Compaction construction mechanical device for three-back backfilling

Abstract

The utility model relates to a tamping construction mechanical device for three-back backfill, and relates to the technical field of mechanical construction.The tamping construction mechanical device comprises a drill rod, a pressing plate and a supporting assembly, the drill rod is connected with an oil cylinder rod, the two ends of the drill rod are processed to form flat faces, the pressing plate is connected to one end of the drill rod, the pressing plate is perpendicular to the drill rod, and the supporting assembly is connected with the drill rod. The supporting assembly is located on the side, close to the drill rod, of the pressing plate, one side of the supporting assembly is connected with the drill rod, the other side of the supporting assembly is connected with the pressing plate, and the drill rod, the pressing plate and the supporting assembly form a tamping construction machine. The method has the effects that the construction speed is low, and the construction quality is difficult to guarantee, and backfilling and tamping construction can be efficiently carried out in a limited space.

Description

Technical Field

[0001] This application relates to the field of mechanical construction technology, and particularly relates to a compaction construction mechanical device for three-back backfilling. Background Art

[0002] During road and bridge construction, the road surface or bridge deck needs to be compacted. In the construction of highways and municipal engineering, three-back backfilling is a key and concealed project. Three-back backfilling refers to the backfilling operation behind structures such as bridges, culverts, and retaining walls. However, due to the narrow working surface, traditional rollers cannot perform compaction operations.

[0003] Currently, common three-back backfilling compaction equipment such as frog rammers and vertical impact rammers, etc. When the road surface needs to be compacted, the operator places the vertical impact rammer on the road surface to be compacted, and manual assistance is required during construction to compact the road surface.

[0004] In view of the above related technologies, the road surface can be compacted by manually holding the vertical impact rammer. However, during the working process, manual assistance is required, which not only has poor safety but also slow construction speed, and it is difficult to guarantee the construction quality. Therefore, there is an urgent need for a device that can efficiently perform backfilling compaction construction in a limited space to solve the existing problems. Utility Model Content

[0005] In order to solve the above technical problems, this application provides a compaction construction mechanical device for three-back backfilling.

[0006] The compaction construction mechanical device for three-back backfilling provided by this application adopts the following technical solutions:

[0007] A compaction construction mechanical device for three-back backfilling includes a drill rod, a pressing plate, and a support assembly. The drill rod is connected to the oil cylinder rod. Both ends of the drill rod are processed to form flat surfaces. The pressing plate is connected to one end of the drill rod, and the pressing plate is perpendicular to the drill rod. The support assembly is located on the side of the pressing plate close to the drill rod. One side of the support assembly is connected to the drill rod, and the other side is connected to the pressing plate. The drill rod, the pressing plate, and the support assembly form a compaction construction machine.

[0008] By adopting the above technical solution, the drill rod, the pressing plate and the support assembly are prefabricated and connected in the factory in advance. When a compaction construction mechanical device for three-back filling is needed, the drill rod is moved to the construction site, the drill rod is connected to the oil cylinder rod, the drill rod is moved close to the area to be compacted, and the oil cylinder rod is started. The compaction construction mechanical device can carry out compaction construction on the compacted area. Compared with the related technology, the present application forms a compaction construction mechanical device through the drill rod, the pressing plate and the support assembly, which can carry out compaction construction after backfilling in an area with limited construction space, accelerate the construction progress, improve the construction quality, and at the same time avoid the safety problems caused by manually operating a frog rammer or a vertical impact rammer for compaction, which is beneficial to improving the problems of slow construction speed and difficult-to-guarantee construction quality, and can efficiently carry out backfilling compaction construction in a limited space.

[0009] Optionally, the support assembly includes a plurality of support members, the plurality of support members are evenly distributed along the circumferential direction of the drill rod, the support member includes a support steel plate, the support steel plate is in a right-angled triangle shape, and the two right-angled sides of the support steel plate are respectively close to the drill rod and the pressing plate, and the support steel plate is connected to the drill rod and the pressing plate.

[0010] By adopting the above technical solution, by arranging the support steel plate to be connected to the pressing plate and the drill rod, the connection stability between the drill rod and the pressing plate can be increased, thereby facilitating compaction construction.

[0011] Optionally, the pressing plate and the drill rod are fixed by welding, and the pressing plate and the support steel plate are fixed by welding.

