Rotary positioning chuck mechanism of pile driver

Abstract

The rotary positioning chuck mechanism comprises a drill section body, an upper connecting column, a lower connecting column and a lower sealing cover, the upper connecting column and the lower connecting column are fixed to the upper end and the lower end of the drill section body respectively, the lower sealing cover is fixed to the bottom end of the lower connecting column in a bolted mode, and four annular C-opening arms are rotationally installed at the edge of the bottom end of the lower sealing cover at equal intervals. And a gear transmission structure used for keeping the four C-opening arms in a co-rotating state is mounted in the lower connecting column. Each C-opening arm is driven to rotate through the worm and gear rotating locking structure and the gear transmission structure until the C-opening arms and the upper connecting column are clamped, only the worm and gear rotating locking structure needs to be rotated to enable each C-opening arm to reset during disassembly, and then the head ends and the tail ends of the two drill joint bodies are separated.

Description

Technical Field

[0001] The invention relates to the technical field of pile driver drill rod connection, in particular to a pile driver rotary positioning chuck mechanism. Background Art

[0002] The connection structure between the drill rod sections of a pile driver plays an important role in construction. It is primarily responsible for transmitting torque and power, ensuring sealing, facilitating installation and disassembly, and improving durability. Common connection methods include threaded connections, clamp-type connections, and quick connectors, of which threaded connections are the most common. Threaded connections are achieved by screwing the threads at both ends, ensuring a tight connection and good sealing performance. During the connection process, construction personnel need to check that the threads are intact, clean them, apply sealing oil or install sealing rings, then align the threads and slowly tighten them to the specified torque to ensure a secure connection and good sealing. After completion, a trial run and inspection are required to ensure there are no abnormalities. The entire operation process emphasizes the use of professional tools to avoid damaging the threads, and the connection status must be checked regularly, and loose or damaged parts must be repaired in a timely manner. However, at this stage, after use, the threads of the threaded drill pipe connection structure are often subjected to high-pressure mud, chemical corrosion and mechanical wear, resulting in deformation, scratches and even microcracks on the thread surface. These deformations and wear increase the friction between the threads, making greater torque required for disassembly, especially after high-torque tightening. Disassembly requires even greater torque and more professional tools, and sometimes even mechanical assistance or destructive disassembly, which increases the difficulty and cost of construction. Summary of the Invention

[0003] The purpose of the present invention is to provide a rotary positioning chuck mechanism for a pile driver. When connecting the head and tail ends of two drill segment bodies, the four C-arms at the lower end of one drill segment body are inserted into the upper connecting column at the upper end of the other drill segment body. Each C-arm is driven to rotate by a worm gear rotation locking structure and a gear transmission structure until the C-arm is completely engaged with the upper connecting column. When disassembling, it is only necessary to rotate the worm gear rotation locking structure and reset each C-arm, and then separate the head and tail ends of the two drill segment bodies, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a rotating positioning chuck mechanism for a pile driver, comprising a drill section body, an upper connecting column fixed to the upper and lower ends of the drill section body respectively, a lower connecting column, and a lower sealing cover bolted and fixed to the bottom end of the lower connecting column, four C-mouth arms with equal spacing in a ring are rotatably installed at the edge position of the bottom end of the lower sealing cover, a gear transmission structure for keeping the four C-mouth arms in a co-rotating state is installed inside the lower connecting column, a worm gear rotation locking structure for driving one of the C-mouth arms to rotate is installed on one side of the interior of the lower connecting column, and the upper connecting column is used to be clamped with the four C-mouth arms at the lower end of another drill section body.

[0005] Preferably, four hollow cavities are provided in an annular manner with equal intervals inside the upper connecting column, a fan-shaped protrusion is integrally formed on the inner wall of one side of the hollow cavity, and a completely penetrating rectangular notch is provided inside the fan-shaped protrusion.

