Tamping and compacting device for road and bridge roadbed construction

Abstract

The invention discloses a tamping and compacting device for road and bridge roadbed construction, and belongs to the field of road and bridge roadbed construction equipment.The tamping and compacting device comprises a frame and a diesel engine set arranged on the rear side of the upper portion of the frame, a transmission case is installed on the outer surface of one side of the frame, and the diesel engine set and the transmission case are connected through a belt and a belt pulley; a supporting frame is fixedly connected to the front side of the upper surface of the vehicle frame, sliding frames are fixedly connected to the front surface of the vehicle frame, and a tamping block is jointly connected between the sliding frames in a sliding mode. According to the device, the tamping force of the tamping block can be adjusted through the lifting mechanism, when the device works in height limiting places such as a bridge opening or a tunnel, the extending frame can be folded, the overall height of the device is lowered, and the tightness adjusting unit can adjust the tightness of the chain and can also adjust the height of the chain when the height is adjusted. The situation that the chain is too loose or fractured due to the fact that the perimeter of the chain is changed in the total length limiting and adjusting process, normal adjustment is limited is prevented, and the stability can be improved through the transmission balance weight mechanism.

Description

Technical Field

[0001] The invention relates to the field of road bridge subgrade construction equipment, and more specifically to a tamping and compacting device for road bridge subgrade construction. Background Art

[0002] As a major category of construction projects such as highways, railways, and urban rail transit, roadbed engineering is indispensable in engineering construction from the perspective of reducing the overall cost of the project, functional requirements, and soil and stone allocation requirements. A tamping machine is a machine used for compaction. It is a compaction machine that uses impact and impact vibration to compact backfill soil in layers. It is mostly used for leveling and compacting the foundation during construction. The existing tamping and compacting devices require workers to constantly adjust the tamping position when used. For roads and bridges with a relatively large roadbed range, the use of workers to move the tamping and compacting devices significantly increases the labor intensity of the workers.

[0003] The existing tamping and compacting devices for road and bridge subgrade construction can use chains to drive the tamping blocks to repeatedly fall and compact the ground. This method is mostly seen in diesel tamping machines, which have a large compaction area and a fast speed. However, this type of device has a certain lifting height for the tamping blocks, and it is difficult to adjust the lifting height according to the required compaction strength. Moreover, when this type of device operates in height-restricted places such as bridge holes or tunnels, it is difficult for this type of device to adapt to different working environments by lowering the overall height. In addition, some existing adjustable height tamping devices use steel cables to reciprocate the tamping blocks for compaction operations. When the turning point height is increased, the tension on the rear side of the device will also increase, and the counterweight during operation will change. This phenomenon is similar to that of a tower crane. The higher the tower crane, the greater the counterweight required, and the device is prone to instability during the compaction process.

[0004] Therefore, a tamping and compacting device for road and bridge subgrade construction is proposed. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a tamping and compacting device for road and bridge subgrade construction, which can achieve.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A tamping and compacting device for road and bridge subgrade construction comprises a frame and a diesel engine unit arranged at the upper rear side of the frame, a transmission box is installed on the outer surface of one side of the frame, and the diesel engine unit and the transmission box are connected by a belt and a pulley, a support frame is fixedly connected to the front side of the upper surface of the frame, a slide is fixedly connected to the front surface of the frame, and a tamping block is slidably connected between the slides, a lifting mechanism is arranged above the frame, a chain is arranged on the outside of the lifting mechanism, two toggle blocks are installed on the outer surface of the chain, a lap block is fixedly connected to the upper side of the rear surface of the tamping block, and an extension unit is commonly arranged on the upper surfaces of the support frame and the slide.

[0008] Furthermore, the extension unit includes an extension frame rotatably connected to the support frame and the upper end of the slide, the lower end outer surface of the extension frame is fixedly connected with an ear, the outer surfaces of the upper ends of the support frame and the slide are both fixedly connected with an ear plate, and the ear is inserted between the two ear plates and fixed by bolts.

