Convenient stable pile driver for engineering

Abstract

The invention relates to the technical field of engineering pile drivers, in particular to a convenient stable pile driver for engineering, which comprises a moving vehicle body, a mounting plate is rotatably connected to the upper part of the moving vehicle body, a leveling mechanism is further arranged between the mounting plate and the moving vehicle body, and a mounting frame is fixedly connected to the mounting plate. A drilling mechanism is arranged on the mounting frame, a stabilizing mechanism is further arranged on the mounting frame, the stabilizing mechanism is connected with the drilling mechanism, a gravity center adjusting mechanism is further arranged on the mounting plate, and the gravity center adjusting mechanism is connected with the drilling mechanism. According to the drilling device, through the arranged leveling mechanism, when the movable vehicle body inclines due to vibration of the drilling mechanism, a metal ball can roll under the action of gravity, a hydraulic rod control circuit is switched on, a hydraulic rod is controlled to ascend and descend so as to enable the mounting plate to return to the horizontal position again, the drilling mechanism on the mounting plate is kept vertical, and the drilling effect is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of engineering pile drivers, in particular to a convenient and stable pile driver for engineering. Background Art

[0002] The screw pile driver is a kind of equipment used for drilling and piling, mainly used for dry drilling, grouting replacement and other construction methods. The screw pile driver is mainly composed of a power head, a drill rod, a column, a hydraulic crawler chassis, a rotary structure, a winch, an operating room, an electrical system, a hydraulic system, a shipping mechanism, etc. In the working state, by manipulating the hydraulic system, walking, rotating, raising and lowering the column and the pile driver can be realized. When working, the power head drives the drill rod, the drill bit rotates, and the winch controls the lifting and lowering of the drill tool. The soil cut by the drill is transported to the ground by the spiral blade.

[0003] The existing patent (Announcement No.: CN116717182B) discloses a stable pile driver for mobile engineering machinery, including a mobile machine base, a pile driving base for installing a pile driving device is fixedly installed on the right side of the mobile machine base, a pile driving frame is fixedly installed on the upper side of the pile driving base, a support seat for supporting the pile driving device is movably installed on the right side of the pile driving frame, a driving motor is arranged on the upper side of the support seat, and a spiral drill rod is fixedly connected to the bottom of the driving motor by the output end. The stable pile driver for mobile engineering machinery preliminarily alleviates the vibration intensity through a shock-absorbing plate and a shock-absorbing spring, and at the same time uses a reset main rod to contact the upper wire rope and the lower wire rope, so as to achieve the purpose of buffering and resetting the vibrating and shaking upper wire rope and the lower wire rope, and keep them stable, thereby simultaneously improving the stability of the spiral drill rod, effectively avoiding affecting the normal operation of the equipment, and further improving its use effect. In the process of realizing the above invention, the inventors found the following problems: when the pile driver is drilling, the rotation of the auger rod will generate vibration, causing the mobile base placed on the ground to sink. Since the positions of the two ends of the mobile base from the auger rod are different, the two ends of the mobile base sink to different distances, causing the mobile base to tilt, affecting the drilling process. Summary of the invention

[0004] The purpose of the present invention is to provide a convenient and stable pile driver for engineering to solve the problems raised in the above background technology. To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A convenient and stable pile driver for engineering purposes comprises a mobile body, a mounting plate is rotatably connected to the top of the mobile body, a leveling mechanism is further provided between the mounting plate and the mobile body, a mounting frame is fixedly connected to the mounting plate, a drilling mechanism is provided on the mounting frame, a stabilizing mechanism is further provided on the mounting frame, the stabilizing mechanism is connected to the drilling mechanism, a center of gravity adjusting mechanism is further provided on the mounting plate, and the center of gravity adjusting mechanism is connected to the drilling mechanism.

[0006] Preferably, the mobile vehicle body includes a frame, the lower end of the frame is rotatably connected to four wheels, four hydraulic support feet extending downward are evenly and fixedly connected to the frame, and two symmetrically arranged support plates are also fixedly connected to the frame, and mounting plates are rotatably connected to the two support plates.

