Rotary oil way of piling machine and piling machine

Abstract

The utility model discloses a piling machinery rotary oil way and piling machinery, which belong to the field of piling machinery and comprise an inner ring rotating body, an outer ring fixing body, an upper connecting flange, a lower connecting flange and a bearing. The outer ring fixing body is fixed, and the inner ring rotating body is sleeved with the outer ring fixing body and can rotate relative to the outer ring fixing body with the vertical direction as the axis. The bottom end of the upper connecting flange is connected with the top end of the inner ring rotating body, the top end of the upper connecting flange is used for being connected with a rotating power head, the top end of the lower connecting flange is connected with the bottom end of the inner ring rotating body, and the upper connecting flange, the lower connecting flange and the inner ring rotating body are fixed in the rotating direction of the inner ring rotating body. And the bearing is arranged among the outer ring fixing body, the inner ring rotating body, the upper connecting flange and the lower connecting flange. The concentricity between the inner ring rotating body and the outer ring fixing body is ensured, bonding abrasion caused by relative movement is avoided, the reliable sealing performance is ensured, the design mechanism and principle are simple, the performance is stable, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of pile driving machinery, in particular to a rotary oil circuit of a pile driving machinery and a pile driving machinery. Background Art

[0002] On excavators and pile driving machinery, a rotary joint is usually arranged on a drill tool. However, the concentricity between the rotary sleeve and the fixed sleeve of the existing rotary joint is poor, and adhesive wear is likely to occur, resulting in faults such as seal damage, hydraulic oil leakage, and system performance degradation. At the same time, its design and maintenance are relatively complex, increasing the complexity and cost of the system. Summary of the Utility Model

[0003] The utility model provides a rotary oil circuit of a pile driving machinery and a pile driving machinery, ensuring the concentricity between the inner ring rotating body and the outer ring fixed body, avoiding adhesive wear due to relative movement, ensuring reliable sealing performance, having a simple design mechanism and principle, stable performance, and reducing costs.

[0004] The technical solution provided by the utility model is as follows:

[0005] A rotary oil circuit of a pile driving machinery includes an inner ring rotating body, an outer ring fixed body, an upper connecting flange, a lower connecting flange, and a bearing, wherein:

[0006] The inner ring rotating body and the outer ring fixed body are of an annular structure. The outer ring fixed body is fixed, and the inner ring rotating body is sleeved inside the outer ring fixed body, and the inner ring rotating body can rotate relative to the outer ring fixed body with the vertical direction as the axis.

[0007] The bottom end of the upper connecting flange is connected to the top end of the inner ring rotating body. The top end of the upper connecting flange is used to connect the rotary power head of the pile driving machinery. The top end of the lower connecting flange is connected to the bottom end of the inner ring rotating body. The upper connecting flange and the lower connecting flange are fixed to the inner ring rotating body in the rotation direction of the inner ring rotating body.

[0008] The bearing is arranged between the outer ring fixed body and the inner ring rotating body, the upper connecting flange, and the lower connecting flange.

[0009] Further, at the position where the outer surface of the side wall of the inner ring rotating body contacts the inner surface of the side wall of the outer ring fixed body, at least two transverse annular oil guide grooves are formed on the outer surface of the side wall of the inner ring rotating body, and at least two vertical oil passage channels are formed inside the side wall of the inner ring rotating body. The oil passage channels are in one-to-one correspondence and communication with the annular oil guide grooves.

[0010] At least two transverse oil ports are formed at positions on the side wall of the outer ring fixed body opposite to the annular oil guiding groove. The oil ports penetrate the side wall of the outer ring fixed body transversely, and the oil ports are in one-to-one correspondence and communication with the annular oil guiding groove.

[0011] Furthermore, at least two transverse annular oil guiding grooves are arranged at intervals in the vertical direction. At least three annular rotary pressure sealing grooves are formed on the outer surface of the side wall of the inner ring rotating body. The rotary pressure sealing grooves are arranged above the uppermost annular oil guiding groove, below the lowermost annular oil guiding groove, and between adjacent annular oil guiding grooves. An oil path sealing element is arranged in the rotary pressure sealing groove.

[0012] Furthermore, the oil path passes downward through the bottom end of the side wall of the inner ring rotating body, and the bottom end of the oil path is communicated with the oil inlet pipe and the oil outlet pipe through an oil inlet element and an oil outlet element. The oil inlet pipe and the oil outlet pipe are respectively connected to the oil inlet of the hydraulic motor reel and the oil outlet.