[0009] Furthermore, the lifting mechanism includes two first screw rods rotatably connected to the upper surface of the frame, the outer cylindrical surfaces of the first screw rods are threadedly connected to the first nut seats, the upper surfaces of the first nut seats are rotatably connected to the support rods, the inner surface of the support frame is slidably connected to the first cross bar, and the upper ends of the support rods are rotatably connected to the outer cylindrical surface of the first cross bar, the middle section of the first cross bar is rotatably connected to the first gear, the lower ends of the support rods are fixedly connected to the second cross bar, the middle section of the second cross bar is rotatably connected to the second gear, a tension adjustment unit is provided on the upper surface of the frame between the support frames, and a transmission counterweight mechanism is provided on the rear side of the upper surface of the frame.

[0010] Furthermore, the tension adjustment unit includes a lifting seat arranged between the support frames, and the lifting seat is fixedly connected to the middle position of the front side of the upper surface of the frame, the frame is slidably connected to a slider inside, and a first motor is fixedly connected to an outer surface of one side of the slider, an output end of the first motor passes through the slider and is fixedly connected to a third gear, and a chain is clamped on the outside of the first gear, the second gear, and the third gear, the upper surface of the lifting seat extends to the inside and is threadedly connected to an adjusting bolt, and the lower end of the adjusting bolt is rotatably connected to the upper surface of the slider.

[0011] Furthermore, the transmission counterweight mechanism includes a fixed seat fixedly connected to the rear side of the upper surface of the frame, the rear surface of the fixed seat is fixedly connected to a second motor, the output end of the second motor is fixedly connected to a fourth gear, the external meshing connection of the fourth gear is two fifth gears, and the fifth gear is fixedly connected to the rear end of the first screw rod, the front surface of the fourth gear is fixedly connected to a second screw rod, the outer cylindrical surface of the second screw rod is threadedly connected to a second nut seat, the external part of the second nut seat is fixedly connected to a counterweight block, the rear side of the inner surface of the frame is fixedly connected to a slide rail, and the counterweight block is arranged inside the slide rail.

[0012] Furthermore, two pulleys are rotatably connected to both sides of the lower surface of the counterweight block, and the pulleys are rollingly connected to the inside of the slide groove of the slide rail.

[0013] Furthermore, two rotating frames are rotatably connected to the front side of the lower surface of the frame, and the rotating frames are designed as one high and one low. The upper surface of the rear section of the rotating frame extends to the lower surface and is penetrated by sliding holes. The lower surface of the frame is located at the rear side of the rotating frame and is fixedly connected to an electric telescopic rod. The lower surface of the front end of the electric telescopic rod is fixedly connected to a buckle rod, and the buckle rod is inserted into the two sliding holes. A floor plate is provided on the inner side of the front end of the rotating frame, a height adjustment unit is provided between the rotating frame and the floor plate, and a dustproof unit is provided on one side of the upper surface of the floor plate that extends to the upper surface of the frame.

[0014] Furthermore, the height adjustment unit includes a screw threadedly connected to the front end of the rotating frame, the lower end of the screw is rotatably connected to a fixed block, the upper surface of the fixed block is fixedly connected to two limit rods, and the limit rods pass through the upper and lower surfaces of the rotating frame.

[0015] Furthermore, the dustproof unit includes a water tank fixedly connected to one side of the upper surface of the frame, a water pump is installed on the upper surface of the water tank, a mounting plate is provided on the upper surface of the floor plate, an atomizer pipe is fixedly connected to the outer surface of one side of the mounting plate, and the atomizer pipe and the water pump are connected by a hose.

