A mobile foundation compaction device used in the airport foundation excavation stage

Abstract

The present invention relates to the field of construction compaction equipment, and specifically to a mobile foundation compaction device used in the foundation excavation stage of an airport, comprising a trailer and a first hammer head mounted on the trailer and capable of moving in a vertical direction; a vertically arranged hammer rod is mounted on the first hammer head; a second hammer head is movably sleeved on the hammer rod, and in a natural state, the second hammer head presses against the upper part of the first hammer head; a first contact portion and a second contact portion are separately provided on the first hammer head and the second hammer head, respectively; a lifting portion and a motion control device for controlling the movement of the lifting portion are also movably provided on the trailer; the lifting portion cooperates with the first contact portion and the second contact portion to control the first hammer head and the second hammer head to perform intermittent hammering. The present invention utilizes the movement of the trailer to perform a mobile double hammering operation, thereby improving the compaction effect and shortening the construction period.

Description

Technical Field

[0001] The present invention relates to the field of construction compaction equipment, in particular to a mobile foundation compaction device used in the foundation excavation stage of an airport. Background Art

[0002] During the excavation phase of airport foundation construction, the ground is compacted. Due to the large area of ​​the airport foundation, conventional manual compaction equipment is not suitable, requiring the use of large vehicles and machinery. This is typically accomplished by lifting a heavy hammer and dropping it for dynamic compaction, or by using hydraulic compaction equipment that first places a hammer head against the ground and then intermittently strikes the hammer head with a hydraulically driven impactor. Both require cranes, resulting in high costs. Furthermore, compaction is performed at fixed points, with the equipment moving from one location to the next, making it inefficient.

[0003] For example, Chinese patent application CN114293530A discloses a compacting device for construction that is easy to move, comprising: a housing with a handle provided on the upper left side of the housing; a battery provided on the top of the housing; a compacting assembly provided inside the housing that can compact the ground; a compacting plate with a compacting plate slidingly provided on the compacting assembly; and a moving assembly provided at the bottom of the housing that can move the housing. By continuously extending and shortening the extended end of the electric push rod, the compacting plate can be continuously moved up and down to compact the foundation or backfill soil and stone materials, thereby compacting the foundation or backfill soil and stone materials. This structure realizes mobile compaction operations, but it still uses a more traditional compaction method, and the compaction effect still has a lot of room for improvement. Summary of the Invention

[0004] To address the above problems, a mobile foundation compaction device is provided for use in the excavation stage of airport foundations. The double hammering effect of the first hammer head and the second hammer head is achieved through the cooperation of the lifting part with the first contact part and the second contact part, thereby improving the compaction efficiency.

[0005] In order to solve the problems of the prior art, the present invention provides a first embodiment of a mobile foundation compaction device for the excavation stage of an airport foundation: it includes a trailer and a first hammer head installed on the trailer and capable of moving in a vertical direction; the first hammer head is equipped with a vertically arranged hammer rod; a second hammer head is movably sleeved on the hammer rod, and in a natural state, the second hammer head presses against the upper part of the first hammer head; the first hammer head and the second hammer head are respectively provided with a first contact part and a second contact part; the trailer is also movably provided with a lifting part and a motion control device for controlling the movement of the lifting part; the motion trajectory of the lifting part includes a first motion and a second motion which are connected and cyclically repeated with each other; in the first motion, the lifting part moves to the bottom of the first contact part and moves upward to abut the first contact part, and then drives the first hammer head and the second hammer head to rise; in the second motion, the lifting part moves in the horizontal direction and is separated from the vertically downward projections of the first contact part and the second contact part in turn at intervals in time so that the first hammer head and the second hammer head fall down in batches at intervals.

[0006] Preferably, the first contact portion is a first cross bar fixed on one side of the first hammer head, and the second contact portion is a second cross bar fixed on one side of the second hammer head, and the extension directions of the first cross bar and the second cross bar are consistent; in a natural state, the second cross bar abuts against the top of the first cross bar, and the end of the second cross bar extends outward from the end of the first cross bar, and the lifting portion in the second movement process moves along the extension direction of the first cross bar and the second cross bar and moves out of the end of the second cross bar at the end of the stroke.