[0013] Furthermore, an end face sealing element is arranged between the bearing and the inner ring rotating body. At the position where the outer surface of the side wall of the inner ring rotating body contacts the inner surface of the side wall of the outer ring fixed body, a wear-resistant element or an elastic element for compensating for machining errors is arranged between the inner ring rotating body and the outer ring fixed body.

[0014] Furthermore, rolling elements are arranged between the outer ring fixed body and the inner ring rotating body.

[0015] Furthermore, the number of the bearings and the rolling elements is two groups each. The two groups of bearings and rolling elements are symmetrically arranged in the vertical direction, and the rolling elements are located inside the bearings in the vertical direction.

[0016] Furthermore, one of the bottom end of the side wall of the upper connecting flange and the top end of the side wall of the inner ring rotating body is provided with a protruding first set of lugs, and the other is provided with a first set of grooves. The first set of lugs is embedded in the first set of grooves;

[0017] One of the top end of the side wall of the lower connecting flange and the bottom end of the side wall of the inner ring rotating body is provided with a protruding second set of lugs, and the other is provided with a second set of grooves. The second set of lugs is embedded in the second set of grooves, and a gap with a set height is left between the second set of lugs and the second set of grooves in the vertical direction.

[0018] Furthermore, the rotary oil circuit of the pile driving machinery further includes a slip ring, which includes a rotor and a stator. The rotor is fixed on the lower connecting flange, and the stator is fixed on the outer ring fixed body.

[0019] A pile driving machine, including a machine body and the rotary oil circuit of the pile driving machine, wherein:

[0020] A rotary power head is provided on the machine body. The rotary power head is connected to the upper connecting flange, and the outer ring fixed body is fixed on the machine body through a connecting carriage;

[0021] The rotary power head is connected to a drill pipe, and a drill bit is provided at the bottom end of the drill pipe.

[0022] Furthermore, the drill bit is an under-reaming drill bit. A sensor for monitoring the power execution element is provided on the power execution element of the under-reaming drill bit. The power supply line of the sensor is connected to the rotor of the slip ring. The sensor communicates with the ground visual monitoring device through a wireless network. The ground visual monitoring device displays the opening and closing states and data of the under-reaming drill bit in real time through a PLC.

[0023] The utility model has the following beneficial effects:

[0024] The rotary oil circuit of the pile driving machine of the utility model, by setting an inner ring rotating body, an outer ring fixed body, an upper connecting flange, a lower connecting flange and a bearing, and assembling them into an organic whole, ensures the concentricity between the inner ring rotating body and the outer ring fixed body, avoids adhesion and wear due to relative movement, ensures reliable sealing performance, has a simple design mechanism and principle, stable performance and reduced cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of an example of the rotary oil circuit of the pile driving machine of the utility model;

[0026] Figure 2 It is a schematic diagram of the pile driving machine of the utility model;

[0027] Figure 3 It is a schematic diagram of another example of the rotary oil circuit of the pile driving machine of the utility model;

[0028] Figure 4 It is a schematic diagram of yet another example of the rotary oil circuit of the pile driving machine of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the technical problems, technical solutions and advantages to be solved by the utility model clearer, the following will be described in detail with reference to the drawings and specific embodiments.

[0030] The utility model provides a rotary oil circuit 100 of a pile driving machine, as Figure 1 shown, including an inner ring rotating body 1, an outer ring fixed body 2, an upper connecting flange 3, a lower connecting flange 4 and a bearing 5, wherein:

[0031] Both the inner ring rotating body 1 and the outer ring fixed body 2 are in a similar circular ring structure, and their central axes are vertically arranged. The outer ring fixed body 2 is fixed and immovable, for example, fixedly connected to the mechanical main body 200 of the pile driving machinery, used to provide stable support for the inner ring rotating body 1 and related components, ensuring the stability of their positions and structures, making the equipment form a whole, and evenly distributing forces and loads on other components. The inner ring rotating body 1 is sleeved inside the outer ring fixed body 2, and the inner ring rotating body 1 can rotate relative to the outer ring fixed body 2 with the vertical direction as the axis.