[0016] Furthermore, two screw holes are provided on the upper surface of the floor plate, and the mounting plate is fixedly connected to the upper surface of the floor plate by screws.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is provided with a lifting mechanism and an extension unit. The lifting mechanism can adjust the compaction strength of the compaction block. When the device is operated in height-restricted places such as bridge holes or tunnels, the extension frame can be folded to lower the falling height of the compaction block and lower the overall height of the device. The tension adjustment unit can not only adjust the tightness of the chain, but also prevent the total length of the chain from limiting the change in the circumference during the adjustment process, causing the chain to be too loose or broken, and limiting normal adjustment. 2. The present invention sets a transmission counterweight mechanism, which can gradually adjust the counterweight of the frame by moving the counterweight block backward after the second gear and the rear chain move forward, so as to adjust the height and the counterweight ratio of the frame, thereby improving the stability during compaction operation; 3. The present invention can achieve a better soil-carrying effect by arranging a rotating frame, a sliding hole, an electric telescopic rod, a buckle rod, a cradle plate, and a height adjustment unit. The height adjustment unit cooperates with the transmission of the cradle plate to further improve the overall operation quality of the device. In addition, if the edge of the tamping block hits a stone or a gravel, it is easy to cause splashing. The cradle plate can well protect the personnel on both sides of the device; 4. The present invention is provided with a dustproof unit, a water tank, a water pump, a mounting plate and an atomizing pipe. If dust is easily generated when relatively dry land is compacted, the water pump can be turned on at this time. The water pump can pump out the water in the water tank and atomize it through the atomizing pipe to reduce dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 For the present invention Figure 1 A partial rear view stereoscopic structure diagram; Figure 3 For the present invention Figure 2 An enlarged structural diagram of the middle tension adjustment unit; Figure 4 For the present invention Figure 2 Schematic diagram of a partial three-dimensional structure; Figure 5 For the present invention Figure 4 Schematic diagram of the split three-dimensional structure at the middle slide rail; Figure 6 For the present invention Figure 2 A is a schematic diagram of the enlarged structure of the middle part; Figure 7 For the present invention Figure 1 A schematic diagram of a partial three-dimensional structure viewed from above; Figure 8 For the present invention Figure 7 A schematic diagram of the enlarged structure of B; Fig. 9 For the present invention Figure 2 Schematic diagram of the enlarged structure of C in the middle; Fig.10 For the present invention Fig. 9 Schematic diagram of the split three-dimensional structure at the middle mounting plate.

[0019] Description of the numbers in the figure: 1. Frame; 2. Diesel engine; 3. Transmission box; 4. Support frame; 5. Slide; 6. Tamping block; 7. Lifting mechanism; 71. First screw rod; 72. First nut seat; 73. Support rod; 74. First cross bar; 75. First gear; 76. Second cross bar; 77. Second gear; 78. Tension adjustment unit; 781. Lifting seat; 782. Sliding block; 783. First motor; 784. Third gear; 785. Adjusting bolt; 79. Transmission counterweight mechanism; 791. Fixed seat; 792. Second motor; 793. Fourth gear; 794. Fifth gear; 79 5. Second screw rod; 796. Second nut seat; 797. Counterweight block; 798. Slide rail; 799. Pulley; 8. Chain; 9. Toggle block; 10. Overlap block; 11. Extension unit; 111. Extension frame; 112. Plug ear; 113. Ear plate; 12. Rotating frame; 13. Sliding hole; 14. Electric telescopic rod; 15. Buckle rod; 16. Arm plate; 17. Height adjustment unit; 171. Screw rod; 172. Fixing block; 173. Limit rod; 18. Dustproof unit; 181. Water tank; 182. Water pump; 183. Mounting plate; 184. Atomizing pipe; 19. Screw hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention. Embodiment 1:

[0021] See also Figures 1 to 10 A tamping and compacting device for road and bridge subgrade construction comprises a frame 1 and a diesel engine set 2 arranged at the upper rear side of the frame 1. A transmission box 3 is installed on the outer surface of one side of the frame 1, and the diesel engine set 2 and the transmission box 3 are connected by a belt and a pulley. A support frame 4 is fixedly connected to the front side of the upper surface of the frame 1, a slide 5 is fixedly connected to the front surface of the frame 1, and a tamping block 6 is slidably connected between the slides 5. A lifting mechanism 7 is arranged above the frame 1, and a chain 8 is arranged on the outside of the lifting mechanism 7. Two toggle blocks 9 are installed on the outer surface of the chain 8. A lap block 10 is fixedly connected to the upper side of the rear surface of the tamping block 6, and an extension unit 11 is jointly arranged on the upper surface of the support frame 4 and the slide 5. The diesel engine set 2 on the frame 1 can provide power and electric energy for the device, and the transmission box 3 can drive the front wheel to drive forward. A universal wheel is installed on the rear side of the lower surface of the frame 1 for convenient direction adjustment.

