Adjustable pile feeder

Abstract

The utility model provides a kind of adjustable pile feeder, it is related to building construction technology field, including pile feeder body, the front end of pile feeder body is detachably installed with transition mechanism, the transition mechanism includes mounting seat, locating ring, several positioning screw rods and locating nuts, the downside of mounting seat is fixed with transition subassembly, the upper end of mounting seat is provided with connecting ring, several positioning screw rods are rotatably connected on connecting ring, the upper along of locating ring is resisted by locating nut, the transition subassembly includes transition disc, transition fixed block and several transition sliders, displacement notch that is mutually parallel with sliding guide groove is provided on transition disc, sliding guide rod is provided on the upper side of transition slider, slidingly covers and is equipped with driving ring on the outer wall of mounting seat, the outer edge of driving ring is provided with several outward helical extension curve notches. In the utility model, the outer diameter of transition subassembly can be adjusted by driving ring, so that it is adapted to pile body, and eccentric impact is avoided.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to an adjustable pile driver. Background Technology

[0002] The pile driver is a key force transmission intermediary device in pile foundation construction. It is usually placed between the pile cap and the impact hammer. When the pile top sinks to below the working surface of the equipment, it plays the role of transmitting torque, safely, efficiently and accurately transferring the construction load to the pile top.

[0003] In pile foundation construction, it is common to encounter situations where the diameter of the pile driver is smaller than the diameter of the pile top. This makes it difficult to ensure that the pile driver is aligned with the pile body, which can easily lead to eccentric impact and cause the pile body to bend and crack. However, large pile drivers are usually expensive, and reselecting a suitable pile driver can seriously delay the construction period. The usual practice is to use a suitable transition steel plate welded to the bottom of the pile driver to solve the problem of diameter mismatch. However, the temporary installation of the transition steel plate, which involves welding the transition steel plate directly to the expensive pile driver, can cause thermal damage to the pile driver and leave weld scars during welding and disassembly, all of which can cause irreversible damage to the pile driver body. Summary of the Invention

[0004] Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides an adjustable pile driver, which solves the problems mentioned in the background section.

[0005] Technical solution To achieve the above objectives, this utility model provides the following technical solution: An adjustable pile driver includes a pile driver body. A transition mechanism is detachably mounted on the front end of the pile driver body. The transition mechanism includes a mounting base, a positioning ring, a plurality of positioning screws, and a positioning nut. A transition component is fixed to the lower side of the mounting base, and a connecting ring is provided at the upper end of the mounting base. The plurality of positioning screws are rotatably connected to the connecting ring. The positioning ring is fixed to the middle of the pile driver body. A plurality of positioning openings are provided on the outer edge of the positioning ring. The positioning screws slide through the positioning openings. The positioning nut is threadedly connected to the upper part of the positioning screws and abuts against the upper edge of the positioning ring.

[0006] Preferably, the transition component includes a transition disk, a transition block, and several transition sliders. The transition block is integrally formed and centrally located on the lower middle part of the transition disk. Several sliding guide grooves are provided on the outside of the transition disk, and guide strips that correspond to the sliding guide grooves are provided on the upper side of the transition sliders.

[0007] Preferably, the transition plate is provided with a displacement slot parallel to the sliding guide groove, the upper side of the transition slider is provided with a sliding guide rod, the outer wall of the mounting base is provided with a drive ring, the outer edge of the drive ring is provided with a plurality of outwardly spiraling curved slots, the sliding guide rod slides through the curved slots, and a locking mechanism is connected between the drive ring and the mounting base.

[0008] Preferably, the locking mechanism includes a fixed ratchet ring integrally formed on the upper side of the transition plate, a sliding ratchet ring integrally formed on the lower side of the drive ring, and an abutment spring connected between the connecting ring and the drive ring, wherein the fixed ratchet ring and the sliding ratchet ring mesh with each other.

[0009] Preferably, the outer edge of the connecting ring is provided with a plurality of connecting openings, a connecting pin is connected in the connecting opening, and a rotating cam is fixed at the lower end of the positioning screw, the rotating cam being rotatably connected to the connecting pin.

[0010] Preferably, a clamping ring is provided on the upper side of the drive ring, and the lowest point of the profile of the rotating cam abuts against the upper side of the clamping ring. Beneficial effects

[0011] This utility model provides an adjustable pile driver. It has the following advantages: In this invention, a transition block and several transition sliders together form a transition component for transmitting torque between the pile cap and the pile driver. The transition mechanism can be detachably fixed to the lower end of the pile driver body by means of a positioning screw, replacing the welding of the transition steel plate and avoiding problems such as heat damage and weld scars left by welding the transition steel plate.