[0006] Preferably, the top of the upper connecting column is provided with a rectangular hollow portion interconnected with the hollow cavity, and the left and right outer walls of the fan-shaped protrusion are both provided with rear slots, and the C-mouth arm enters into the rectangular notch of the fan-shaped protrusion through the rectangular hollow portion.

[0007] Preferably, the gear transmission structure includes four side gear shafts rotatably mounted at the inner edge of the lower connecting column and a central gear ring rotatably mounted at the inner center axis of the lower connecting column, and the central gear ring is meshed with the four side gear shafts.

[0008] Preferably, the bottom end of the side gear shaft passes through the outside of the lower sealing cover and is fixedly connected to the top end of the C-mouth arm.

[0009] Preferably, the worm gear rotation locking structure includes a worm gear plate fixed on one end of the surface of one of the side gear shafts, a worm shaft rotatably mounted on one side of the inner side of the lower connecting column, and a hexagonal groove provided at one end of the worm shaft, and the worm shaft and worm gear plate are engaged with each other.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the pile driver rotary positioning chuck mechanism is provided with a drill section body, an upper connecting column, a lower connecting column, four C-mouth arms, a gear transmission structure and a worm gear rotation locking structure and other structures that cooperate with each other. When connecting the head and tail ends of the two drill section bodies, the four C-mouth arms at the lower end of one drill section body are inserted into the upper connecting column at the upper end of the other drill section body, and each C-mouth arm is driven to rotate by the worm gear rotation locking structure and the gear transmission structure until the C-mouth arm is completely engaged with the upper connecting column. When disassembling, it is only necessary to rotate the worm gear rotation locking structure and reset each C-mouth arm, and then separate the head and tail ends of the two drill section bodies; wherein, through the rotation drive of the worm gear and the gear transmission structure, multiple C-mouth arms are The arms can rotate synchronously and evenly, ensuring that each C-arm can be accurately inserted into the corresponding upper connecting column during the connection process, achieving fast and reliable clamping. The advantages of this mechanical structure are its large transmission ratio, simple operation, and the ability to complete complex locking actions within a smaller rotation angle, which greatly simplifies the construction operation process and saves time and labor costs. The self-locking characteristics of the worm gear ensure that it is not easy to be accidentally loosened in the locked state, avoiding safety hazards caused by loose connections during the drilling process; secondly, when disassembling the two drill section bodies, only the worm gear needs to be rotated in the opposite direction to drive all C-arms to reset synchronously and release the clamping, without the need to disassemble them one by one or use cumbersome mechanical tools. This not only improves disassembly efficiency, but also reduces operation difficulty and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0012] Figure 2 Schematic diagram of the three-dimensional cross-sectional structure of the present invention Figure 1 ;

[0013] Figure 3 For the present invention Figure 2 A in the middle is an enlarged structural diagram;

[0014] Figure 4 Schematic diagram of the three-dimensional cross-sectional structure of the present invention Figure 2 ;

[0015] Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0016] Figure 6 It is a schematic diagram of the three-dimensional structure of the worm gear rotation locking structure of the present invention;

[0017] Figure 7 This is a schematic diagram of the three-dimensional structure of two drill segments in the docking state of the present invention;

[0018] Figure 8 It is a schematic diagram of the main cross-sectional structure of the two drill segment bodies of the present invention in the docking state.

[0019] In the figure: 1. Drill section body; 2. Upper connecting column; 201. Hollow cavity; 202. Rectangular hollow portion; 203. Fan-shaped protrusion; 204. Rectangular notch; 205. Rear slot; 3. Lower connecting column; 4. Lower sealing cover; 5. Worm gear rotation locking structure; 501. Worm shaft; 502. Hexagonal groove; 503. Worm gear disc; 6. C-mouth arm; 7. Gear transmission structure; 701. Side gear shaft; 702. Center gear ring. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-8The present invention provides an embodiment of a rotary positioning chuck mechanism for a pile driver, comprising a drill section body 1, an upper connecting column 2 and a lower connecting column 3 respectively fixed at the upper and lower ends of the drill section body 1, and a lower sealing cover 4 bolted and fixed to the bottom end of the lower connecting column 3. Four C-shaped arms 6 with equal spacing in a ring are rotatably mounted at the edge of the bottom end of the lower sealing cover 4. A gear transmission structure 7 for keeping the four C-shaped arms 6 in a synchronous rotation state is installed inside the lower connecting column 3. A worm gear rotation locking structure 5 for driving one of the C-shaped arms 6 to rotate is installed on one side of the interior of the lower connecting column 3. The upper connecting column 2 is used to be clamped with the four C-shaped arms 6 at the lower end of another drill section body 1.