[0007] Preferably, the end of the first cross bar has a slope that allows the lifting portion to move smoothly to the bottom of the second cross bar.

[0008] Preferably, the motion control device includes a chain transmission mechanism composed of a chain, a sprocket and a tensioning wheel installed on the trailer, and a power component that provides power to the chain transmission mechanism; the lifting part is installed on the chain.

[0009] Preferably, the power assembly is a rotary drive mounted on the trailer.

[0010] Preferably, the trailer is also provided with a guide assembly that cooperates with the chain transmission mechanism to improve the stability of the movement of the lifting part; the lifting part is located between the chain transmission mechanism and the guide assembly; the guide assembly includes a slider, a first slide groove and a second slide groove; one end of the lifting part is installed on the slider; the first slide groove is installed on the trailer; the second slide groove slides with the first slide groove in the vertical direction; the slider slides with the second slide groove in the horizontal direction.

[0011] Preferably, the lifting portion includes a mounting shaft and a roller rotatably disposed on the mounting shaft; the mounting shaft is connected to the motion control device.

[0012] Preferably, a guide assembly is installed on the trailer to provide guidance for the vertical movement of the hammer rod; the guide assembly includes a guide sleeve and a support frame; the guide sleeve is clearance-fitted with the hammer rod; and the two ends of the support frame are fixedly connected to the trailer and the guide sleeve respectively.

[0013] The present invention also provides a second embodiment of a mobile foundation compaction device for use in the airport foundation excavation phase, which differs from the first embodiment in that the power assembly is different:

[0014] Preferably, the trailer has a rotating shaft connecting the wheels on both sides; the power assembly includes a transmission shaft that provides power to the chain transmission mechanism, and a synchronous transmission assembly composed of a first synchronous wheel, a second synchronous wheel and a synchronous belt, the first synchronous wheel is connected to the rotating shaft, and the second synchronous wheel is connected to the transmission shaft; the power assembly also includes a speed increase assembly that increases the speed of the transmission shaft and outputs it to the chain transmission mechanism.

[0015] Preferably, the speed increasing assembly includes a first gear and a second gear, the diameter of the first gear is larger than the diameter of the second gear, and the first gear and the second gear are meshed; the first gear is transmission connected to the transmission shaft, and the second gear is transmission connected to the chain transmission mechanism.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention drives the lifting part to cycle through the first and second movements through a motion control device, and utilizes the cooperation between the lifting part and the first and second contact parts to realize the first hammer head and the second hammer head to hit the ground in an intermittent manner, thereby improving the compaction efficiency. Specifically, the motion control device drives the lifting part to cycle through the first and second movements. The first movement is to lift the first hammer head and the second hammer head, which are in a low position, that is, the position of hammering the ground, upward to a high position; during the second movement, when the lifting part moves out of the downward projection of the first contact part, it avoids preventing the first contact part from falling with the first hammer head. The first hammer head hammers and compacts the ground for the first time. At this time, the lifting part has not yet separated from the vertical downward projection of the second contact part, thus preventing the second contact part and the second hammer head from falling together with the first hammer head; when the lifting part continues to complete the second movement, it leaves the vertical downward projection of the second contact part, thereby releasing the obstruction to the second contact part and the second hammer head from falling. The second hammer head slides along the hammer rod and hits the first hammer head to complete the second heavy hammering.

[0018] 2. By providing a sloped surface at the end of the first crossbar, the present invention further reduces the impact of the second crossbar on the lifting portion, thereby improving the stability of the structure. Specifically, this prevents the lifting portion from being subjected to a significant impact force when the second crossbar and the second hammer head momentarily drop by the same height as the first crossbar when the lifting portion transitions to the second crossbar.

