section to be constructed, bulldozers are used to level the earth or building materials (spread them evenly), followed by compaction. The construction site requires the use of numerous heavy construction machines such as bulldozers, dump trucks, and water trucks. This not only generates significant amounts of dust and safety hazards but also results in substantial fuel consumption, exhaust emissions, and high construction costs.

[0003] Although dump trucks can be used to dump soil along the construction road section where soil is to be unloaded, which can achieve a certain paving effect, it is difficult to operate and cannot spread the soil evenly along the paving surface. Bulldozers are still needed for subsequent paving.

[0004] During the earthwork paving phase, ensuring construction efficiency while reducing the use of heavy construction machinery is of great value in improving the construction environment and reducing management and construction costs. Summary of the Invention

[0005] The purpose of this invention is to provide an earthmoving paving device that is simple in structure, low in cost, and low in pollution, and can at least replace some heavy paving machinery for earthmoving paving operations.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides an earthwork paving device, comprising a cylinder, a connecting crossbar, a tie rod, a push-pull handle, and casters.

[0008] The cylinder includes a front cylinder plate, a rear cylinder plate, and a side cylinder plate connected between the two ends of the front cylinder plate and the rear cylinder plate. The upper end of the front cylinder plate is lower than the upper end of the rear cylinder plate and the side cylinder plate. The lower end of the rear cylinder plate and the lower part of the side cylinder plate form a soil outlet. At least the front cylinder plate and the rear cylinder plate are connected to the outside with reinforcing ribs.

[0009] The hanging crossbar is connected at both ends to the upper part of the reinforcing rib in the middle of the outer side of the front cylinder plate;

[0010] The tie rod is connected between the front cylinder plate and the rear cylinder plate, and is used to limit the distance between the front cylinder plate and the rear cylinder plate;

[0011] One end of the push-pull armrest is connected to the reinforcing rib in the middle of the rear cylinder plate;

[0012] The casters are connected to the reinforcing ribs on both sides of the front cylinder plate, or to the lower front of the side cylinder plate.

[0013] Preferably, the cylindrical plate, the rear cylindrical plate, and the side cylindrical plates are made of thin steel plate material by stamping.

[0014] Preferably, the number of casters is two.

[0015] Preferably, the earthwork paving device further includes multiple pressure switches, an audio system, and a power supply control module. The multiple pressure switches are connected at different heights inside the cylinder. When the pressure switch is squeezed, the circuit can be connected, and when it is not squeezed, the circuit can be disconnected.

[0016] The power supply control module is connected to one end of the push-pull armrest near the cylinder. The power supply control module has pre-stored the corresponding pressure switch numbers, for example, the pressure switches from bottom to top are numbered 1, 2, 3, etc., and the power supply control module is electrically connected to the speaker and the pressure switches.

[0017] The speaker is connected below the power supply control module. When multiple pressure switches are squeezed by the soil, the speaker announces the number of the uppermost squeezed switch under the control of the power supply control module, so as to inform the driver of the current amount of soil in the cylinder.

[0018] Preferably, the earthwork paving device further includes an installation pipe, a vibrating element, a sealing sleeve sealingly connected between the vibrating element and the installation pipe, and a tension spring. The installation pipe includes a pipe body, with a vibrating element insertion hole on the upper part of one end of the pipe body, a connection hole on the upper part of the side of the pipe body, and an insulating fixing block connected to the lower part of the inner side of the end of the pipe body away from the vibrating element insertion hole. A conductive spring is connected to the insulating fixing block, and one end of the conductive spring is electrically connected to the power supply control module. The pipe body is connected between the upper parts of the front cylinder plate and the rear cylinder plate through its two ends.

[0019] The vibrating element includes a protruding rod portion and a cavity portion. A shaft hole is provided between the protruding rod portion and the cavity portion, and the shaft hole is connected to the connecting hole via a shaft. A vibrator is connected inside the cavity portion, and a conductive contact piece electrically connected to one electrode of the vibrator is connected to the outside of the cavity portion. The other electrode of the vibrator is connected to the power supply control module via a wire. When the conductive contact piece moves with the cavity portion, it can contact the other end of the conductive spring piece, thereby realizing the power-on start of the vibrator.