[0007] Preferably, the leveling mechanism includes a hydraulic rod, four of which are evenly arranged between the mounting plate and the frame, and both ends of the hydraulic rod are rotatably connected to the mounting plate and the frame respectively; the stabilizing mechanism also includes a trigger assembly, and the trigger assembly includes a mounting box, in which four conductive rods 1 are evenly fixedly connected, and a metal ball that can roll freely is placed between the four conductive rods 1, and two springs 1 are fixedly connected to the inner wall of the mounting box, and the end of the spring 1 is also in contact with the metal ball, and two conductive rods 2 are symmetrically fixedly connected to both ends of the mounting box, and a limiting assembly is also provided on the mounting box.

[0008] Preferably, the four conductive rods 1 and the two conductive rods 2 are connected to the control circuit of the hydraulic rod through wires, and when the metal ball is in contact with the conductive rod 2, the circuit between the conductive rod 1 and the conductive rod 2 is connected.

[0009] Preferably, the drilling mechanism includes a driving motor 1, which is fixedly connected to a mounting frame, a screw rod 1 is rotatably connected to the mounting frame, and the screw rod 1 is fixedly connected to the output end of the driving motor 1. The mounting frame is also slidably connected to a connecting frame, which is threadedly connected to the screw rod 1, a driving motor 2 is fixedly connected to the connecting frame, and a drill rod is rotatably connected to the connecting frame, and the drill rod is fixedly connected to the output end of the driving motor 2.

[0010] Preferably, the stabilizing mechanism comprises a plurality of clamping assemblies, a plurality of the clamping assemblies are evenly fixedly connected to the mounting frame, a plurality of the clamping assemblies are symmetrically arranged in pairs, the clamping assemblies comprise a fixed bracket, two connecting rods arranged in parallel are rotatably connected to the fixed bracket, the ends of the two connecting rods are also rotatably connected to the clamping bracket, four bull's eye bearings are evenly fixedly connected to the clamping bracket, and the balls on the bull's eye bearings are in contact with the surface of the drill rod.

[0011] Preferably, two guide rods are fixedly connected in parallel to the fixed bracket, a slider is slidably connected to the guide rod, and a screw rod 2 is also rotatably connected to the fixed bracket. The slider is threadedly connected to the screw rod 2, and a groove is provided on the slider. One of the connecting rods is fixedly connected to a guide rod 1, and the guide rod 1 is slidably connected in the groove. One end of the screw rod 2 is fixedly connected to a spur gear, and two extension brackets are symmetrically fixedly connected to the connecting frame. The extension brackets are fixedly connected to a rack, and the rack will mesh with the spur gear on the same side during movement.

[0012] Preferably, the center of gravity adjustment mechanism includes a rotating rod, which is rotatably connected to the mounting frame, a variable pitch spiral groove is opened on the rotating rod, the connecting frame is fixedly connected to a connecting seat, a guide rod 2 is fixedly connected to the connecting seat, the guide rod 2 is slidably connected in the variable pitch spiral groove, a screw rod 3 is rotatably connected to the mounting plate, a bevel gear transmission assembly is connected between the screw rod 3 and the rotating rod, and a counterweight block is also slidably connected to the mounting plate, and the counterweight block is threadedly connected to the screw rod 3.

[0013] Preferably, the limiting assembly includes a movable rod, which is slidably connected to the installation box, one end of the movable rod is fixedly connected to a flexible pressure plate, the flexible pressure plate presses the metal ball, the other end of the movable rod abuts against a wedge block, the wedge block is fixedly connected to a counterweight block, a retaining ring is provided on the movable rod, and a spring 2 is connected between the retaining ring and the installation box.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In the present invention, by setting a leveling mechanism, when the mobile body is tilted due to the vibration of the drilling mechanism, the metal ball will roll under the action of gravity, connecting the hydraulic rod control circuit, controlling the lifting of the hydraulic rod to return the mounting plate to a horizontal position, so that the drilling mechanism on the mounting plate remains vertical, thereby ensuring the drilling effect.

[0016] In the present invention, the stabilizing mechanism is provided to clamp the drill rod without affecting the movement and rotation of the drill rod itself, thereby ensuring the stability of the drill rod during drilling. When the connecting frame moves downward, it can also automatically open to avoid the connecting frame, thereby avoiding obstruction to the downward movement of the connecting frame.