[0019] 3. The second embodiment of the power assembly of the present invention utilizes the force generated by the trailer's movement to drive the lifting unit, achieving energy savings and environmental protection. Specifically, the rotating shaft drives the first synchronous wheel to rotate, and the synchronous belt transmits the torque of the first synchronous wheel to the second synchronous wheel, which in turn drives the drive shaft to rotate, thereby outputting power to the chain transmission mechanism, effectively recycling the force generated by the trailer's movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional diagram of the first embodiment of a mobile foundation compaction device used in the airport foundation excavation stage, with the first hammer head and the second hammer head raised Figure 1 .

[0021] Figure 2 yes Figure 1 A three-dimensional cross-sectional view of .

[0022] Figure 3 The present invention is a three-dimensional schematic diagram of a first embodiment of a mobile foundation compacting device used in the airport foundation excavation stage, with the first hammer head and the second hammer head in a falling state.

[0023] Figure 4 yes Figure 3 A three-dimensional cross-sectional view of .

[0024] Figure 5 The diagram shows a side view of a hammer assembly of a mobile foundation compaction device used during the excavation phase of an airport foundation.

[0025] Figure 6 The present invention is a schematic diagram of another implementation of a hammer assembly of a mobile foundation compaction device used in the airport foundation excavation stage.

[0026] Figure 7 This is a three-dimensional diagram of the first embodiment of a mobile foundation compaction device used in the airport foundation excavation stage, with the first hammer head and the second hammer head raised Figure 2 .

[0027] Figure 8 This is a three-dimensional diagram of the second embodiment of a mobile foundation compaction device used in the airport foundation excavation stage, with the first hammer head and the second hammer head raised Figure 1 .

[0028] Figure 9 The present invention is a schematic diagram of a motion control device of a second embodiment of a mobile foundation compaction device used in the foundation excavation stage of an airport.

[0029] Figure 10 yes Figure 9 3D schematic diagram of .

[0030] Figure 11The present invention is a three-dimensional schematic diagram of a guide assembly of a mobile foundation compaction device used in the foundation excavation stage of an airport.

[0031] Figure 12 It is a partial exploded perspective view of a guide assembly of a mobile foundation compaction device used in the excavation stage of an airport foundation.

[0032] Figure 13 yes Figure 4 A partial enlarged view of point A in the middle.

[0033] The numbers in the figure are:

[0034] 1-trailer; 11-rotating shaft; 12-guide assembly; 121-guide sleeve; 1211-ball; 122-support frame; 2-first hammer; 21-slot; 3-hammer rod; 4-second hammer; 5-first contact portion; 51-first crossbar; 511-slope; 6-second contact portion; 61-second crossbar; 7-lifting portion; 71-mounting shaft; 72-roller; 8-motion control device; 81-chain; 82-sprocket; 83-tensioning pulley; 84-power assembly; 841-rotating drive; 8411-mounting bracket; 842-drive shaft; 843-first synchronous wheel; 844-second synchronous wheel; 845-synchronous belt; 846-speed increasing assembly; 8461-first gear; 8462-second gear; 85-guide assembly; 851-slider; 852-first slide groove; 853-second slide groove. DETAILED DESCRIPTION

[0035] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] First embodiment:

[0037] Reference Figures 1-6: A mobile foundation compaction device for the excavation stage of an airport foundation, comprising a trailer 1 and a first hammer head 2 mounted on the trailer 1 and capable of moving in a vertical direction; a vertically arranged hammer rod 3 is mounted on the first hammer head 2; a second hammer head 4 is movably sleeved on the hammer rod 3, and in a natural state, the second hammer head 4 presses against the upper part of the first hammer head 2; a first contact portion 5 and a second contact portion 6 are respectively separately provided on the first hammer head 2 and the second hammer head 4; a lifting portion 7 and a motion control device 8 for controlling the movement of the lifting portion 7 are also movably provided on the trailer 1; the motion trajectory of the lifting portion 7 includes a first motion and a second motion which are connected and cyclically reciprocated with each other; in the first motion, the lifting portion 7 moves to the bottom of the first contact portion 5 and moves upward to abut the first contact portion 5, and then drives the first hammer head 2 and the second hammer head 4 to rise; in the second motion, the lifting portion 7 moves in the horizontal direction and is separated from the vertical downward projections of the first contact portion 5 and the second contact portion 6 in sequence at intervals in time so that the first hammer head 2 and the second hammer head 4 fall down in batches at intervals.