[0020] One end of the tension spring is connected to the lower end of the vibrating element, and the other end is connected to the front cylinder plate, or to the end of the mounting tube near the front cylinder plate.

[0021] Preferably, the push-pull armrest includes two parallel grip bars.

[0022] Preferably, the push-pull armrest further includes a crossbar connected between the grips.

[0023] Preferably, the rear cylinder plate is provided with a reinforcing groove.

[0024] Preferably, the lower end of the side cylinder plate near the rear cylinder plate is provided with a side convex plate.

[0025] Preferably, the rear end of the side convex plate is curved upwards.

[0026] Preferably, the connecting crossbar is connected to a quick-connect component, which includes a clamping joint, an automatic trailer hook (existing product), a movable clamp slidably connected to the lower part of the clamping joint, a movable clamp adjusting nut threaded to the movable clamp and rotatably connected at one end to the clamping joint, a sliding seat movably connected to the rear of the clamping joint, a telescopic rod connected between the sliding seat and the automatic trailer hook, and a limiting screw threaded on the sliding seat and the telescopic rod. The upper end of the clamping joint is provided with a fixed clamp. The automatic trailer hook is detachably connected to the connecting crossbar. The fixed clamp and the movable clamp are used to engage and hold the tail crossbeam connected to the rear of the dump truck.

[0027] Preferably, a C-shaped component is connected to the top of the automatic trailer hook, which allows for the use of tools such as pry bars to be inserted between the C-shaped component and the unlocking post at the upper end of the automatic trailer hook. Pressing down the unlocking post releases the automatic trailer hook from the hooking crossbar.

[0028] Preferably, the quick-connect component further includes a stiffening plate, which is connected between the sliding seat and the telescopic rod to enhance the stability between the sliding seat and the telescopic rod.

[0029] Due to the adoption of the above technical solutions, the advantages of this invention are as follows:

[0030] 1. In use, the earthwork paving device provided by the present invention can collect the soil dumped by the dump truck into the cylinder, which greatly reduces the dust generated during the earthwork unloading process. Furthermore, during the earthwork paving device of the present invention, the soil in the cylinder slowly slides down the inner surface of the cylinder as the dump truck moves, and finally spreads out flatly from the soil outlet, thus avoiding the generation of dust.

[0031] 2. The earthwork paving device provided by the present invention can use the power of the dump truck that transports the earthwork to pave the earthwork. The present invention does not require the setting of a power and transmission system, so the structure of the present invention can be simpler and the cost can be significantly reduced.

[0032] 3. The earthwork paving device provided by the present invention is applied in the earthwork paving construction stage, which can reduce or replace the use of paving machinery such as bulldozers, and plays an outstanding role in improving the construction environment and reducing management and construction costs;

[0033] 4. The earthwork paving device provided by the present invention is equipped with a pressure switch, a power supply control module and an audio system, which can indicate the amount of earthwork in the cylinder and prompt the dump truck driver to operate. In addition, the included cylinder also has the function of buffering the earthwork unloaded from the dump truck, further realizing the stability of paving quality during the earthwork paving process.

[0034] 5. When the dump truck is dumping soil, the vibrating component included in this invention will press down on the protruding part of the vibrating component from under the truck bed, causing the vibrating component to start. The vibration of the vibrating component enables the soil to be unloaded into the cylinder more smoothly and gradually at a smaller dumping angle. On the other hand, it can make the vibration distribution of the soil in the cylinder more uniform and also promote the smooth spreading of the soil in the cylinder to avoid blockage.