[0012] By adopting the above technical solution, by fixing the pressing plate and the drill rod by welding and fixing the pressing plate and the support steel plate by welding, it is further beneficial to increase the connection stability among the drill rod, the pressing plate and the support steel plate.

[0013] Optionally, it further includes a connection assembly, the connection assembly is located at one end of the drill rod away from the pressing plate, the connection assembly includes a hinge member and a fastener, the hinge member includes a first hinge seat and a second hinge seat, the first hinge seat is connected to the oil cylinder rod, the second hinge seat is connected to one end of the drill rod away from the pressing plate, and the first hinge seat is hinged to the second hinge seat;

[0014] The fastener is located at the connection part of the first hinge seat and the second hinge seat, the fastener is respectively connected to the first hinge seat and the second hinge seat, and the fastener is used to fix the first hinge seat and the second hinge seat.

[0015] By adopting the above technical solution, when a ramming construction machinery device for three-back filling is needed, the drill rod is moved to the construction site. According to the construction conditions, the operator rotates the drill rod, and the second hinge seat moves synchronously with the drill rod, causing the drill rod and the cylinder rod to rotate relative to each other until a certain angle is formed between the drill rod and the cylinder rod to meet the construction conditions. Subsequently, the fastener is taken out, and the first hinge seat and the second hinge seat are fixed through the fastener, and then the ramming operation can be carried out. By setting the hinge, it is convenient to allow relative rotation between the cylinder rod and the drill rod to adapt to different construction angles and terrain conditions; by setting the fastener, it is convenient to fix the first hinge seat and the second hinge seat, which is beneficial to increasing the connection stability between the cylinder rod and the drill rod and facilitating the ramming operation.

[0016] Optionally, the fastener includes a pin shaft. The pin shaft sequentially passes through the second hinge seat and the first hinge seat, and the pin shaft fixes the first hinge seat and the second hinge seat. Threads are provided on the outer wall of the pin shaft, and a first thread groove and a second thread groove are respectively provided on the first hinge seat and the second hinge seat to cooperate with the pin shaft.

[0017] By adopting the above technical solution, when it is necessary to connect the first hinge seat and the second hinge seat, the drill rod is rotated to a suitable position, and the operator takes out the pin shaft and sequentially passes the pin shaft through the second hinge seat and the first hinge seat, and then screws the pin shaft. Through the operator's observation, until the pin shaft is screwed to a suitable position, the pin shaft can fix the first hinge seat and the second hinge seat. By setting the pin shaft, it is convenient to fix the first hinge seat and the second hinge seat and convenient for the operator to operate.

[0018] Optionally, the connection assembly further includes a connecting member. The connecting member includes a first threaded sleeve and a second threaded sleeve. The first threaded sleeve is threadedly sleeved on the cylinder rod, and the second threaded sleeve is threadedly sleeved on the end of the drill rod away from the pressing plate. The first hinge seat is connected to the first threaded sleeve, and the second hinge seat is connected to the second threaded sleeve.

[0019] By adopting the above technical solution, when it is necessary to connect the connection assembly to the cylinder rod and the drill rod, the first threaded sleeve and the first hinge seat are connected in advance. Subsequently, the first threaded sleeve is threadedly sleeved on one end of the cylinder rod, and the second threaded sleeve is threadedly sleeved on one end of the drill rod, and then the cylinder rod and the drill rod can be connected. By setting the first threaded sleeve and the second threaded sleeve, it is convenient to connect the cylinder rod and the drill rod.

[0020] Optionally, the connecting component further includes a screwing member, which includes a fixing plate, a rotating plate and a screwing screw. The fixing plate is fixed to the side of the first threaded sleeve close to the drill rod. The area of the fixing plate is equal to the area of the side of the first threaded sleeve close to the drill rod. The rotating plate is rotatably connected to the side of the fixing plate away from the first threaded sleeve. The rotating plate fits with the fixing plate. The screwing screw sequentially passes through the rotating plate and the fixing plate, and the screwing screw is used to fix the rotating plate and the fixing plate. The first hinge seat is fixed to the rotating plate.