[0032] The bottom end of the upper connecting flange 3 is connected to the top end of the inner ring rotating body 1. The top end of the upper connecting flange 3 is used to connect the rotating power head 300 of the pile driving machinery. The power of the inner ring rotating body 1 comes from the rotating power head of the pile driving machinery. The top end of the lower connecting flange 4 is connected to the bottom end of the inner ring rotating body 1. The upper connecting flange 3 and the lower connecting flange 4 are fixed to the inner ring rotating body in the rotating direction of the inner ring rotating body 1, that is, the upper connecting flange 3, the lower connecting flange 4, and the inner ring rotating body 1 rotate synchronously together.

[0033] The bearing 5 is arranged between the outer ring fixed body 2, the inner ring rotating body 1, the upper connecting flange 3, and the lower connecting flange 4.

[0034] The bearing 5 can be a bearing that can withstand large axial, radial, and overturning moments. The upper connecting flange 3 is used to realize the connection between the rotating power head of the pile driving machinery and the rotary oil circuit 100 of this pile driving machinery. The upper end of the upper connecting flange 3 is connected to the rotating power head, and the lower end is connected to the bearing 2 that can withstand large axial, radial, and overturning moments. The bearing 2 is used to connect the upper connecting flange 3, the lower connecting flange 4, the inner ring rotating body 1, and the outer ring fixed body 2, effectively transmitting torque and power, and enhancing the overall stiffness and anti-deformation ability of the equipment.

[0035] The rotary oil circuit of the pile driving machinery of the present utility model, by arranging the inner ring rotating body, the outer ring fixed body, the upper connecting flange, the lower connecting flange, and the bearing, and organically assembling them into a whole, ensures the concentricity between the inner ring rotating body and the outer ring fixed body, avoids adhesion and wear due to relative movement, ensures reliable sealing performance, has a simple design mechanism and principle, stable performance, and reduces costs.

[0036] As an improvement of the present utility model, to realize the conversion from a static oil circuit to a moving oil circuit, at the position where the outer surface of the side wall of the inner ring rotating body 1 contacts the inner surface of the side wall of the outer ring fixed body 2, at least two transverse annular oil guide grooves 6 are provided on the outer surface of the side wall of the inner ring rotating body 1, and at least two vertical oil passage channels 7 are provided inside the side wall of the inner ring rotating body 1. The oil passage channels 7 are in one-to-one correspondence and communication with the annular oil guide grooves 6.

[0037] At least two transverse oil ports 8 are provided at positions on the side wall of the outer ring fixing body 2 opposite to the annular oil guiding groove 6. The oil ports 8 are divided into an oil inlet 9 and an oil outlet 10. The oil ports 8 penetrate the side wall of the outer ring fixing body 2 transversely, and the oil ports 8 are in one-to-one correspondence and communication with the annular oil guiding groove 6.

[0038] In the utility model, the oil circuit of the stationary part of the outer ring fixing body 2 is converted into a dynamic oil circuit that rotates with the power head through the oil ports 8, the annular oil guiding groove 6, and the oil circuit passage 7. During operation, the hydraulic oil pump of the hydraulic system of the rotary drilling rig sucks the hydraulic oil from the fuel tank, and after being filtered by the filter, it enters the control valve group. The control valve group adjusts the oil flow direction and flow rate according to the operation instructions, so that the oil enters the rotary oil circuit of the pile driving machinery of the utility model (specifically, first through the annular oil guiding groove 6 on the outer ring fixing body 2, then enters the annular oil guiding groove 6 and the oil circuit passage 7, and finally enters the pipeline). The power head of the rotary drilling rig drives the rotary oil circuit 100 of the pile driving machinery to rotate to complete the rotary action. The oil fluid circulates in the rotary oil circuit of the pile driving machinery, and finally returns to the fuel tank through the oil return pipeline and the oil return port to ensure the stability of the conversion of the rotary oil circuit.

[0039] Specifically, at least two transverse annular oil guiding grooves 6 are arranged at intervals in the up-down direction. At least three annular rotary pressure sealing grooves 11 are provided on the outer surface of the side wall of the inner ring rotating body 1. The rotary pressure sealing grooves 11 are arranged transversely, and the number is one more than that of the annular oil guiding grooves 6. The rotary pressure sealing grooves 11 are arranged above the uppermost annular oil guiding groove, below the lowermost annular oil guiding groove, and between adjacent annular oil guiding grooves. An oil circuit sealing element 12 is arranged in the rotary pressure sealing grooves 11.