[0017] In the present invention, by setting up the center of gravity adjustment mechanism, as the connecting frame moves downward, the position of the counterweight block can be automatically adjusted to ensure that the center of gravity position of the device remains basically unchanged during the continuous downward movement of the drill rod, so that the device itself can be more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the mobile vehicle body in the present invention;

[0020] Figure 3 It is a structural schematic diagram of the leveling mechanism in the present invention;

[0021] Figure 4 It is a structural schematic diagram of the drilling mechanism in the present invention;

[0022] Figure 5 It is a structural schematic diagram of the stabilizing mechanism in the present invention;

[0023] Figure 6 for Figure 5 A local enlarged schematic diagram of the middle A;

[0024] Figure 7 It is a structural schematic diagram of the center of gravity adjustment mechanism in the present invention;

[0025] Figure 8 for Figure 7 A local enlarged schematic diagram of point B in the middle.

[0026] In the figure: 1. mobile body; 101. frame; 102. wheel; 103. hydraulic support foot; 104. support plate; 2. mounting plate; 3. leveling mechanism; 301. hydraulic rod; 302. trigger assembly; 3021. mounting box; 3022. conductive rod 1; 3023. metal ball; 3024. spring 1; 3025. conductive rod 2; 303. limit assembly; 3031. movable rod; 3032. flexible pressure plate; 3033. wedge block; 3034. retaining ring; 3035. spring 2; 4. mounting frame; 5. drilling mechanism; 501. driving motor 1; 502. screw rod 1; 503. connecting frame; 504, driving motor 2; 505, drill rod; 6, stabilizing mechanism; 61, clamping assembly; 6101, fixing bracket; 6102, connecting rod; 6103, clamping bracket; 6104, bull's eye bearing; 6105, guide rod; 6106, slider; 6107, screw rod 2; 6108, groove; 6109, guide rod 1; 6110, spur gear; 6111, extension bracket; 6112, rack; 7, center of gravity adjustment mechanism; 701, rotating rod; 702, variable pitch spiral groove; 703, connecting seat; 704, guide rod 2; 705, screw rod 3; 706, bevel gear transmission assembly; 707, counterweight. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figures 1 to 8 , the present invention provides a technical solution:

[0029] A convenient and stable pile driver for engineering purposes comprises a mobile body 1, a mounting plate 2 is rotatably connected to the top of the mobile body 1, a leveling mechanism 3 is further provided between the mounting plate 2 and the mobile body 1, a mounting frame 4 is fixedly connected to the mounting plate 2, a drilling mechanism 5 is provided on the mounting frame 4, a stabilizing mechanism 6 is further provided on the mounting frame 4, the stabilizing mechanism 6 is connected to the drilling mechanism 5, a center of gravity adjusting mechanism 7 is further provided on the mounting plate 2, and the center of gravity adjusting mechanism 7 is connected to the drilling mechanism 5.

[0030] In this embodiment, the mobile body 1 includes a frame 101, and four wheels 102 are rotatably connected to the lower end of the frame 101. Four hydraulic support feet 103 extending downward are evenly and fixedly connected to the frame 101. Two symmetrically arranged support plates 104 are also fixedly connected to the frame 101, and the two support plates 104 are rotatably connected to the mounting plates 2.

[0031] In this embodiment, the leveling mechanism 3 includes a hydraulic rod 301, and four hydraulic rods 301 are evenly arranged between the mounting plate 2 and the frame 101. The two ends of the hydraulic rod 301 are rotatably connected to the mounting plate 2 and the frame 101 respectively. The stabilizing mechanism 6 also includes a trigger component 302, and the trigger component 302 includes a mounting box 3021. Four conductive rods 1 3022 are evenly fixedly connected in the mounting box 3021, and a metal ball 3023 that can roll freely is placed between the four conductive rods 1 3022. Two springs 1 3024 are fixedly connected to the inner wall of the mounting box 3021, and the end of the spring 1 3024 is also in contact with the metal ball 3023. Two conductive rods 2 3025 are symmetrically fixedly connected at both ends of the mounting box 3021, and a limit component 303 is also provided on the mounting box 3021.

[0032] In this embodiment, the four conductive rods 1 3022 and the two conductive rods 2 3025 are connected to the control circuit of the hydraulic rod 301 through wires. When the metal ball 3023 is in contact with the conductive rod 2 3025, the circuit between the conductive rod 1 3022 and the conductive rod 2 3025 is connected.

[0033] In this embodiment, when the metal ball 3023 is in the middle position, the two springs 1 3024 are both in contact with the metal ball 3023 but are not subjected to force. When the installation box 3021 is tilted, the metal ball 3023 rolls and compresses the spring 1 3024. When the installation box 3021 returns to the horizontal position, the compressed spring 1 3024 will push the metal ball 3023 back to the middle position.