[0038] The first hammer head 2, the hammer rod 3, the second hammer head 4, the first contact portion 5 and the second contact portion 6 together constitute a hammer assembly. The trailer 1 can be an engineering vehicle with its own power source or a non-powered transportation structure mounted behind an engineering vehicle. When the trailer 1 moves, the motion control device 8 drives the lifting portion 7 to cycle through the first and second movements. The first movement serves to lift the first hammer 2 and the second hammer 4, which are in a low position (i.e., the position where they strike the ground), to a high position. During the second movement, when the lifting portion 7 moves out of the downward projection of the first contact portion 5, it prevents the first contact portion 5 from falling with the first hammer 2, and the first hammer 2 strikes the ground for the first time to compact the ground. At this time, the lifting portion 7 has not yet separated from the vertical downward projection of the second contact portion 6, thus preventing the second contact portion 6 and the second hammer 4 from falling with the first hammer 2. When the lifting portion 7 continues to complete the second movement, it leaves the vertical downward projection of the second contact portion 6, thus removing the obstruction to the second contact portion 6 and the second hammer 4 from falling. The second hammer 4 slides along the hammer rod 3 and strikes the first hammer 2 to complete the second heavy hammering. The figure only shows one set of interval hammering groups consisting of the second hammer 4 and the second contact portion 6. Multiple interval hammering groups can be arranged in sequence along the length of the hammer rod 3 to achieve multiple hammerings, thereby improving the compaction effect. The first and second movements only need to have corresponding sub-movements. For example, during the lifting movement, the lifting portion 7 can move in an inclined upward direction to still achieve the desired effect. This allows the trajectory of the cyclic motion formed by the first and second movements to be in the shape of a U-shaped triangle, a triangle, or a circle. The natural state is when the lifting portion 7 is not in contact with the first and second contact portions 5, 6, and the first and second hammer heads 2, 4 are only subject to gravity or ground forces.

[0039] Reference Figure 4-Figure 6: The first contact portion 5 is a first cross bar 51 fixed to one side of the first hammer head 2, and the second contact portion 6 is a second cross bar 61 fixed to one side of the second hammer head 4. The extension directions of the first cross bar 51 and the second cross bar 61 are consistent; in the natural state, the second cross bar 61 abuts against the top of the first cross bar 51, and the end of the second cross bar 61 extends outward from the end of the first cross bar 51. The lifting portion 7 in the second movement process moves along the extension directions of the first cross bar 51 and the second cross bar 61 and moves out of the end of the second cross bar 61 at the end of the stroke.

[0040] In the figure, one end of the first crossbar 51 and the second crossbar 61 has a vertical rod so as to raise the overall height of the first crossbar 51 and the second crossbar 61 above the first hammer 2 and the second hammer 4. Other spatial arrangements can also be made to directly fix the first crossbar 51 and the second crossbar 61 to the first hammer 2 and the second hammer 4. When the first hammer 2 and the second hammer 4 are in a low position, the second crossbar 61 abuts against the first crossbar 51. During the first movement, the lifting portion 7 first moves to the bottom of the second crossbar 61, then moves upward to abut the bottom of the first contact portion 5, and then lifts the first crossbar 51 and the second crossbar 61 upward together, thereby lifting the first hammer 2 and the second hammer 4 together. During the second movement, the lifting portion 7 first slides out from the end of the first crossbar 51 so that the first crossbar 51 can fall together with the first hammer 2. At this time, a section of the end of the second crossbar 61 is still above the lifting portion 7. Therefore, the lifting portion 7 now prevents the second crossbar 61 from falling, and the second hammer 4 is also prevented. When the lifting portion 7 continues to complete the second movement, the lifting portion 7 moves out of the end of the second crossbar 61 so that the second crossbar 61 and the second hammer 4 fall under the action of gravity and hammer the first hammer 2 to achieve double compaction. Figure 6 The figure shows another implementation of the hammer assembly. The size of the second hammer head 4 can be increased so that an inverted step structure is formed at the edge of the second hammer head 4 and the first hammer head 2. A groove 21 is dug out on the side wall of the first hammer head 2. The top surface of the groove 21 plays the role of the bottom of the first cross bar 51 in the first implementation. The part of the second hammer head 4 that exceeds the edge of the first hammer head 2 plays the role of the bottom of the second cross bar 61 in the first implementation.