[0022] like Figure 1-2 , Figure 6As shown, the extension unit 11 includes an extension frame 111 rotatably connected to the upper ends of the support frame 4 and the slide 5, and the lower end outer surface of the extension frame 111 is fixedly connected with an ear 112, and the upper end outer surfaces of the support frame 4 and the slide 5 are fixedly connected with an ear plate 113, and the ear 112 is inserted between the two ear plates 113 and fixed by bolts.

[0023] like Figure 1-2 As shown, the lifting mechanism 7 includes two first screw rods 71 ​​rotatably connected to the upper surface of the frame 1, the outer cylindrical surfaces of the first screw rods 71 ​​are threadedly connected to the first nut seats 72, the upper surfaces of the first nut seats 72 are rotatably connected to the support rods 73, the inner surface of the support frame 4 is slidably connected to the first cross bar 74, and the upper ends of the support rods 73 are rotatably connected to the outer cylindrical surface of the first cross bar 74, the middle section of the first cross bar 74 is rotatably connected to the first gear 75, the lower ends of the support rods 73 are fixedly connected with the second cross bar 76, the middle section of the second cross bar 76 is rotatably connected to the second gear 77, a tension adjustment unit 78 is provided on the upper surface of the frame 1 between the support frames 4, and a transmission counterweight mechanism 79 is provided on the rear side of the upper surface of the frame 1.

[0024] like Figure 2-3 As shown, the tension adjustment unit 78 includes a lifting seat 781 arranged between the support frames 4, and the lifting seat 781 is fixedly connected to the middle position of the front side of the upper surface of the frame 1, and a slider 782 is slidably connected inside the frame 1, and a first motor 783 is fixedly connected to the outer surface of one side of the slider 782, and the output end of the first motor 783 passes through the slider 782 and is fixedly connected to the third gear 784, and the chain 8 is clamped on the outside of the first gear 75, the second gear 77, and the third gear 784. The upper surface of the lifting seat 781 extends to the inside and is threadedly connected to an adjusting bolt 785, and the lower end of the adjusting bolt 785 is rotatably connected to the upper surface of the slider 782.

[0025] By adopting the above technical solution, the first motor 783 of the device can drive the third gear 784 to rotate. Under the limiting action of the first gear 75 and the second gear 77, the chain 8 can be transmitted. The vertical section of the chain 8 can drive the tamping block 6 to slide upward in the slide 5 by overlapping the toggle block 9 and the overlap block 10. After the toggle block 9 reaches the top, it will gradually break away from the lifting effect on the overlap block 10. The tamping block 6 falls with gravity to perform a tamping operation. When the tamping strength needs to be increased, the extension frame 111 can be rotated to stand up and the plug ear 112 can be inserted between the ear plate 113. The adjusting bolt 785 is used to fix the tamping block 6, and the adjusting bolt 785 is turned with a wrench to control the slider 782 to slide upward in the lifting seat 781, so that the third gear 784 is displaced upward to loosen the chain 8. At the same time, the two first screw rods 71 ​​are rotated, and the first screw rods 71 ​​can drive the first nut seat 72 to move forward. The support rod 73 can drive the first cross bar 74 to slide upward in the extension frame 111. This design can adjust the falling height of the tamping block 6. After determining the position, the third gear 784 can be adjusted to move downward again with a wrench to tighten the chain 8.