[0012] In this invention, the rotating drive ring can push the sliding guide rod through the side wall of the curved groove, causing it to slide outward within the displacement groove. This causes several transition sliders to slide outward synchronously, thereby increasing the radius of the circle formed by the transition sliders and adjusting the radius of the entire transition assembly to accommodate piles with larger radii.

[0013] In this invention, under the action of the resisting spring, the fixed ratchet ring and the sliding ratchet ring can engage with each other in a free state to form a lock, preventing the transition slider with the adjusted inner diameter from shifting under impact. At the same time, the addition of a rotating cam can press against the upper side of the drive ring, so that the fixed ratchet ring and the sliding ratchet ring engage with each other during the pile driving process, and there will be no situation where vibration causes the ratchet ring to unlock. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an adjustable pile driver according to the present invention; Figure 2 This is an exploded view of an adjustable pile driver according to the present invention. Figure 3This is a cross-sectional view of an adjustable pile driver according to the present invention; Figure 4 This is a schematic diagram of the drive ring in this utility model.

[0015] In the diagram: 1. Pile driver body; 2. Positioning ring; 3. Connecting pin; 4. Mounting base; 5. Positioning screw; 6. Positioning nut; 7. Connecting ring; 8. Rotary cam; 9. Transition plate; 10. Transition block; 11. Transition slider; 12. Displacement slot; 13. Drive ring; 14. Curved slot; 15. Sliding guide rod; 16. Fixed ratchet ring; 17. Sliding ratchet ring; 18. Contact spring; 19. Pressure ring. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] This utility model embodiment provides an adjustable pile driver, such as... Figure 1-4 As shown, the device includes a pile driver body 1. A positioning ring 2 is provided in the middle of the outer wall of the pile driver body 1. The outer edge of the positioning ring 2 has several positioning openings. A transition mechanism is detachably installed at the front end of the pile driver body 1. The transition mechanism includes a mounting base 4, several positioning screws 5, and a positioning nut 6. The upper side of the mounting base 4 is provided with a slot that mates with the lower end of the pile driver body 1. The upper end of the mounting base 4 is provided with a connecting ring 7. The outer edge of the connecting ring 7 is provided with several connecting openings. A connecting pin 3 is connected inside the connecting openings. A rotating cam 8 is fixed to the lower end of the positioning screw 5. The rotating cam 8 is rotatably connected to the connecting pin 3. The positioning screw 5 can be rotated to be inserted into the positioning opening. The positioning nut 6 is threaded to the upper part of the positioning screw 5. The positioning nut 6 abuts against the upper edge of the positioning ring 2. Tightening the positioning nut 6 presses the mounting base 4 tightly against the lower end of the pile driver body 1. A transition component is fixed to the lower side of the mounting base 4, which can transmit the impact torque downward through the transition component.

[0018] A transition assembly is fixed to the lower side of the mounting base 4. The transition assembly includes a transition plate 9, a transition block 10, and several transition sliders 11. The transition block 10 is integrally formed and centrally located in the lower middle part of the transition plate 9. A displacement groove 12 is provided on the outer side of the transition plate 9. The extension direction of the displacement groove 12 is towards the axis of the transition plate 9. Two sliding guide grooves parallel to the displacement groove 12 are provided on both sides of the displacement groove 12. A guide strip is provided on the upper side of the transition slider 11 and is aligned with the sliding guide groove. Several transition sliders 11 can slide synchronously in and out on the transition plate 9. The lower edge of the transition block 10 is flush with the lower edge of the transition slider 11. The innermost side of several transition sliders 11 and the transition block 10 form the smallest circular transition surface. When several transition sliders 11 are on the outermost side, the transition block 10 and the transition sliders 11 together form the largest approximately circular transition surface. In this way, the transition surface can be adapted to the end of the pile body, making it easier for the transition surface to be aligned with the pile body and avoiding eccentric impact.

[0019] A drive ring 13 is slidably sleeved on the outer wall of the mounting base 4. The outer edge of the drive ring 13 is provided with a plurality of outwardly spiraling curved grooves 14. The curved grooves 14 are configured as involutes from the inside to the outside. A sliding guide rod 15 is provided on the upper side of the transition slider 11. The sliding guide rod 15 slides through the curved grooves 14. The inner wall of the curved grooves 14 slides against the outer wall of the sliding guide rod 15. Rotating the drive ring 13 can push the sliding guide rod 15 by pressing against the side wall of the curved grooves 14, which can provide driving force for the inward and outward sliding of the transition slider 11.