[0021] By adopting the above technical solution, when a ramming construction machinery device for three-backfilling is needed, according to the construction working conditions, first, rotate the first hinge seat and the second hinge seat to appropriate positions and fix the first hinge seat and the second hinge seat. Then, rotate the rotating plate, which can drive the drill rod to rotate, so that the drill rod and the oil cylinder rod meet the construction requirements. Then, fix the fixing plate and the rotating plate through the screwing screw, and then carry out the ramming operation. By setting the fixing plate and the rotating plate, the drill rod can be rotated to an appropriate position to adapt to different construction angles and terrain conditions.

[0022] Optionally, a threaded rod is fixed in the middle of one side of the pressing plate, and a threaded hole matching the threaded rod is provided in the middle of one end of the drill rod.

[0023] By adopting the above technical solution, when the pressing plate and the threaded rod need to be connected, move the pressing plate to the side of the drill rod where the threaded hole is provided. Just insert the threaded rod into the threaded hole and rotate the pressing plate to connect the pressing plate and the drill rod. When the pressing plate and the drill rod need to be separated, the operator rotates the pressing plate until the pressing plate and the drill rod are separated. By setting the cooperation of the threaded rod and the threaded hole, on the one hand, it is convenient to connect the pressing plate and the drill rod; on the other hand, it is convenient to replace the pressing plate.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. Compared with the related art, the present application forms a ramming construction machinery through the drill rod, the pressing plate and the supporting component, which can carry out the ramming construction after backfilling in an area with limited construction space, accelerate the construction progress, improve the construction quality, and avoid the safety problems caused by manual operation of the frog rammer and the vertical impact rammer, which is beneficial to improving the problems of slow construction speed and difficult to guarantee construction quality, and can efficiently carry out backfilling ramming construction in a limited space;

[0026] 2. By setting the supporting steel plate to be connected with the pressing plate and the drill rod, the connection stability between the drill rod and the pressing plate can be increased, thus facilitating the ramming construction;

[0027] 3. By providing a hinge, it is convenient to allow relative rotation between the cylinder rod and the drill rod to adapt to different construction angles and terrain conditions; by providing a fastener, it is convenient to fix the first hinge seat and the second hinge seat, which is beneficial to increasing the connection stability between the cylinder rod and the drill rod and facilitating the ramming operation. Description of the Drawings

[0028] Figure 1 is the overall structural schematic diagram in Embodiment 1;

[0029] Figure 2 is the structural schematic diagram of the connection component from the first perspective in Embodiment 1;

[0030] Figure 3 is the structural schematic diagram of the connection component from the second perspective in Embodiment 1;

[0031] Figure 4 is the overall structural schematic diagram in Embodiment 2;

[0032] Figure 5 is the structural schematic diagram of the drill rod and the pressing plate from the first perspective in Embodiment 2;

[0033] Figure 6 is the structural schematic diagram of the drill rod and the pressing plate from the second perspective in Embodiment 2.

[0034] Description of the Reference Numerals: 1, drill rod; 11, threaded hole; 2, pressing plate; 21, threaded rod; 22, connection hole; 3, support assembly; 31, support member; 311, support steel plate; 312, connecting plate; 313, connecting screw; 4, connection assembly; 41, connecting member; 411, first threaded sleeve; 412, second threaded sleeve; 42, screwing member; 421, fixing plate; 4211, fixing hole; 422, rotating plate; 4221, positioning hole; 423, screwing screw; 43, hinge; 431, first hinge seat; 432, second hinge seat; 44, fastener; 441, pin shaft; 442, nut. Detailed Description of the Embodiment

[0035] The following further elaborates on this application Figure 1-6 in conjunction with the attached drawings.

[0036] The embodiment of this application discloses a ramming construction mechanical device for three-back backfilling.

[0037] Embodiment 1

[0038] Referring to Figure 1 , a ramming construction mechanical device for three-back backfilling includes a drill rod 1, a pressing plate 2, a support assembly 3, and a connection assembly 4. The pressing plate 2 and the support assembly 3 are both arranged on the drill rod 1. The support assembly 3 is connected to the pressing plate 2. The connection assembly 4 is arranged on the drill rod 1, and the connection assembly 4 is used for connecting the drill rod 1 and the cylinder rod.