[0034] In this embodiment, the drilling mechanism 5 includes a driving motor 501, and the driving motor 501 is fixedly connected to the mounting frame 4. The mounting frame 4 is also rotatably connected to a screw rod 502, and the screw rod 502 is fixedly connected to the output end of the driving motor 501. The mounting frame 4 is also slidably connected to a connecting frame 503, and the connecting frame 503 is threadedly connected to the screw rod 502. The connecting frame 503 is fixedly connected to a driving motor 2 504, and the connecting frame 503 is also rotatably connected to a drill rod 505, and the drill rod 505 is fixedly connected to the output end of the driving motor 2 504.

[0035] In this embodiment, the stabilizing mechanism 6 includes a plurality of clamping assemblies 61, and the plurality of clamping assemblies 61 are evenly fixedly connected to the mounting frame 4, and the plurality of clamping assemblies 61 are symmetrically arranged in pairs, and the clamping assemblies 61 include a fixed bracket 6101, and two parallel connecting rods 6102 are rotatably connected to the fixed bracket 6101, and the ends of the two connecting rods 6102 are also rotatably connected to a clamping bracket 6103, and four bull's eye bearings 6104 are evenly fixedly connected to the clamping bracket 6103, and the balls on the bull's eye bearings 6104 are in contact with the surface of the drill rod 505.

[0036] In this embodiment, the bull's eye bearing 6104 selected on the clamping bracket 6103 is a universal ball bearing, which will not hinder the drill rod 505 that rotates and moves at the same time, and the bull's eye bearing 6104 is distributed in two rows on the clamping bracket 6103, which has a better restrictive effect on the drill rod 505 and ensures the stability of the drill rod 505 during the drilling process.

[0037] In this embodiment, two guide rods 6105 are fixedly connected in parallel to the fixed bracket 6101, and a slider 6106 is slidably connected to the guide rod 6105. The fixed bracket 6101 is also rotatably connected to a screw rod 2 6107, and the slider 6106 is threadedly connected to the screw rod 2 6107. A groove 6108 is provided on the slider 6106, and a guide rod 1 6109 is fixedly connected to one of the connecting rods 6102, and the guide rod 1 6109 is slidably connected in the groove 6108. A spur gear 6110 is fixedly connected to one end of the screw rod 2 6107, and two extension brackets 6111 are symmetrically fixedly connected to the connecting frame 503. A rack 6112 is fixedly connected to the extension bracket 6111, and the rack 6112 will mesh with the spur gear 6110 on the same side during movement.

[0038] In this embodiment, the center of gravity adjustment mechanism 7 includes a rotating rod 701, which is rotatably connected to the mounting frame 4, and a variable pitch spiral groove 702 is provided on the rotating rod 701. The connecting frame 503 is fixedly connected to a connecting seat 703, and a guide rod 2 704 is fixedly connected to the connecting seat 703. The guide rod 2 704 is slidably connected in the variable pitch spiral groove 702. A screw rod 3 705 is rotatably connected to the mounting plate 2, and a bevel gear transmission assembly 706 is connected between the screw rod 3 705 and the rotating rod 701. A counterweight block 707 is also slidably connected to the mounting plate 2, and the counterweight block 707 is threadedly connected to the screw rod 3 705.

[0039] In this embodiment, during the drilling process, the movement of the drill rod 505 will change the center of gravity of the device, and the change in the center of gravity of the device does not occur uniformly. The variable pitch spiral groove 702 can convert the uniform downward movement of the connecting frame 503 into the uneven movement of the counterweight block 707, so that the movement of the counterweight block 707 can balance the center of gravity, thereby ensuring that the center of gravity of the device remains basically unchanged.

[0040] In this embodiment, the limiting assembly 303 includes a movable rod 3031, which is slidably connected to the installation box 3021. One end of the movable rod 3031 is fixedly connected to a flexible pressure plate 3032, and the flexible pressure plate 3032 presses the metal ball 3023. The other end of the movable rod 3031 abuts against a wedge block 3033, and the wedge block 3033 is fixedly connected to a counterweight block 707. A retaining ring 3034 is provided on the movable rod 3031, and a spring 2 3035 is connected between the retaining ring 3034 and the installation box 3021.