[0022] The upper connecting column 2 has four hollow cavities 201 arranged in an annular pattern at equal intervals. A sector-shaped protrusion 203 is integrally formed on the inner wall of one side of the hollow cavity 201. A completely penetrating rectangular notch 204 is provided inside the sector-shaped protrusion 203.

[0023] The top of the upper connecting column 2 is provided with a rectangular hollow portion 202 which is interconnected with the hollow cavity 201, and the left and right outer walls of the fan-shaped protrusion 203 are both provided with rear slots 205. The C-mouth arm 6 enters the rectangular notch 204 of the fan-shaped protrusion 203 through the rectangular hollow portion 202. When the head and tail ends of the two drill segment bodies 1 are connected, the C-mouth arm 6 enters the hollow cavity 201 of the upper connecting column 2 through the rectangular hollow portion 202, and the C-mouth arm 6 enters the fan-shaped protrusion 203 through the rectangular notch 204. At this time, the C-mouth arm 6 and the fan-shaped protrusion 203 are in a plug-in state; the worm gear rotation locking structure 5 and the gear transmission structure 7 drive the C-mouth arm 6 to rotate, so that the C-mouth arm 6 rotates to the rear slot 205 of the fan-shaped protrusion 203. At this time, the C-mouth arm 6 and the fan-shaped protrusion 203 form a staggered clamping state, and the two drill segment bodies 1 cannot be separated;

[0024] The gear transmission structure 7 includes four side gear shafts 701 rotatably mounted on the inner edge of the lower connecting column 3 and a central gear ring 702 rotatably mounted on the inner center axis of the lower connecting column 3. The central gear ring 702 meshes with the four side gear shafts 701.

[0025] The bottom end of the side gear shaft 701 passes through the outside of the lower sealing cover 4 and is fixedly connected to the top of the C-mouth arm 6. The side gear shaft 701 drives the other side gear shafts 701 and the C-mouth arm 6 to rotate through the central gear ring 702. The stability and rigidity of the gear transmission make the locking force evenly distributed, reducing the risk of mechanical fatigue or damage caused by local uneven force. The worm gear rotation locking structure 5 includes a worm wheel disk 503 fixed to one end of the surface of one of the side gear shafts 701, a worm shaft 501 rotatably mounted on one side of the inner side of the lower connecting column 3, and a hexagonal groove 502 set at one end of the worm shaft 501. The worm shaft 501 and the worm wheel disk 503 are meshed with each other.

[0026] When one of the C-arms 6 is rotated through the worm gear rotation locking structure 5 and the gear transmission structure 7, the worm shaft 501 is rotated by cooperating with the hexagonal groove 502 at the end of the worm shaft 501 through the air cannon, and then the worm shaft 501 drives one of the side gear shafts 701 and the C-arm 6 to rotate through the worm gear disk 503. The self-locking characteristics of the worm shaft 501 and the worm gear disk 503 ensure that the C-arm 6 and the fan-shaped protrusion 203 are not easily loosened accidentally in the locked state, avoiding safety hazards caused by loose connections during drilling.