[0039] Referring to Figure 1 , in this embodiment, the drill rod 1 is a cylindrical rod, which is modified from the initial drill rod 1 by cutting and grinding. The length of the drill rod 1 is determined according to the needs of the personnel. Both ends of the drill rod 1 are flat surfaces. The pressing plate 2 is located at one end of the drill rod 1, and the pressing plate 2 is perpendicular to the drill rod 1. The pressing plate 2 can be a rectangular plate or a circular plate. In this embodiment, the pressing plate 2 is a circular plate, and the pressing plate 2 is welded to the drill rod 1, which can improve the connection stability between the pressing plate 2 and the drill rod 1.

[0040] Referring to Figure 1 , the support assembly 3 is located on the side of the pressing plate 2 close to the drill rod 1. The support assembly 3 includes a plurality of support members 31. The number of support members 31 can be one, or two or more. In this embodiment, the number of support members 31 is four, and the four support members 31 are evenly distributed along the circumferential direction of the drill rod 1. The support member 31 includes a support steel plate 311. The support steel plate 311 is a right triangle, and the two right sides of the support steel plate 311 are respectively close to the drill rod 1 and the pressing plate 2. The support steel plate 311 is welded to the drill rod 1 and the pressing plate 2, which can increase the connection stability between the drill rod 1 and the pressing plate 2, so as to facilitate ramming construction. The drill rod 1, the pressing plate 2 and the support steel plate 311 form a ramming construction machine, which can carry out ramming construction after backfilling in an area with limited construction space.

[0041] Referring to Figure 1 and Figure 2 , the connection assembly 4 is located at the end of the drill rod 1 away from the pressing plate 2. The connection assembly 4 includes a connecting member 41, a screwing member 42, a hinged member 43 and a fastening member 44. The connecting member 41 includes a first threaded sleeve 411 and a second threaded sleeve 412. Among them, the first threaded sleeve 411 is close to the oil cylinder rod, and the second threaded sleeve 412 is close to the drill rod 1. The first threaded sleeve 411 is threadedly sleeved on the oil cylinder rod, and a thread matching the first threaded sleeve 411 is provided on the outer wall of the end of the oil cylinder rod close to the drill rod 1. The second threaded sleeve 412 is threadedly sleeved on the end of the drill rod 1 away from the pressing plate 2, and a thread matching the second threaded sleeve 412 is provided on the outer wall of the end of the drill rod 1 away from the pressing plate 2, so as to facilitate the connection between the first threaded sleeve 411 and the oil cylinder rod and the connection between the second threaded sleeve 412 and the drill rod 1.

[0042] Referring to Figure 1 , Figure 2 and Figure 3, the screwing member 42 approaches the first threaded sleeve 411. The screwing member 42 includes a fixing plate 421, a rotating plate 422, and a screwing screw 423. The fixing plate 421 is located on the side of the first threaded sleeve 411 close to the drill rod 1. The fixing plate 421 is fixedly connected to the first threaded sleeve 411 by screws. The area of the fixing plate 421 is equal to the area of the side of the first threaded sleeve 411 close to the drill rod 1, reducing the occupation of the fixing plate 421 and facilitating operations in a limited working space. The rotating plate 422 is located on the side of the fixing plate 421 away from the first threaded sleeve 411. The rotating plate 422 is rotatably connected to the fixing plate 421, and the rotating plate 422 fits with the fixing plate 421. A plurality of fixing holes 4211 are formed in the fixing plate 421, and the plurality of fixing holes 4211 are evenly distributed along the circumferential direction of the fixing plate 421. A positioning hole 4221 is formed in the rotating plate 422. When the rotating plate 422 rotates to a suitable position, the positioning hole 4221 corresponds to the fixing hole 4211. The screwing screw 423 sequentially passes through the positioning hole 4221 and the fixing hole 4211, and the screwing screw 423 is sequentially threadedly connected to the rotating plate 422 and the fixing plate 421. The screwing screw 423 can fix the rotating plate 422 and the fixing plate 421.

[0043] Refer to Figure 2 and Figure 3 , the hinge member 43 is located between the first threaded sleeve 411 and the rotating plate 422. The hinge member 43 includes a first hinge seat 431 and a second hinge seat 432. The first hinge seat 431 corresponds to the rotating plate 422, and the second hinge seat 432 corresponds to the second threaded sleeve 412. The first hinge seat 431 is fixedly connected to the rotating plate 422 by screws, and the first hinge seat 431 rotates with the rotating plate 422. The second hinge seat 432 is fixedly connected to the second threaded sleeve 412 by screws. The first hinge seat 431 and the second hinge seat 432 are hinged, facilitating relative rotation between the oil cylinder rod and the drill rod 1 to adapt to different construction angles and terrain conditions.