[0041] Reference Figure 4 and Figure 5 The end of the first cross bar 51 has a slope 511 that allows the lifting portion 7 to move smoothly to the bottom of the second cross bar 61.

[0042] If the end face of the first cross bar 51 and the ground of the second cross bar 61 are perpendicular to each other, a certain drop will be formed, causing the lifting part 7 to jump when transitioning from the first cross bar 51 to the second cross bar 61, that is, the second cross bar 61 with the second hammer head 4 instantly drops to the height of the second cross bar 61, which places high requirements on the material and support of the lifting part 7. By providing a slope 511 at the end of the first cross bar 51, this jump can be reduced or even eliminated, thereby providing better protection for the lifting part 7 and reducing the cost of the equipment.

[0043] Reference Figure 2 : The motion control device 8 includes a chain transmission mechanism composed of a chain 81, a sprocket 82 and a tensioning pulley 83 installed on the trailer 1, and a power component 84 that provides power to the chain transmission mechanism; the lifting part 7 is installed on the chain 81.

[0044] The path traversed by chain 81 constitutes the path of the first and second motion cycles. In the figure, this path is a triangular structure with one vertical side, which improves the movement efficiency of lifting portion 7. The chain transmission mechanism is supported by a support plate on trailer 1, allowing chain 81 to be distributed in a vertical plane. Power is provided to the chain transmission mechanism by power assembly 84. The chain transmission mechanism is a commonly used transmission structure, and its specific installation structure will not be described in detail here.

[0045] Reference Figure 2 and Figure 7 : The power assembly 84 is a rotary driver 841 installed on the trailer 1.

[0046] The rotary driver 841 is preferably a high-torque servo motor or a servo motor equipped with a speed reducer to increase torque. Any other rotary driver 841 known to those skilled in the art that can output power to the chain transmission mechanism can also achieve the same effect. The servo motor is indirectly fixed to the trailer 1 by fixing it to a support plate via a motor bracket. The entire chain transmission mechanism can be driven by coaxially fixedly connecting the motor shaft of the servo motor to the rotating shaft of either the sprocket 82 or the tensioning pulley 83. As shown in the figure, the motor shaft of the servo motor is connected to the rotating shaft of the tensioning pulley 83 via a coupling. The rotating shaft is rotatably arranged on the support plate.

[0047] Reference Figure 7 and Figure 11 : The trailer 1 is also provided with a guide assembly 85 that cooperates with the chain transmission mechanism to improve the stability of the movement of the lifting part 7; the lifting part 7 is located between the chain transmission mechanism and the guide assembly 85; the guide assembly 85 includes a slider 851, a first slide groove 852 and a second slide groove 853; one end of the lifting part 7 is installed on the slider 851; the first slide groove 852 is installed on the trailer 1; the second slide groove 853 slides with the first slide groove 852 in the vertical direction; the slider 851 slides with the second slide groove 853 in the horizontal direction.

[0048] The first chute 852 and the second chute 853 provide vertical and horizontal guidance for the movement of the lifting portion 7, respectively, to improve the stability of the chain transmission mechanism. Another set of chain transmission mechanisms can also be provided to achieve the guiding effect.

[0049] Reference Figure 1 、 Figure 11 and Figure 12 : The lifting part 7 includes a mounting shaft 71 and a roller 72 rotatably arranged on the mounting shaft 71; the mounting shaft 71 is connected to the motion control device 8.