[0040] The oil circuit sealing element 12 is used for contact rotary pressure sealing on the contact surfaces of the inner ring rotating body 1 and the cavity surface of the outer ring fixing body 2. It utilizes the elasticity of the sealing material to adapt to the rotation and vibration of the inner ring, and relies on the internal and external pressure difference of the hydraulic oil to be in close contact to form an effective seal to prevent the leakage of the hydraulic oil during the rotation process.

[0041] The aforementioned oil circuit passage 7 passes downward through the bottom end of the side wall of the inner ring rotating body 1, and the bottom end of the oil circuit passage 7 is communicated with the oil inlet pipe 15 and the oil outlet pipe 16 through the oil inlet element 13 and the oil outlet element 14. The oil inlet pipe 15 and the oil outlet pipe 16 are respectively connected to the oil inlets and outlets of the hydraulic motor reels 17 and 18.

[0042] A face seal element 19 is arranged between the bearing 5 and the inner ring rotating body 1, and the face seal element 19 functions to prevent dust.

[0043] At the position where the outer surface of the side wall of the inner ring rotating body 1 contacts the inner surface of the side wall of the outer ring fixed body 2, a wear-resistant element or elastic element 20 for compensating for machining errors is provided between the inner ring rotating body 1 and the outer ring fixed body 2. It is used to compensate for the machining errors of the inner ring rotating body 1 and the outer ring fixed body 2, improve the stability and reliability of the device, and extend the service life.

[0044] As another improvement of the present utility model, rolling elements 21 are provided between the aforementioned outer ring fixed body 2 and the inner ring rotating body 1. The outer ring fixed body 2 is a fixed support, and together with a bearing 5 that bears the lateral tension and the rolling elements 21, a rotating body is formed with the inner ring rotating body. The rolling elements 21 bear the radial loads and stability of the inner ring rotating body 1 and the outer ring fixed body 2, further maintaining the concentricity of the inner ring rotating body 1 and the outer ring fixed body 2, thereby ensuring the rotation accuracy of the inner ring rotating body 1. And the rolling elements 21 can also ensure the extrusion deformation of the wear-resistant element or elastic element 20, the oil path sealing element 12, and the inner ring rotating body 1.

[0045] Specifically, the number of the bearings 5 and the rolling elements 21 is two groups each. The two groups of bearings 2 and the rolling elements 21 are symmetrically arranged in the up and down directions, and the rolling elements 21 are located inside the bearings 5 in the up and down directions.

[0046] In some other examples, the rolling elements 21 may not be included, as shown in Figure 3 、 4 shown. In some other examples, the number of the bearings 5 may not be symmetrically arranged up and down, as shown in Figure 4 shown.

[0047] To ensure the torque transmission between the upper connecting flange 3, the inner ring rotating body 1, and the lower connecting flange 4, on one of the bottom end of the side wall of the upper connecting flange 3 and the top end of the side wall of the inner ring rotating body 1, a protruding first set of lugs 22 is provided, and on the other, a first set of grooves 23 is provided. The first set of lugs 22 is embedded in the first set of grooves 23.

[0048] The number of the first set of lugs 22 and the first set of grooves 23 is not less than two each, and they are embedded in one-to-one correspondence to transmit the rotational power and torque.

[0049] On one of the top end of the side wall of the lower connecting flange 4 and the bottom end of the side wall of the inner ring rotating body 1, a protruding second set of lugs 24 is provided, and on the other, a second set of grooves 25 is provided. The second set of lugs 24 is embedded in the second set of grooves 25.

[0050] The number of the second set of shifting blocks 24 and the second set of grooves 25 is not less than two each, and they are inlaid in one-to-one correspondence to transmit rotational power and torque. Moreover, a gap with a set height is left between the second set of shifting blocks 24 and the second set of grooves 25 in the up-and-down direction to ensure the rotational pressure sealing accuracy, offset deformation when contacting the pile driving machinery, effectively transmit torque and power, and realize the conversion of the system oil circuit.

[0051] In some other examples, the lower connecting flange 4 and the inner ring rotating body 1 are not connected through the second set of shifting blocks 24 and the second set of grooves 25, but through bolts 27, as Figure 4 shown.