[0026] like Figure 1-2 , Figure 4-5 As shown, the transmission counterweight mechanism 79 includes a fixed seat 791 fixedly connected to the rear side of the upper surface of the frame 1, the rear surface of the fixed seat 791 is fixedly connected to the second motor 792, the output end of the second motor 792 is fixedly connected to the fourth gear 793, the outer part of the fourth gear 793 is meshed with two fifth gears 794, and the fifth gear 794 is fixedly connected to the rear end of the first screw rod 71, the front surface of the fourth gear 793 is fixedly connected to the second screw rod 795, the outer cylindrical surface of the second screw rod 795 is threadedly connected to the second nut seat 796, the outer part of the second nut seat 796 is fixedly connected to the counterweight block 797, the rear side of the inner surface of the frame 1 is fixedly connected to the slide rail 798, and the counterweight block 797 is arranged inside the slide rail 798, the thread direction of the second screw rod 795 is consistent with that of the first screw rod 71, but the second motor 792 drives the second screw rod 795 to turn in the opposite direction to the first screw rod 71.

[0027] By adopting the above technical solution, when adjusting the rotation of the first screw rod 71, the fourth gear 793 can be driven to rotate by the second motor 792, and the fourth gear 793 can drive the two fifth gears 794 to rotate, so as to achieve the purpose of synchronously rotating the first screw rod 71. While the fourth gear 793 rotates, it can drive the second screw rod 795 to rotate in the opposite direction, and drive the second nut seat 796 and the counterweight block 797 to gradually approach the rear side of the frame 1, so as to adjust the counterweight of the frame 1 and enhance stability.

[0028] like Figure 5 As shown, two pulleys 799 are rotatably connected to both sides of the lower surface of the counterweight block 797, and the pulleys 799 are rollingly connected to the inside of the slide groove of the slide rail 798.

[0029] By adopting the above technical solution, the friction between the counterweight block 797 and the slide rail 798 can be effectively reduced, and the load of the second motor 792 can be reduced. Embodiment 2:

[0030] like Figure 1-2 , Figure 7 As shown, two rotating frames 12 are rotatably connected to the front side of the lower surface of the frame 1, and the rotating frames 12 are designed as one high and one low. The upper surface of the rear section of the rotating frame 12 extends to the lower surface and is penetrated by sliding holes 13. The lower surface of the frame 1 is located at the rear side of the rotating frame 12 and is fixedly connected to an electric telescopic rod 14. The lower surface of the front end of the electric telescopic rod 14 is fixedly connected to a buckle rod 15, and the buckle rod 15 is inserted into the two sliding holes 13. The inner side of the front end of the rotating frame 12 is provided with a floor plate 16, and a height adjustment unit 17 is provided between the rotating frame 12 and the floor plate 16. The upper surface of the floor plate 16 extends to one side of the upper surface of the frame 1 and is provided with a dustproof unit 18. The lower end of the buckle rod 15 is designed as an anti-slip block.

[0031] like Figure 2 , Figure 7-8 As shown, the height adjustment unit 17 includes a screw rod 171 threadedly connected to the front end of the rotating frame 12, the lower end of the screw rod 171 is rotatably connected to a fixed block 172, the upper surface of the fixed block 172 is fixedly connected to two limit rods 173, and the limit rods 173 pass through the upper and lower surfaces of the rotating frame 12.

[0032] By adopting the above technical solution, during the tamping process, the soil will be squeezed around the indentation of the tamping block 6, causing the surrounding bulge, and the electric telescopic rod 14 is used to drive the buckle rod 15 to perform telescopic movement. During the telescopic process, the buckle rod 15 clamped in the sliding hole 13 can drive the two rotating frames 12 to rotate, and drive the raking plate 16 to rake the soil. The rotating screw 171 can drive the fixed block 172 to rise and fall under the limiting action of the limiting rod 173, and adjust the height of the lower surface of the raking plate 16, thereby adjusting the amount of soil raked.

[0033] like Figure 1-2 , Fig. 9 As shown, the dustproof unit 18 includes a water tank 181 fixedly connected to one side of the upper surface of the frame 1, a water pump 182 is installed on the upper surface of the water tank 181, a mounting plate 183 is provided on the upper surface of the floor plate 16, an atomizer pipe 184 is fixedly connected to the outer surface of one side of the mounting plate 183, and the atomizer pipe 184 and the water pump 182 are connected by a hose.