[0050] The rolling structure formed by the roller 72 and the mounting shaft 71 converts the relative movement between the lifting portion 7 and the first contact portion 5 and the second contact portion 6 into rolling friction, further improving the smoothness of the movement of the lifting portion 7 and effectively reducing wear, thereby extending the service life of the equipment.

[0051] Reference Figure 1 and Figure 13 : The trailer 1 is equipped with a guide assembly 12 for guiding the vertical movement of the hammer rod 3; the guide assembly 12 includes a guide sleeve 121 and a support frame 122; the guide sleeve 121 is clearance-fitted with the hammer rod 3; the two ends of the support frame 122 are fixedly connected to the trailer 1 and the guide sleeve 121 respectively.

[0052] Balls 1211 are detachably installed in an array inside the guide sleeve 121. One side of the ball 1211 extends out of the inner wall of the guide sleeve 121 and contacts the side wall of the hammer rod 3, further improving the smoothness of the movement of the hammer rod 3 and reducing wear.

[0053] Second embodiment (the difference from the first embodiment is that the power assembly 84 is different):

[0054] Reference Figure 8 and Figure 9 : The trailer 1 has a rotating shaft 11 connecting the wheels on both sides; the power assembly 84 includes a transmission shaft 842 that provides power to the chain transmission mechanism, and a synchronous transmission assembly composed of a first synchronous wheel 843, a second synchronous wheel 844 and a synchronous belt 845, the first synchronous wheel 843 is in transmission connection with the rotating shaft 11, and the second synchronous wheel 844 is in transmission connection with the transmission shaft 842; the power assembly 84 also includes a speed increase assembly 846 that increases the speed of the transmission shaft 842 and outputs it to the chain transmission mechanism.

[0055] During the movement of the trailer 1, the rotating shaft 11 drives the first synchronous wheel 843 to rotate. The synchronous belt 845 transmits the torque of the first synchronous wheel 843 to the second synchronous wheel 844, which in turn drives the transmission shaft 842 to rotate, thereby outputting power to the chain transmission mechanism. The transmission shaft 842 is fixedly connected coaxially with the rotating shaft of either the sprocket 82 or the tensioning wheel 83 to drive the entire chain transmission mechanism. As shown in the figure, the transmission shaft 842 and the rotating shaft of the tensioning wheel 83 are connected by a speed increase component 846, and the rotating shaft is rotatably arranged on the support plate. The function of the speed increase component 846 is to increase the hammering frequency. This implementation method effectively recycles the force generated by the movement of the trailer 1 itself, saving energy and reducing consumption.

[0056] Reference Figure 9 and Figure 10 : The speed increasing assembly 846 includes a first gear 8461 and a second gear 8462. The diameter of the first gear 8461 is larger than the diameter of the second gear 8462, and the first gear 8461 and the second gear 8462 are meshed. The first gear 8461 is in transmission connection with the transmission shaft 842, and the second gear 8462 is in transmission connection with the chain transmission mechanism.

[0057] The transmission shaft 842 rotates the first gear 8461, which in turn drives the second gear 8462. Because the diameter of the second gear 8462 is smaller than that of the first gear 8461, the angular velocity of the rotation is amplified and transmitted to the chain transmission mechanism. The second gear 8462 is coaxially and fixedly connected to the rotating shaft of either the sprocket 82 or the tensioning pulley 83 to drive the entire chain transmission mechanism. The figure shows the second gear 8462 coaxially and fixedly connected to the rotating shaft of the tensioning pulley 83. The rotating shaft is rotatably mounted on the support plate.