[0052] The rotary oil circuit 100 of the pile driving machinery of the present utility model may further include a slip ring 26, also called a conductive ring or a rotary joint, which is used to transmit signals and current. The slip ring is composed of a conductive ring, a brush, and insulating materials, and can maintain good electrical conductivity while rotating. The slip ring 26 includes a rotor and a stator. The stator is fixed on the outer ring fixed body 2, and the outer ring fixed body 2 provides stable support for the slip ring. The rotor is fixed on the lower connecting flange 4, and the rotor of the slip ring 26 rotates with the inner ring rotating body 1.

[0053] The power head of the rotary drilling rig drives the rotary oil circuit 100 of the pile driving machinery to rotate, completes the rotary motion and rotates together with the rotor of the slip ring, and realizes the conversion between the stationary power supply or electrical signal and the rotary power supply or electrical signal.

[0054] As can be seen from the above, the rotary oil circuit 100 of the pile driving machinery of the present utility model solves the problem of rotary high-pressure rotary sealing of the rotary oil circuit (especially the large-diameter oil circuit), realizes the rotary conversion from the stationary oil supply system and electrical signal to the rotary oil supply system and electrical signal system, has a compact structure, and is easy to install and disassemble.

[0055] The present utility model also provides a pile driving machinery, as Figure 2 shown, which includes a mechanical main body 200 and the aforementioned rotary oil circuit 100 of the pile driving machinery, wherein:

[0056] A rotary power head 300 is arranged on the mechanical main body 200. The rotary power head 300 is connected to the upper connecting flange 3, and the outer ring fixed body 2 is fixed on the mechanical main body 200 through a connecting carriage 400.

[0057] The connecting carriage 400 is provided with a main power line 401, an oil inlet pipe 402, an oil return pipe 403, etc. The main power line 401 is connected to the stator of the slip ring 26, and the oil inlet pipe 402 and the oil return pipe 403 are respectively connected to the oil inlet 9 and the oil outlet 10.

[0058] The rotary power head 300 is connected to a drill pipe 500, and a drill bit 600 is arranged at the bottom end of the drill pipe 500.

[0059] As a preferred embodiment, drill bit 600 is a bottom expansion drill bit, which is a drill bit used for constructing bottom expansion piles during rotary drilling. It is generally composed of bottom expansion wings, a pressure frame, a connecting rod, a base and a pin shaft. The bottom expansion wings have two wings, three wings or four wings. When the bottom expansion is required, the bottom expansion wings are gradually opened to cut the hole wall to expand the bottom.

[0060] During the use of the bottom enlarging drill, it is necessary to monitor the opening range of the bottom enlarging wing of the bottom enlarging drill to determine the diameter of the hole. To achieve this purpose, the utility model sets a sensor for monitoring the power actuator on the power actuator of the bottom enlarging drill, and the power line of the sensor is connected to the rotor of the collector ring for power supply and full monitoring.

[0061] The sensor may be a displacement sensor, which directly monitors the horizontal or vertical displacement of the bottom enlarging drill bit, or a hydraulic oil flow sensor, which obtains the displacement of the bottom enlarging drill bit by monitoring the hydraulic oil flow.

[0062] During the monitoring process, the monitoring results are communicated to the ground visualization monitoring equipment through the wireless network. After receiving the monitoring results, the ground visualization monitoring equipment generates virtual images or data in real time through PLC to display the opening and closing status of the bottom expansion drill bit according to the bottom expansion drill bit stroke.

[0063] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A rotary oil circuit of a pile driving machine, characterized in that: It includes an inner ring rotating body, an outer ring fixed body, an upper connecting flange, a lower connecting flange and a bearing, wherein: The inner ring rotating body and the outer ring fixed body are annular structures, the outer ring fixed body is fixed, the inner ring rotating body is sleeved in the outer ring fixed body, and the inner ring rotating body can rotate relative to the outer ring fixed body with the vertical direction as the axis; The bottom end of the upper connecting flange is connected to the top end of the inner ring rotating body, the top end of the upper connecting flange is used to connect the rotating power head of the pile driving machinery, the top end of the lower connecting flange is connected to the bottom end of the inner ring rotating body, and the upper connecting flange and the lower connecting flange are fixed to the inner ring rotating body in the rotation direction of the inner ring rotating body; The bearing is arranged between the outer ring fixing body and the inner ring rotating body, the upper connecting flange and the lower connecting flange.