[0034] By adopting the above technical solution, if dust is easily generated when compacting relatively dry land, the water pump 182 can be turned on at this time. The water pump 182 can pump out the water in the water tank 181 and atomize it through the atomizing pipe 184 to reduce dust.

[0035] like Fig.10 As shown, two screw holes 19 are provided on the upper surface of the floor plate 16, and the mounting plate 183 is fixedly connected to the upper surface of the floor plate 16 by screws. The screw holes 19 facilitate the disassembly and installation of the atomizing tube 184, and facilitate subsequent maintenance and replacement.

[0036] Instructions for use: When using this device, the diesel generator set 2 can be used for driving and generating electricity. The lifting mechanism 7 can be adjusted according to the actual required tamping strength. The extension unit 11 can be used to extend or fold according to the usage scenario. The tightness of the chain 8 can be adjusted by adjusting the tension adjustment unit 78 with a wrench to prevent the chain 8 from breaking during the adjustment process and prevent the chain 8 from being too loose during the transmission process. When adjusting the lifting height of the tamping block 6, the transmission counterweight mechanism 79 can follow up to allow the device to operate stably after adjustment. The electric telescopic rod 14 can be used to carry out soil raking operations. The height adjustment unit 17 can be used to adjust the amount of soil raking. If there is a lot of dust during tamping, the dust prevention unit 18 can be used to reduce the dust.

[0037] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tamping and compacting device for road and bridge subgrade construction, comprising a frame (1) and a diesel engine unit (2) arranged above and behind the frame (1), characterized in that: A transmission box (3) is installed on the outer surface of one side of the frame (1), and the diesel engine set (2) and the transmission box (3) are connected via a belt and a pulley. A support frame (4) is fixedly connected to the front side of the upper surface of the frame (1). A slide frame (5) is fixedly connected to the front surface of the frame (1). A tamping block (6) is slidably connected between the slide frames (5). A lifting mechanism (7) is arranged above the frame (1). A chain (8) is arranged outside the lifting mechanism (7). Two toggle blocks (9) are installed on the outer surface of the chain (8). A lap block (10) is fixedly connected to the upper side of the rear surface of the tamping block (6). An extension unit (11) is commonly arranged on the upper surfaces of the support frame (4) and the slide frame (5).

2. A tamping and compacting device for road and bridge subgrade construction according to claim 1, characterized in that: The extension unit (11) comprises an extension frame (111) rotatably connected to the upper ends of the support frame (4) and the slide frame (5); an insert ear (112) is fixedly connected to the outer surface of the lower end of the extension frame (111); an ear plate (113) is fixedly connected to the outer surfaces of the upper ends of the support frame (4) and the slide frame (5); and the insert ear (112) is inserted between the two ear plates (113) and fixed by bolts.

3. A tamping and compacting device for road and bridge subgrade construction according to claim 1, characterized in that: The lifting mechanism (7) comprises two first screw rods (71) rotatably connected to the upper surface of the frame (1); the outer circumferential surfaces of the first screw rods (71) are threadedly connected to first nut seats (72); the upper surfaces of the first nut seats (72) are rotatably connected to support rods (73); the inner surface of the support frame (4) is slidably connected to a first cross bar (74); the upper ends of the support rods (73) are rotatably connected to the outer circumferential surfaces of the first cross bars (74); the middle sections of the first cross bars (74) are rotatably connected to a first gear (75); the lower ends of the support rods (73) are fixedly connected to a second cross bar (76); the middle sections of the second cross bars (76) are rotatably connected to a second gear (77); a tension adjustment unit (78) is provided between the support frames (4) and located on the upper surface of the frame (1); and a transmission counterweight mechanism (79) is provided at the rear side of the upper surface of the frame (1).