[0020] A locking mechanism is connected between the drive ring 13 and the mounting base 4. The locking mechanism includes a fixed ratchet ring 16, a sliding ratchet ring 17, and an abutment spring 18. The fixed ratchet ring 16 is integrally formed on the upper side of the transition plate 9, and the sliding ratchet ring 17 is integrally formed on the lower side of the drive ring 13. The fixed ratchet ring 16 and the sliding ratchet ring 17 mesh with each other. The two ends of the abutment spring 18 abut against the connecting ring 7 and the drive ring 13. A clamping ring 19 is provided on the upper side of the drive ring 13. The lowest point of the profile of the rotary cam 8 is located directly below the positioning screw 5. When the positioning screw 5 is in a vertical state, the lowest point of the profile of the rotary cam 8 just abuts against the upper side of the clamping ring 19. That is, when the transition mechanism is fixed at the lower end of the pile feeder body 1, the rotary cam 8 abuts against the clamping ring 19. During the impact pile feeding process, there will be no rebound vibration that causes the abutment spring 18 to contract. In other words, after the transition slider 11 is adjusted to the correct position, the impact will not cause displacement, and the impact will remain aligned.

[0021] Working principle: In this invention, when it is necessary to adjust the size of the transition surface of the pile driver, the drive ring 13 can be pulled upwards to disengage the sliding ratchet ring 17 on the drive ring 13 from the fixed ratchet ring 16 on the transition plate 9, thereby unlocking the drive ring 13. While pulling, the drive plate is rotated, and the sliding guide rod 15 on the transition slider 11 can be pressed and pushed by the side wall of the involute curved groove 14 on the drive plate. Under the guidance of the displacement groove 12, it slides inward and outward, which can simultaneously push the position of several transition sliders 11. The radius of the approximately circular transition ring formed by several transition sliders 11 can be adjusted, and together with the transition fixing block 10 in the middle, they form a transition surface. By adapting the transition surface to the inner diameter of the top of the pile body, the transition surface is more easily aligned with the pile body. During impact pile driving, the pile driving torque can be accurately transmitted to the top of the pile, avoiding pile bending and cracking caused by eccentric impact.

[0022] In addition, after adjusting the size, it can be fixed to the bottom of the pile driver body 1 by positioning bolts. The lower end of the pile driver body 1 is engaged with the slot, so that the pile driving torque of the pile driver body 1 can be transmitted to the transition block 10 and several transition sliders 11 through the transition plate 9, and further transmitted to the top of the pile body. During the fixing process, the rotating positioning screw 5 causes the rotating cam 8 to gradually rotate and press against the upper side of the clamping ring 19, so that the fixing ratchet ring 16 and the sliding ratchet ring 17 are tightly engaged, so that they will not separate due to shock under the impact of pile driving, so that the transition line will not be displaced, and ensure that the transition component at the lower end of the pile driver is always aligned with the pile body during the pile driving process.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable pile driver, comprising a pile driver body, characterized in that: The front end of the pile driver body is detachably equipped with a transition mechanism, which includes a mounting base, a positioning ring, several positioning screws and a positioning nut. A transition component is fixed to the lower side of the mounting base, and a connecting ring is provided at the upper end of the mounting base. Several positioning screws are rotatably connected to the connecting ring. The positioning ring is fixed in the middle of the pile driver body. Several positioning openings are provided on the outer edge of the positioning ring. The positioning screws slide through the positioning openings. The positioning nut is threadedly connected to the upper part of the positioning screw and abuts against the upper edge of the positioning ring.

2. The adjustable pile driver according to claim 1, characterized in that: The transition assembly includes a transition disk, a transition block, and several transition sliders. The transition block is integrally formed and centrally located on the lower middle part of the transition disk. Several sliding guide grooves are provided on the outside of the transition disk, and guide strips that correspond to the sliding guide grooves are provided on the upper side of the transition sliders.

3. An adjustable pile driver according to claim 2, characterized in that: The transition plate is provided with a displacement slot parallel to the sliding guide groove. A sliding guide rod is provided on the upper side of the transition slider. A drive ring is slidably sleeved on the outer wall of the mounting base. The outer edge of the drive ring is provided with several outward spiraling curved slots. The sliding guide rod slides through the curved slots. A locking mechanism is connected between the drive ring and the mounting base.

4. An adjustable pile driver according to claim 3, characterized in that: The locking mechanism includes a fixed ratchet ring integrally formed on the upper side of the transition plate, a sliding ratchet ring integrally formed on the lower side of the drive ring, and an abutment spring connected between the connecting ring and the drive ring. The fixed ratchet ring and the sliding ratchet ring mesh with each other.

5. An adjustable pile driver according to claim 4, characterized in that: The outer edge of the connecting ring is provided with several connecting openings, and a connecting pin is connected inside the connecting opening. The lower end of the positioning screw is fixed with a rotating cam, and the rotating cam is rotatably connected to the connecting pin.

6. An adjustable pile driver according to claim 5, characterized in that: A clamping ring is provided on the upper side of the drive ring, and the lowest point of the profile of the rotating cam abuts against the upper side of the clamping ring.

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