2. The rotary oil circuit of the pile driving machinery according to claim 1, characterized in that: The pile-driving machine rotary oil circuit also includes a collector ring, which includes a rotor and a stator. The rotor is fixed on the lower connecting flange, and the stator is fixed on the outer ring fixing body.

3. The rotary oil circuit of the pile driving machinery according to claim 2, characterized in that: At a position where the outer surface of the side wall of the inner ring rotating body contacts the inner surface of the side wall of the outer ring fixed body, at least two transverse annular oil guide grooves are provided on the outer surface of the side wall of the inner ring rotating body, and at least two vertical oil passages are provided in the side wall of the inner ring rotating body, and the oil passages are connected to the annular oil guide grooves in a one-to-one correspondence; At least two transverse oil passages are provided on the side wall of the outer ring fixing body at positions directly opposite to the annular oil guide groove. The oil passages pass through the side wall of the outer ring fixing body in a transverse direction, and the oil passages are connected to the annular oil guide groove in a one-to-one correspondence.

4. The rotary oil circuit of the pile driving machinery according to claim 3, characterized in that: At least two transverse annular oil guide grooves are spaced apart in the up and down directions, and at least three annular rotary pressure sealing grooves are opened on the outer surface of the side wall of the inner ring rotating body. The rotary pressure sealing grooves are arranged above the uppermost annular oil guide groove, below the lowermost annular oil guide groove and between adjacent annular oil guide grooves, and oil circuit sealing elements are arranged in the rotary pressure sealing grooves.

5. The rotary oil circuit of the pile driving machinery according to claim 4, characterized in that: The oil passage passes downward through the bottom end of the side wall of the inner ring rotating body, and the bottom end of the oil passage is connected to the oil inlet pipe and the oil outlet pipe through the oil inlet element and the oil outlet element, and the oil inlet pipe and the oil outlet pipe are respectively connected to the oil inlet and the oil outlet of the hydraulic motor reel.

6. The rotary oil circuit of the pile driving machine according to claim 5, characterized in that: An end face sealing element is arranged between the bearing and the inner ring rotating body, and a wear-resistant element or elastic element for compensating for processing errors is arranged between the inner ring rotating body and the outer ring fixed body at the position where the outer surface of the side wall of the inner ring rotating body contacts the inner surface of the side wall of the outer ring fixed body.

7. The rotary oil circuit of the pile driving machine according to claim 6, characterized in that: A rolling body is arranged between the outer ring fixed body and the inner ring rotating body.

8. The rotary oil circuit of the pile driving machine according to claim 7, characterized in that: The number of the bearings and rolling bodies is two groups respectively, the two groups of bearings and rolling bodies are symmetrically arranged in the up-down direction, and the rolling bodies are located on the inner side of the bearings in the up-down direction.

9. The rotary oil circuit of the pile driving machinery according to any one of claims 1 to 8, characterized in that: A first group of protruding shifting blocks is provided on one of the bottom end of the side wall of the upper connecting flange and the top end of the side wall of the inner ring rotating body, and a first group of grooves is provided on the other, and the first group of shifting blocks is embedded in the first group of grooves; A protruding second group of shift blocks is provided on one of the top end of the side wall of the lower connecting flange and the bottom end of the side wall of the inner ring rotating body, and a second group of grooves is provided on the other one. The second group of shift blocks are embedded in the second group of grooves, and a gap of a set height is left between the second group of shift blocks and the second group of grooves in the up and down directions.

10. A pile driving machine, characterized in that: It comprises a mechanical body and a rotary oil circuit of a pile driving machine as claimed in any one of claims 2 to 9, wherein: The mechanical body is provided with a rotary power head, the rotary power head is connected to the upper connecting flange, and the outer ring fixing body is fixed to the mechanical body through a connecting slide; The rotary power head is connected to a drill rod, and a drill bit is arranged at the bottom end of the drill rod.

11. The pile driving machine according to claim 9, characterized in that: The drill bit is a bottom-enlarging drill bit, and the power actuator of the bottom-enlarging drill bit is provided with a sensor for monitoring the power actuator, the power line of the sensor is connected to the rotor of the collector ring, the sensor communicates with the ground visualization monitoring equipment through a wireless network, and the ground visualization monitoring equipment displays the opening and closing status and data display of the bottom-enlarging drill bit in real time through PLC.

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