[0035] 6. The quick-connect fitting included in this invention is easy to adjust and can be adapted to the connection of more vehicle models. When a dump truck connected with the quick-connect fitting of this invention reverses, automatic engagement can be achieved when the connecting crossbar touches the trigger in the automatic trailer hook on the quick-connect fitting, making the connection convenient. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a side view schematic diagram of Embodiment 1 of the earthwork paving device provided by the present invention;

[0038] Figure 2 for Figure 1 A top-down view;

[0039] Figure 3 A side view schematic diagram of Embodiment 2 of the earthwork paving device provided by the present invention;

[0040] Figure 4 A side view schematic diagram of embodiment 3 of the earthwork paving device provided by the present invention;

[0041] Figure 5 for Figure 4 A left-view diagram;

[0042] Figure 6 for Figure 4A top-down view;

[0043] Figure 7 for Figure 6 A three-dimensional structural diagram of the mounting tube in the middle;

[0044] Figure 8 for Figure 6 A three-dimensional structural diagram of the vibrating component in the image;

[0045] Figure 9 A side view of Embodiment 3 of the earthwork paving device provided by the present invention, showing the connection between the device and the rear of the dump truck via a quick-connect fitting.

[0046] Figure 10 for Figure 9 A side view of the carriages in the middle of the train when they are tilted over;

[0047] Figure 11 for Figure 10 A side view of the quick-connect component;

[0048] Figure 12 for Figure 11 A left-side view diagram.

[0049] In the diagram: 1. Shaft; 2. Conductive spring; 3. Hanging crossbar; 4. Reinforcing rib; 5. Pressure switch; 6. Pull rod; 7. Tension spring; 8. Wire; 9. Caster; 10. Cylinder; 11. Front cylinder plate; 12. Side cylinder plate; 121. Side protruding plate; 13. Rear cylinder plate; 131. Upper baffle; 132. Reinforcing groove; 20. Vibrating element; 21. Protruding rod part; 22. Cavity part; 23. Shaft hole; 24. Vibrator; 25. Conductive contact; 30. Power supply control module; 40. Push-pull handrail; 41. Handrail; 42. Crossbar; 50. Mounting tube; 51. Tube body; 511. Vibrating element insertion hole; 512. Connection hole 52. Insulating fixing block; 60. Sealing sleeve; 70. Soil inlet; 80. Soil outlet; 90. Quick connector; 91. Clamping joint; 911. Fixed clamp; 912. Slide rail; 92. Moving clamp; 93. Moving clamp adjusting screw; 94. Limit screw; 95. Sliding seat; 96. Telescopic rod; 97. Rib plate; 98. Automatic trailer hook; 981. Trigger; 982. Connection port; 983. Unlocking post; 984. C-shaped piece; 100. Soil paving device; 200. Paved soil; 300. Rear of dump truck; 301. Truck body; 302. Rear door of truck body; 303. Tail crossbeam; 400. Audio system. Detailed Implementation

[0050] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," "outer," "left," "right," "front," and "rear" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use, 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, and therefore should not be construed as a limitation of this invention.

[0051] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0052] The specific implementation method is described below:

[0053] Embodiment 1 of the earthwork paving device provided by the present invention, see [link to embodiment]. Figure 1 , Figure 2 It includes a cylinder body 10, a connecting crossbar 3, a pull rod 6, a push-pull handrail 40, and two casters 9.

[0054] The cylinder 10 includes a front cylinder plate 11, a rear cylinder plate 13, and a side cylinder plate 12 connecting the two ends of the front cylinder plate 11 and the rear cylinder plate 13. The upper end of the front cylinder plate 11 is lower than the upper end of the rear cylinder plate 13 and the side cylinder plate 12. The rear cylinder plate 13 is provided with a reinforcing groove 132. The lower end of the rear cylinder plate 13 and the lower part of the side cylinder plate 12 form a soil outlet 80. The front cylinder plate 11 and the rear cylinder plate 13 are both connected to the outside of reinforcing ribs 4. The lower end of the side cylinder plate 12 near the rear cylinder plate 13 is provided with a side protrusion 121. The cylinder plate 11, the rear cylinder plate 13, and the side cylinder plate 12 are made of thin steel plate material by stamping.