[0044] Refer to Figure 2 and Figure 3 , the fastening member 44 is located at the connection between the first hinge seat 431 and the second hinge seat 432. The fastening member 44 includes a pin shaft 441 and a nut 442. The pin shaft 441 sequentially passes through the second hinge seat 432 and the first hinge seat 431. The pin shaft 441 can fix the first hinge seat 431 and the second hinge seat 432. A thread is provided on the outer wall of the pin shaft 441. A first thread groove and a second thread groove are respectively formed on the first hinge seat 431 and the second hinge seat 432 and are matched with the pin shaft 441. After the pin shaft 441 passes through the second hinge seat 432, it is matched with the nut 442, facilitating increasing the stability of the second hinge seat 432 and the first hinge seat 431.

[0045] The implementation principle of Embodiment 1 is as follows: The drill rod 1, the pressing plate 2 and the support assembly 3 are prefabricated and connected in the factory in advance. When a ramming construction mechanical device for three-back backfill is needed, the drill rod 1 is moved to the construction site, the connecting assembly 4 is taken out, the first threaded sleeve 411 is connected to the oil cylinder rod, and then the drill rod 1 is connected to the second threaded sleeve 412. According to the construction conditions, the operator rotates the drill rod 1 to make the drill rod 1 and the oil cylinder rod rotate relative to each other, and an angle is formed between the drill rod 1 and the oil cylinder rod. Subsequently, the pin shaft 441 is sequentially passed through the second hinge seat 432 and the first hinge seat 431 to fix the first hinge seat 431 and the second hinge seat 432. Then, by rotating the rotating plate 422, the drill rod 1 can be driven to rotate so that the drill rod 1 and the oil cylinder rod meet the construction requirements. Then, the rotating plate 422 and the fixing plate 421 are fixed by screwing the screw 423. After that, the ramming construction mechanical device for three-back backfill is used to compact the construction site.

[0046] Embodiment 2

[0047] Referring to Figure 4 and Figure 5 This embodiment is different from Embodiment 1 in that a threaded hole 11 is provided in the middle of one end of the drill rod 1, a threaded rod 21 is provided on one side of the pressing plate 2, the threaded rod 21 is perpendicular to the pressing plate 2 and is located in the middle of the pressing plate 2. The threaded rod 21 is welded to the pressing plate 2, and the threaded rod 21 is in threaded fit with the threaded hole 11. When the pressing plate 2 and the drill rod 1 need to be connected, only the threaded rod 21 needs to be inserted into the threaded hole 11 and the pressing plate 2 is screwed to connect the pressing plate 2 and the drill rod 1.

[0048] Referring to Figure 4 、 Figure 5 and Figure 6 The support 31 further includes a connecting plate 312 and a connecting screw 313. A plurality of connecting holes 22 are provided on the pressing plate 2, and the plurality of connecting holes 22 are evenly distributed along the circumference of the pressing plate 2. The connecting plate 312 is welded to the support steel plate 311, and the connecting plate 312 is located at one end of the support steel plate 311 close to the drill rod 1. The connecting plate 312 is perpendicular to the drill rod 1. When the pressing plate 2 is connected to the drill rod 1, the connecting screw 313 passes through the connecting plate 312 and then extends into the connecting hole 22. The connecting screw 313 is sequentially threadedly connected to the connecting plate 312 and the pressing plate 2, and the connecting screw 313 fixes the connecting plate 312 and the pressing plate 2, thereby fixing the support steel plate 311 and the pressing plate 2.

[0049] The implementation principle of Embodiment 2 is as follows: The pressing plate 2 and the drill rod 1 are prefabricated in the factory in advance. When the pressing plate 2 and the drill rod 1 need to be connected, the pressing plate 2 is moved to the side of the drill rod 1 where the threaded hole 11 is provided. Only the threaded rod 21 needs to be inserted into the threaded hole 11 and the pressing plate 2 is screwed to connect the pressing plate 2 and the drill rod 1. Then, the connecting plate 312 and the pressing plate 2 are fixed by the connecting screw 313.