[0027] When using the embodiment of the present application, first align the head and tail ends of the two drill segment bodies 1 to be connected, ensuring that the four C-arms 6 at the lower end of one drill segment body 1 are aligned with the upper connecting column 2 at the upper end of the other drill segment body 1. At this time, the matching situation of the upper connecting column 2 and the C-arm 6 should be checked to ensure that there are no foreign objects or impurities hindering the insertion; insert the four C-arms 6 into the upper connecting column 2 one by one, and insert them slowly and evenly. Ensure that each C-arm 6 is fully inserted to avoid deviation or jamming. After the insertion is completed, one of the C-arms 6 is driven to rotate by the worm gear rotation locking structure 5, and the remaining C-arms 6 are driven synchronously by the gear transmission structure 7, and then the C-arms 6 are tightly clamped with the upper connecting column 2 to form a firm connection state; after completing the locking, the staff checks whether the connection between the two drill segment bodies 1 is firm, and confirms that all C-arms 6 are fully inserted and locked without looseness or deviation. If necessary, they can be gently shaken by hand to confirm the stability of the connection;

[0028] When disassembly is required, start the worm gear rotation locking structure 5 to rotate in the opposite direction, driving the gear transmission structure 7 to reset all C-arms 6 synchronously. This process should be carried out slowly to avoid mechanical shock or unbalanced loading. When all C-arms 6 are reset, confirm that the connection between the C-arm 6 and the upper connecting column 2 has been released, and the clamping state between the C-arm 6 and the upper connecting column 2 is broken. At this time, you can gently push or pull the end of the drill segment body 1 to cause the two drill segment bodies 1 to gradually separate until the two drill segment bodies 1 are completely separated.

Claims

1. The rotary positioning chuck mechanism of the pile driver is characterized by: The present invention comprises a drill section body (1), an upper connecting column (2) fixed at the upper and lower ends of the drill section body (1), a lower connecting column (3), and a lower sealing cover (4) bolted and fixed to the bottom end of the lower connecting column (3); four C-shaped arms (6) with equal spacing in an annular shape are rotatably mounted at the edge of the bottom end of the lower sealing cover (4); a gear transmission structure (7) for keeping the four C-shaped arms (6) in a synchronous rotation state is mounted inside the lower connecting column (3); a worm gear rotation locking structure (5) for driving one of the C-shaped arms (6) to rotate is mounted on one side of the interior of the lower connecting column (3); and the upper connecting column (2) is used for engaging with the four C-shaped arms (6) at the lower end of another drill section body (1).

2. The pile driver rotary positioning chuck mechanism according to claim 1, characterized in that: Four hollow cavities (201) are arranged in an annular manner at equal intervals inside the upper connecting column (2); a fan-shaped protrusion (203) is integrally formed on the inner wall of one side of the hollow cavity (201); and a completely penetrating rectangular notch (204) is arranged inside the fan-shaped protrusion (203).

3. The pile driver rotary positioning chuck mechanism according to claim 2, characterized in that: The top end of the upper connecting column (2) is provided with a rectangular hollow portion (202) that is interconnected with the hollow cavity (201); the left and right outer walls of the fan-shaped protrusion (203) are both provided with rear slots (205); and the C-mouth arm (6) enters the rectangular notch (204) of the fan-shaped protrusion (203) through the rectangular hollow portion (202).

4. The pile driver rotary positioning chuck mechanism according to claim 1, characterized in that: The gear transmission structure (7) comprises four side gear shafts (701) rotatably mounted at the inner edge of the lower connecting column (3) and a central gear ring (702) rotatably mounted at the inner center axis of the lower connecting column (3); the central gear ring (702) and the four side gear shafts (701) are meshed with each other.

5. The pile driver rotary positioning chuck mechanism according to claim 4, characterized in that: The bottom end of the side gear shaft (701) passes through the outside of the lower sealing cover (4) and is fixedly connected to the top end of the C-mouth arm (6).

6. The pile driver rotary positioning chuck mechanism according to claim 4, characterized in that: The worm gear rotation locking structure (5) comprises a worm wheel disc (503) fixed to one end of the surface of one of the side gear shafts (701), a worm shaft (501) rotatably mounted on one side of the interior of the lower connecting column (3), and a hexagonal groove (502) provided at one end of the worm shaft (501), wherein the worm shaft (501) and the worm wheel disc (503) are meshed with each other.

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