[0055] The hanging crossbar 3 is connected at both ends to the upper part of the reinforcing rib 4 in the middle of the outer side of the front cylinder plate 11;

[0056] The tie rod 6 is connected between the front cylinder plate 11 and the rear cylinder plate 13, and is used to limit the distance between the front cylinder plate 11 and the rear cylinder plate 13;

[0057] The push-pull armrest 40 includes a crossbar 42 and two parallel grip bars 41. The crossbar 42 is connected between the grip bars 41, and one end of the two grip bars 41 is connected to the reinforcing rib 4 in the middle of the rear cylinder plate 13.

[0058] The caster 9 is connected to the lower front of the side plate 12.

[0059] Embodiment 2 of the earthwork paving device provided by the present invention, see [link to embodiment]. Figure 3Based on the earthwork paving device described in Embodiment 1 above, it is further connected with 3 pressure switches 5, an audio 400 and a power supply control module 30. The 3 pressure switches 5 are connected at different heights inside the front cylinder plate 11.

[0060] The speaker 400 is connected below the power supply control module 30;

[0061] The power supply control module 30 is connected to one end of the push-pull handrail 40 near the cylinder 10, and the power supply control module 30 is connected to the speaker 400 and the pressure switch 5 through wires. When the pressure switch 5 is squeezed by soil, the pressure switch 5 connects the circuit, and the power supply control module 30 controls the speaker 400 to broadcast the number of the pressure switch 5 at the top that was squeezed.

[0062] Embodiment 3 of the earthwork paving device provided by the present invention, see [link to embodiment]. Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 Based on the earthwork paving device described in Embodiment 2 above, it is further connected with an installation pipe 50, a vibrating element 20, a sealing sleeve 60 sealingly connected between the vibrating element 20 and the installation pipe 50, and a tension spring 7. The installation pipe 50 includes a pipe body 51. A vibrating element insertion hole 511 is provided on the upper part of one end of the pipe body 51. A connection hole 512 is provided on the upper part of the side of the pipe body 51. An insulating fixing block 52 is connected to the lower part of the inner side of the end of the pipe body 51 away from the vibrating element insertion hole 511. A conductive spring 2 is connected to the insulating fixing block 52. One end of the conductive spring 2 is electrically connected to the power supply control module 30. The pipe body 51 is connected between the upper parts of the front cylinder plate 11 and the rear cylinder plate 13 through its two ends.

[0063] The vibrating element 20 includes a protruding rod portion 21 and a cavity portion 22. A shaft hole 23 is provided between the protruding rod portion 21 and the cavity portion 22. The shaft hole 23 is connected to the connecting hole 512 via a shaft 1. A vibrator 24 is connected inside the cavity portion 22. A conductive contact 25 electrically connected to one electrode of the vibrator 24 is connected to the outside of the cavity portion 22. When the conductive contact 25 moves with the cavity portion 22, it can contact the other end 2 of the conductive spring. The other electrode of the vibrator 24 is connected to the power supply control module 30 via a wire 8.

[0064] One end of the tension spring 7 is connected to the lower end of the vibrating element 20, and the other end is connected to the front cylinder plate 11.

[0065] An embodiment of the quick-connect fitting 90 provided by the present invention is shown below. Figure 9 , Figure 10 , Figure 11 , Figure 12 The system includes a clamping connector 91, an automatic trailer hook 98, a movable clamp 92 slidably connected to the lower part of the clamping connector 91, a movable clamp adjusting nut 93 threaded to the movable clamp 92 and rotatably connected to the clamping connector 91 at one end, a sliding seat 95 movably connected to the rear of the clamping connector 91, a telescopic rod 96 connected between the sliding seat 95 and the automatic trailer hook 98, a stiffening plate 97 connected between the sliding seat 95 and the telescopic rod 96, and a limiting screw 94 threaded on the sliding seat 95 and the telescopic rod 96. The upper end of the clamping connector 91 is provided with a fixed clamp 911. The automatic trailer hook 98 is connected to a C-shaped part 984. The automatic trailer hook 98 can be connected to the hooking crossbar 3 through the connecting port 982. The movable clamp 92 and the fixed clamp 911 are used to tighten the connection to the tail crossbeam 303 of the rear of the dump truck 300.