4. A tamping and compacting device for road and bridge subgrade construction according to claim 3, characterized in that: The tension adjustment unit (78) comprises a lifting seat (781) arranged between the support frames (4), and the lifting seat (781) is fixedly connected to the front middle position of the upper surface of the frame (1); a slider (782) is slidably connected to the inside of the frame (1); a first motor (783) is fixedly connected to the outer surface of one side of the slider (782); an output end of the first motor (783) passes through the slider (782) and is fixedly connected to a third gear (784); a chain (8) is clamped to the outside of the first gear (75), the second gear (77), and the third gear (784); an upper surface of the lifting seat (781) extends to the inside and is threadedly connected to an adjusting bolt (785); and the lower end of the adjusting bolt (785) is rotatably connected to the upper surface of the slider (782).

5. A tamping and compacting device for road and bridge subgrade construction according to claim 3, characterized in that: The transmission counterweight mechanism (79) comprises a fixing seat (791) fixedly connected to the rear side of the upper surface of the frame (1); a second motor (792) is fixedly connected to the rear surface of the fixing seat (791); a fourth gear (793) is fixedly connected to the output end of the second motor (792); two fifth gears (794) are meshedly connected to the outside of the fourth gear (793); the fifth gear (794) is fixedly connected to the rear end of the first screw rod (71); a second screw rod (795) is fixedly connected to the front surface of the fourth gear (793); a second nut seat (796) is threadedly connected to the outer cylindrical surface of the second screw rod (795); a counterweight block (797) is fixedly connected to the outside of the second nut seat (796); a slide rail (798) is fixedly connected to the rear side of the inner surface of the frame (1); and the counterweight block (797) is arranged inside the slide rail (798).

6. A tamping and compacting device for road and bridge subgrade construction according to claim 5, characterized in that: Two pulleys (799) are rotatably connected to both sides of the lower surface of the counterweight block (797), and the pulleys (799) are rollingly connected to the inside of the slide groove of the slide rail (798).

7. A tamping and compacting device for road and bridge subgrade construction according to claim 1, characterized in that: The front side of the lower surface of the vehicle frame (1) is rotatably connected to two rotating frames (12), and the rotating frames (12) are designed to be one high and one low. The rear upper surface of the rotating frame (12) extends to the lower surface and is penetrated by sliding holes (13). The lower surface of the vehicle frame (1) is located at the rear side of the rotating frame (12) and is fixedly connected to an electric telescopic rod (14). The lower surface of the front end of the electric telescopic rod (14) is fixedly connected to a buckle rod (15), and the buckle rod (15) is inserted into the inside of the two sliding holes (13). The inner side of the front end of the rotating frame (12) is provided with a floor plate (16). A height adjustment unit (17) is provided between the rotating frame (12) and the floor plate (16). The upper surface of the floor plate (16) extends to the upper surface of the vehicle frame (1) and is provided with a dustproof unit (18).

8. A tamping and compacting device for road and bridge subgrade construction according to claim 7, characterized in that: The height adjustment unit (17) comprises a screw rod (171) threadedly connected to the front end of the rotating frame (12); the lower end of the screw rod (171) is rotatably connected to a fixing block (172); the upper surface of the fixing block (172) is fixedly connected to two limiting rods (173), and the limiting rods (173) penetrate the upper and lower surfaces of the rotating frame (12).

9. A tamping and compacting device for road and bridge subgrade construction according to claim 7, characterized in that: The dustproof unit (18) comprises a water tank (181) fixedly connected to one side of the upper surface of the vehicle frame (1); a water pump (182) is installed on the upper surface of the water tank (181); a mounting plate (183) is provided on the upper surface of the floor plate (16); an atomizing pipe (184) is fixedly connected to the outer surface of one side of the mounting plate (183); and the atomizing pipe (184) and the water pump (182) are connected via a hose.

10. A tamping and compacting device for road and bridge subgrade construction according to claim 7, characterized in that: Two screw holes (19) are provided on the upper surface of the floor plate (16), and the mounting plate (183) is fixedly connected to the upper surface of the floor plate (16) by means of screws.

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