[0041] The working process of this convenient engineering stable pile driver is as follows:

[0042] The vehicle is moved to the drilling position by the traction device of the front of the vehicle, and then the hydraulic support foot 103 is extended, and the hydraulic support foot 103 is abutted against the ground and the device is propped up. When drilling, the driving motor 2 504 is started, and the driving motor 2 504 drives the drill rod 505 to rotate, and then the driving motor 1 501 is started, and the driving motor 1 501 drives the screw rod 1 502 connected thereto to rotate, and the screw rod 1 502 drives the connecting frame 503 threadedly connected thereto to slowly move downward along the mounting frame 4, so that the drill rod 505 is drilled into the soil to complete the drilling;

[0043] When the connecting frame 503 moves downward, the rack 6112 connected to it through the extension bracket 6111 also moves downward. When the rack 6112 moves downward, it will mesh with the spur gear 6110, driving the spur gear 6110 and the second screw rod 6107 to rotate. The second screw rod 6107 drives the slider 6106 threadedly connected thereto to slide along the guide rod 6105. Since the guide rod 1 6109 is slidably connected to the groove 6108 of the slider 6106, the slider 6106 pushes the connecting rod 6102 to rotate through the guide rod 1 6109, so that the two opposite clamping brackets 6103 are separated outward, so as to prevent the clamping brackets 6103 from blocking the downward movement of the connecting frame 503.

[0044] During the downward movement of the connecting frame 503, the connecting seat 703 and the guide rod 2 704 will also move downward. Since the guide rod 2 704 is slidably connected in the variable pitch spiral groove 702, the rotating rod 701 will rotate as the guide rod 2 704 moves downward. The rotating rod 701 drives the screw rod 3 705 to rotate through the bevel gear transmission assembly 706. The screw rod 3 705 drives the counterweight block 707 threadedly connected thereto to slide along the mounting plate 2 to adjust the overall center of gravity of the device.

[0045] During the movement of the counterweight block 707, the wedge block 3033 will move accordingly, loosening the restriction on the movable rod 3031. The movable rod 3031 will move under the elastic force of the spring 2 3035, so that the flexible pressure plate 3032 loosens the restriction on the metal ball 3023. When the device is tilted, the metal ball 3023 will roll along the conductive rod 1 3022 under the action of gravity, compress the spring 1 3024 and abut against the conductive rod 2 3025, so that the circuit is connected, and the hydraulic rod 301 is controlled to extend or contract, so that the mounting plate 2 returns to a horizontal state. At this time, the metal ball 3023 will be pushed away by the reset spring 1 3024, so that the metal ball 3023 is separated from the conductive rod 2 3025, and the movement of the hydraulic rod 301 is stopped.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A convenient and stable pile driver for engineering use, comprising a mobile body (1), characterized in that: A mounting plate (2) is rotatably connected above the mobile body (1); a leveling mechanism (3) is also provided between the mounting plate (2) and the mobile body (1); a mounting frame (4) is fixedly connected to the mounting plate (2); a drilling mechanism (5) is provided on the mounting frame (4); a stabilizing mechanism (6) is also provided on the mounting frame (4); the stabilizing mechanism (6) is connected to the drilling mechanism (5); a center of gravity adjusting mechanism (7) is also provided on the mounting plate (2); the center of gravity adjusting mechanism (7) is connected to the drilling mechanism (5).

2. A convenient and stable pile driver for engineering use according to claim 1, characterized in that: The mobile vehicle body (1) comprises a vehicle frame (101), the lower end of which is rotatably connected to four wheels (102), the vehicle frame (101) being evenly and fixedly connected to four downwardly extending hydraulic support legs (103), the vehicle frame (101) being also fixedly connected to two symmetrically arranged support plates (104), the two support plates (104) being rotatably connected to mounting plates (2).

3. A convenient and stable pile driver for engineering use according to claim 2, characterized in that: The leveling mechanism (3) comprises a hydraulic rod (301), four of the hydraulic rods (301) are evenly arranged between the mounting plate (2) and the vehicle frame (101), two ends of the hydraulic rod (301) are rotatably connected to the mounting plate (2) and the vehicle frame (101), and the stabilizing mechanism (6) further comprises a trigger assembly (302), the trigger assembly (302) comprises a mounting box (3021), and four conductive rods are evenly fixedly connected to the mounting box (3021). (3022), a metal ball (3023) capable of rolling freely is placed between the four conductive rods (3022), two springs (3024) are fixedly connected to the inner wall of the installation box (3021), and the ends of the springs (3024) are also in contact with the metal ball (3023), two conductive rods (3025) are symmetrically fixedly connected at both ends of the installation box (3021), and a limit assembly (303) is also provided on the installation box (3021).