[0066] The earthwork paving principle of this invention:

[0067] The earthwork spreading device 100 provided by the present invention utilizes the extrusion port 80 of the cylinder 10 to compress and spread the earthwork (similar to carrying a woven bag by hand, where the granular material inside the bag is spread out from the bag opening at a certain thickness). The extrusion port 80 of the present invention is made of a rigid material with a fixed shape, which has a better shaping effect on the earthwork discharged from the extrusion port 80. Combined with the earthwork containing, buffering and releasing function of the cylinder 10, the auxiliary unloading function of the vibrating element 20, and the remaining earthwork in the cylinder 10, the earthwork spreading is achieved.

[0068] The adjustment principle of the quick-connect fitting provided by this invention is as follows:

[0069] The distance between the fixed chuck 911 and the movable chuck 92 can be adjusted by turning the chuck adjusting screw 93; the height of the sliding seat 95 on the clamping joint 91 can be adjusted and locked by turning the limit screw 94, and the length of the telescopic rod 96 can be adjusted and locked.

[0070] Method of using the earthwork paving device provided by this invention:

[0071] S1. Tighten the chuck adjusting screw 93 to clamp the fixed chuck 911 and moving chuck 92 of the quick connector 90 to the tail crossbeam 303 of the dump truck tail 300. Then push the present invention to the front cylinder plate 11 slightly below the tail end of the truck body 301. Adjust the telescopic rod 96 and sliding seat 95 until the trigger 981 can touch the hanging crossbeam 3. Adjust it so that the middle of the connection port 982 is basically at the same height and aligned with the middle of the hanging crossbeam 3.

[0072] S2. The construction worker holds the handle 41 and pushes the invention to the section of road to be paved, with the connecting crossbar 3 facing the direction of the dump truck to unload the soil.

[0073] S3. Construction personnel assist and guide the dump truck driver to reverse until the trigger 981 in the connection port 982 of the quick-connect piece 90 touches the hook crossbar 3, and the pin of the automatic trailer hook 98 falls down to lock the hook crossbar 3 in the connection port 982.

[0074] S4. Open the rear door 302 of the dump truck, and the dump truck driver gradually raises the truck body 301 to unload the soil. When the audio 400 announces the number of the pressure switch 5 in the middle, the dump truck driver stops raising one end of the truck body 301 and controls the vehicle to slowly move forward to drag the invention for paving operations. During the movement of the dump truck, the driver gradually adjusts the raising of the truck body 301 according to the prompts of the audio 400 to ensure that the soil in the cylinder 10 does not overflow or break during the paving process.

[0075] S5. When unloading is basically complete, the construction personnel instruct the driver to stop the vehicle. Then, the construction personnel use a pry bar to press down the unlocking column 983, contacting the quick-connect piece 90 and the connecting crossbar 3. The above operation can be repeated for the next paving operation. After all paving work is completed, the quick-connect piece 90 is removed from the tail crossbeam 303 and then hooked onto the connecting crossbar 3 via the automatic trailer hook 98.