[0050] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A tamping construction machinery device for three-back backfilling, characterized in that: The invention comprises a drill rod (1), a pressure plate (2) and a support assembly (3); the drill rod (1) is connected to a cylinder rod; both ends of the drill rod (1) are processed to form a flat surface; the pressure plate (2) is connected to one end of the drill rod (1); the pressure plate (2) and the drill rod (1) are arranged vertically; the support assembly (3) is located on the side of the pressure plate (2) close to the drill rod (1); one side of the support assembly (3) is connected to the drill rod (1) and the other side is connected to the pressure plate (2); the drill rod (1), the pressure plate (2) and the support assembly (3) form a tamping construction machine.

2. A tamping construction mechanical device for three-back backfilling according to claim 1, characterized in that: The support assembly (3) comprises a plurality of support members (31), wherein the plurality of support members (31) are evenly distributed along the circumference of the drill rod (1), and the support member (31) comprises a support steel plate (311), wherein the support steel plate (311) is in the shape of a right-angled triangle, wherein two right-angled sides of the support steel plate (311) are respectively close to the drill rod (1) and the pressure plate (2), and the support steel plate (311) is connected to the drill rod (1) and the pressure plate (2).

3. A tamping construction mechanical device for three-back backfilling according to claim 2, characterized in that: The pressing plate (2) and the drill rod (1) are fixed by welding, and the pressing plate (2) and the supporting steel plate (311) are fixed by welding.

4. A tamping construction mechanical device for three-back backfilling according to claim 2, characterized in that: It also includes a connecting assembly (4), the connecting assembly (4) is located at the end of the drill rod (1) away from the pressure plate (2), the connecting assembly (4) includes a hinge (43) and a fastener (44), the hinge (43) includes a first hinge seat (431) and a second hinge seat (432), the first hinge seat (431) is connected to the cylinder rod, the second hinge seat (432) is connected to the end of the drill rod (1) away from the pressure plate (2), and the first hinge seat (431) is hinged to the second hinge seat (432); The fastener (44) is located at the connection between the first hinge seat (431) and the second hinge seat (432), and the fastener (44) is respectively connected to the first hinge seat (431) and the second hinge seat (432). The fastener (44) is used to fix the first hinge seat (431) and the second hinge seat (432).

5. A tamping construction mechanical device for three-back backfilling according to claim 4, characterized in that: The fastener (44) includes a pin shaft (441), and the pin shaft (441) passes through the second hinge seat (432) and the first hinge seat (431) in sequence. The pin shaft (441) fixes the first hinge seat (431) and the second hinge seat (432). The outer wall of the pin shaft (441) is provided with a thread, and the first hinge seat (431) and the second hinge seat (432) are respectively provided with a first thread groove and a second thread groove that cooperate with the pin shaft (441).

6. A tamping construction mechanical device for three-back backfilling according to claim 4, characterized in that: The connecting assembly (4) also includes a connecting piece (41), and the connecting piece (41) includes a first threaded sleeve (411) and a second threaded sleeve (412), wherein the first threaded sleeve (411) is threadedly sleeved on the cylinder rod, and the second threaded sleeve (412) is threadedly sleeved on the end of the drill rod (1) away from the pressure plate (2), the first articulated seat (431) is connected to the first threaded sleeve (411), and the second articulated seat (432) is connected to the second threaded sleeve (412).

7. A tamping construction mechanical device for three-back backfilling according to claim 6, characterized in that: The connecting assembly (4) further comprises a screwing member (42), the screwing member (42) comprising a fixed plate (421), a rotating plate (422) and a screwing screw (423), the fixed plate (421) being fixed to a side of the first threaded sleeve (411) close to the drill rod (1), the area of ​​the fixed plate (421) being equal to the side area of ​​the first threaded sleeve (411) close to the drill rod (1), the rotating plate (422) being rotatably connected to a side of the fixed plate (421) away from the first threaded sleeve (411), the rotating plate (422) being fitted with the fixed plate (421), the screwing screw (423) passing through the rotating plate (422) and the fixed plate (421) in sequence, the screwing screw (423) being used to fix the rotating plate (422) and the fixed plate (421), and the first hinge seat (431) being fixed to the rotating plate (422).

8. The tamping construction mechanical device for three-back backfilling according to claim 2, characterized in that: A threaded rod (21) is fixed in the middle of one side of the pressing plate (2), and a threaded hole (11) matching with the threaded rod (21) is opened in the middle of one end of the drill rod (1).

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