4. A convenient and stable pile driver for engineering use according to claim 3, characterized in that: The four conductive rods 1 (3022) and the two conductive rods 2 (3025) are all connected to the control circuit of the hydraulic rod (301) through electric wires. When the metal ball (3023) is in contact with the conductive rod 2 (3025), the circuit between the conductive rod 1 (3022) and the conductive rod 2 (3025) is connected.

5. A convenient and stable pile driver for engineering use according to claim 4, characterized in that: The drilling mechanism (5) comprises a driving motor 1 (501), the driving motor 1 (501) being fixedly connected to a mounting frame (4), the mounting frame (4) being rotatably connected to a screw rod 1 (502), the screw rod 1 (502) being fixedly connected to an output end of the driving motor 1 (501), the mounting frame (4) being slidably connected to a connecting frame (503), the connecting frame (503) being threadedly connected to the screw rod 1 (502), the connecting frame (503) being fixedly connected to a driving motor 2 (504), the connecting frame (503) being rotatably connected to a drill rod (505), the drill rod (505) being fixedly connected to the output end of the driving motor 2 (504).

6. A convenient and stable pile driver for engineering use according to claim 5, characterized in that: The stabilizing mechanism (6) comprises a plurality of clamping assemblies (61), wherein the plurality of clamping assemblies (61) are evenly fixedly connected to the mounting frame (4), and the plurality of clamping assemblies (61) are symmetrically arranged in pairs, and the clamping assemblies (61) comprise a fixing bracket (6101), and two parallel connecting rods (6102) are rotatably connected to the fixing bracket (6101), and the ends of the two connecting rods (6102) are also rotatably connected to a clamping bracket (6103), and four bull's eye bearings (6104) are evenly fixedly connected to the clamping bracket (6103), and the balls on the bull's eye bearings (6104) are in contact with the surface of the drill rod (505); The fixed bracket (6101) is fixedly connected with two guide rods (6105) in parallel, and the guide rods (6105) are slidably connected with a slider (6106). The fixed bracket (6101) is also rotatably connected with a second screw rod (6107). The slider (6106) is threadedly connected to the second screw rod (6107). A groove (6108) is provided on the slider (6106). One of the connecting rods (6102) is fixedly connected with a Guide rod one (6109), the guide rod one (6109) is slidably connected in the groove (6108), one end of the screw rod two (6107) is fixedly connected to a spur gear (6110), and two extension brackets (6111) are symmetrically fixedly connected to the connecting frame (503), and the extension bracket (6111) is fixedly connected to a rack (6112), and the rack (6112) will mesh with the spur gear (6110) on the same side during the movement.

7. A convenient and stable pile driver for engineering use according to claim 6, characterized in that: The center of gravity adjustment mechanism (7) comprises a rotating rod (701), the rotating rod (701) is rotatably connected to the mounting frame (4), a variable pitch spiral groove (702) is provided on the rotating rod (701), the connecting frame (503) is fixedly connected to a connecting seat (703), a second guide rod (704) is fixedly connected to the connecting seat (703), the second guide rod (704) is slidably connected in the variable pitch spiral groove (702), a third screw rod (705) is rotatably connected to the mounting plate (2), a bevel gear transmission assembly (706) is connected between the third screw rod (705) and the rotating rod (701), and a counterweight block (707) is also slidably connected to the mounting plate (2), and the counterweight block (707) is threadedly connected to the third screw rod (705).

8. A convenient and stable pile driver for engineering use according to claim 7, characterized in that: The limit assembly (303) includes a movable rod (3031), the movable rod (3031) is slidably connected to the installation box (3021), one end of the movable rod (3031) is fixedly connected to a flexible pressure plate (3032), the flexible pressure plate (3032) presses the metal ball (3023), the other end of the movable rod (3031) abuts against a wedge block (3033), the wedge block (3033) is fixedly connected to a counterweight block (707), a retaining ring (3034) is provided on the movable rod (3031), and a spring 2 (3035) is connected between the retaining ring (3034) and the installation box (3021).

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