[0076] The above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is impossible to exhaustively list all possible implementations here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. An earth paving device (100) characterized by: It includes a cylinder (10), a connecting crossbar (3), a pull rod (6), a push-pull handrail (40), and casters (9). The cylinder (10) includes a front cylinder plate (11), a rear cylinder plate (13), and a side cylinder plate (12) connecting the two ends of the front cylinder plate (11) and the rear cylinder plate (13). The upper end of the front cylinder plate (11) is lower than the upper end of the rear cylinder plate (13) and the side cylinder plate (12). The lower end of the rear cylinder plate (13) and the lower part of the side cylinder plate (12) form a soil outlet (80). At least the front cylinder plate (11) and the rear cylinder plate (13) are connected to the outside of the reinforcing ribs (4). The hanging crossbar (3) is connected at both ends to the upper part of the reinforcing rib (4) in the middle of the outside of the front cylinder plate (11); The tie rod (6) is connected between the front cylinder plate (11) and the rear cylinder plate (13) to define the distance between the front cylinder plate (11) and the rear cylinder plate (13); One end of the push-pull armrest (40) is connected to the reinforcing rib (4) in the middle of the rear cylinder plate (13); The caster (9) is connected to the reinforcing ribs (4) on both sides of the front cylinder plate (11), or to the lower front of the side cylinder plate (12); The earthwork paving device (100) also includes multiple pressure switches (5), an audio device (400), and a power supply control module (30), wherein the multiple pressure switches (5) are connected to different height positions inside the cylinder (10); The speaker (400) is connected below the power supply control module (30); The power supply control module (30) is connected to one end of the push-pull armrest (40) near the cylinder (10), and the power supply control module (30) is electrically connected to the speaker (400) and the pressure switch (5); The earthwork paving device (100) also includes an installation pipe (50), a vibrating element (20), a sealing sleeve (60) sealingly connected between the vibrating element (20) and the installation pipe (50), and a tension spring (7). The installation pipe (50) includes a pipe body (51). A vibrating element insertion hole (511) is provided on the upper part of one end of the pipe body (51). A connecting hole (512) is provided on the upper part of the side of the pipe body (51). An insulating fixing block (52) is connected to the lower part of the inner side of the end of the pipe body (51) away from the vibrating element insertion hole (511). A conductive spring (2) is connected on the insulating fixing block (52). One end of the conductive spring (2) is electrically connected to the power supply control module (30). The pipe body (51) is connected between the upper parts of the front cylinder plate (11) and the rear cylinder plate (13) through its two ends. The vibrating element (20) includes a protruding rod portion (21) and a cavity portion (22). A shaft hole (23) is provided between the protruding rod portion (21) and the cavity portion (22). The shaft hole (23) is connected to the connecting hole (512) via a shaft (1). A vibrator (24) is connected inside the cavity portion (22). A conductive contact (25) electrically connected to one electrode of the vibrator (24) is connected to the outside of the cavity portion (22). When the conductive contact (25) moves with the cavity portion (22), it can contact the other end of the conductive spring (2). The other electrode of the vibrator (24) is connected to the power supply control module (30) via a wire (8). One end of the tension spring (7) is connected to the lower end of the vibrating element (20), and the other end is connected to the front cylinder plate (11), or to the end of the mounting tube (50) near the front cylinder plate (11).

2. The earth paving device (100) according to claim 1, characterized in that: The push-pull armrest (40) includes two parallel grip bars (41).

3. The earth paving device (100) according to claim 2, characterized in that: The push-pull armrest (40) also includes a crossbar (42) connected between the grips (41).

4. The earth paving device (100) of claim 1, wherein: The number of casters (9) is 2.

5. The earthwork paving device (100) as described in claim 1, characterized in that: The rear cylinder plate (13) is provided with a reinforcing groove (132).

6. The earthwork paving device (100) as described in claim 1, characterized in that: The side cylinder plate (12) has a side protrusion plate (121) at its lower end near the rear cylinder plate (13).

7. The earthwork paving device (100) as described in claim 1, characterized in that: The hook-and-connector (3) is connected to a quick-connect component (90), which includes a clamp (91), an automatic trailer hook (98), a movable clamp (92) slidably connected to the lower part of the clamp (91), a movable clamp adjusting nut (93) threaded to the movable clamp (92) and rotatably connected to the clamp (91) at one end, a sliding seat (95) movably connected to the rear of the clamp (91), a telescopic rod (96) connected between the sliding seat (95) and the automatic trailer hook (98), and a limiting screw (94) threaded to the sliding seat (95) and the telescopic rod (96). The upper end of the clamp (91) is provided with a fixed clamp (911), and the automatic trailer hook (98) is detachably connected to the hook-and-connector (3).

8. The earthwork paving device (100) as described in claim 7, characterized in that: The automatic trailer hitch (98) is connected to a C-shaped piece (984).

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