[0058] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the scope of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A mobile foundation compacting device for use in the airport foundation excavation phase, characterized in that: The invention comprises a trailer (1) and a first hammer head (2) mounted on the trailer (1) and capable of moving in a vertical direction; a vertically arranged hammer rod (3) is mounted on the first hammer head (2); a second hammer head (4) is movably sleeved on the hammer rod (3), and in a natural state, the second hammer head (4) presses against the upper part of the first hammer head (2); a first contact portion (5) and a second contact portion (6) are separately provided on the first hammer head (2) and the second hammer head (4); a lifting portion (7) and a motion control device (8) for controlling the movement of the lifting portion (7) are also movably provided on the trailer (1); The motion trajectory of the lifting portion (7) includes a first motion and a second motion that are connected and cyclically repeated with each other; In the first movement, the lifting portion (7) moves to the bottom of the first contact portion (5) and moves upward to abut against the first contact portion (5), thereby driving the first hammer head (2) and the second hammer head (4) to rise; In the second movement, the lifting portion (7) moves in the horizontal direction and is separated from the vertical downward projections of the first contact portion (5) and the second contact portion (6) in sequence at intervals in time, so that the first hammer head (2) and the second hammer head (4) fall down in intervals; The first contact portion (5) is a first crossbar (51) fixed to one side of the first hammer head (2), and the second contact portion (6) is a second crossbar (61) fixed to one side of the second hammer head (4). The first crossbar (51) and the second crossbar (61) extend in the same direction. In a natural state, the second crossbar (61) abuts against the top of the first crossbar (51), and the end of the second crossbar (61) extends outward from the end of the first crossbar (51). During the second movement, the lifting portion (7) moves along the extending direction of the first crossbar (51) and the second crossbar (61) and moves out of the end of the second crossbar (61) at the end of the stroke. The end of the first crossbar (51) has a slope (511) that allows the lifting portion (7) to move smoothly to the bottom of the second crossbar (61); The motion control device (8) includes a chain transmission mechanism composed of a chain (81), a sprocket (82) and a tensioning wheel (83) installed on the trailer (1), and a power assembly (84) for providing power to the chain transmission mechanism; the lifting part (7) is installed on the chain (81); The trailer (1) is also provided with a guide assembly (85) that cooperates with the chain transmission mechanism to improve the stability of the movement of the lifting part (7); the lifting part (7) is located between the chain transmission mechanism and the guide assembly (85); The guide assembly (85) includes a slider (851), a first slide groove (852) and a second slide groove (853); One end of the lifting portion (7) is mounted on the slider (851); The first chute (852) is mounted on the trailer (1); The second sliding groove (853) is slidably engaged with the first sliding groove (852) along the vertical direction; The slider (851) and the second slide groove (853) slide together in a horizontal direction; The lifting portion (7) includes a mounting shaft (71) and a roller (72) rotatably arranged on the mounting shaft (71); the mounting shaft (71) is connected to the motion control device (8); A guide assembly (12) is mounted on the trailer (1) to guide the vertical movement of the hammer rod (3); The guide assembly (12) includes a guide sleeve (121) and a support frame (122); The guide sleeve (121) and the hammer rod (3) are clearance-matched; Both ends of the support frame (122) are fixedly connected to the trailer (1) and the guide sleeve (121) respectively.

2. The mobile foundation compacting device for airport foundation excavation according to claim 1, characterized in that: The power assembly (84) is a rotary drive (841) mounted on the trailer (1).

3. The mobile foundation compacting device for airport foundation excavation according to claim 1, characterized in that: The trailer (1) has a rotating shaft (11) connected to wheels on both sides; the power assembly (84) includes a transmission shaft (842) for providing power to a chain transmission mechanism, a synchronous transmission assembly consisting of a first synchronous wheel (843), a second synchronous wheel (844) and a synchronous belt (845), the first synchronous wheel (843) being in transmission connection with the rotating shaft (11), and the second synchronous wheel (844) being in transmission connection with the transmission shaft (842); the power assembly (84) also includes a speed increasing assembly (846) for increasing the rotation speed of the transmission shaft (842) and outputting it to the chain transmission mechanism.

4. The mobile foundation compacting device for use in the airport foundation excavation stage according to claim 3, characterized in that: The speed increasing assembly (846) includes a first gear (8461) and a second gear (8462), wherein the diameter of the first gear (8461) is larger than the diameter of the second gear (8462), and the first gear (8461) and the second gear (8462) are meshed; The first gear (8461) is in transmission connection with the transmission shaft (842), and the second gear (8462) is in transmission connection with the chain transmission mechanism.

Images