Drilling device for bridge pile foundation construction

Abstract

The utility model relates to the technical field of building construction, in particular to a drilling device for bridge pile foundation construction. The drilling device for bridge pile foundation construction comprises a moving trolley, a drill bit switching mechanism, at least two drill bits and a lifting mechanism. A mounting frame is arranged on the moving vehicle. One end of the electric telescopic rod is connected with the mounting frame, the other end of the electric telescopic rod is connected with the connecting frame, the first driving assembly is arranged on the connecting frame, the driving end of the first driving assembly penetrates through the connecting frame to be connected with the rotating disc, and the first driving assembly is configured to drive the rotating disc to rotate. The at least two drill bits are detachably arranged on the rotating disc. The lifting plate is slidably connected with the mounting frame, the second driving assembly and the third driving assembly are both arranged on the lifting plate, the driving end of the second driving assembly is in driving connection with one end of the connecting rod, and the other end of the connecting rod is detachably connected with a drill bit. The drilling device for bridge pile foundation construction can improve the construction efficiency and save the cost.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a drilling device for bridge pile foundation construction. Background Technology

[0002] During the construction of bridge pile foundations, the quality of the pile foundation construction directly affects the stability and safety of the overall bridge structure. Currently, depending on different geological conditions and bridge design requirements, pile foundation construction typically requires sequential completion of processes such as rotary drilling, impact drilling, and manual hole finishing.

[0003] Current technologies require the separate use of rotary drilling rigs and impact drilling rigs for construction. Specifically, after the rotary drilling rig completes its drilling operation, the construction personnel must first remove the entire rotary drilling rig from the drilling area before reinstalling the impact drilling rig for subsequent drilling operations. However, the removal of the rotary drilling rig and the reinstallation of the impact drilling rig consume a significant amount of time, reducing construction efficiency, affecting the construction schedule, and increasing the pressure on the project's construction cycle.

[0004] Therefore, there is an urgent need to design a drilling device for bridge pile foundation construction to solve the above technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a drilling device for bridge pile foundation construction, which can improve construction efficiency and save costs.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a drilling device for bridge pile foundation construction, comprising:

[0008] A mobile vehicle, on which a mounting frame is provided;

[0009] A drill bit switching mechanism includes an electric telescopic rod, a connecting frame, a first drive assembly, and a rotary disk. One end of the electric telescopic rod is connected to the mounting frame, and the other end is connected to the connecting frame. The first drive assembly is disposed on the connecting frame, and the drive end of the first drive assembly passes through the connecting frame and is connected to the rotary disk. The first drive assembly is configured to drive the rotary disk to rotate.

[0010] At least two drill bits, and at least two of the drill bits are detachably mounted on the rotary disk;

[0011] The lifting mechanism includes a lifting plate, a connecting rod, a second drive assembly, and a third drive assembly. The lifting plate is slidably connected to the mounting frame. Both the second drive assembly and the third drive assembly are disposed on the lifting plate. The driving end of the second drive assembly is drivenly connected to one end of the connecting rod, and the other end of the connecting rod is detachably connected to the drill bit. The second drive assembly can drive the connecting rod to rotate the drill bit, and the third drive assembly can apply pressure to the drill bit.

[0012] As an optional technical solution for drilling devices used in bridge pile foundation construction, the drill bit switching mechanism further includes a locking component, which is disposed on the rotary disk. A locking groove is provided on the peripheral sidewall of the drill bit, and the locking component can be locked into the locking groove.

[0013] As an optional technical solution for a drilling device used in bridge pile foundation construction, the snap-fit ​​assembly includes a first electromagnet, an elastic element, and a first magnetic element. One end of the elastic element is connected to the first electromagnet, and the other end of the elastic element is connected to the first magnetic element. The first electromagnet is disposed on the rotating disk.

[0014] When the first electromagnet is de-energized, the first magnetic component can be engaged in the slot.

[0015] When the first electromagnet is energized, the first magnetic component can disengage from the slot.

[0016] As an optional technical solution for drilling equipment used in bridge pile foundation construction, the mounting frame is equipped with a slide rail, and the lifting plate is slidably connected to the slide rail.

[0017] As an optional technical solution for a drilling device for bridge pile foundation construction, the connecting rod includes a first connecting rod and a second connecting rod. The top of the first connecting rod is driven to the output end of the second driving component, and a second electromagnet is provided at the bottom of the first connecting rod. A second magnetic element is provided at the top of the second connecting rod, and the bottom of the second connecting rod is detachably connected to the drill bit. The second electromagnet is magnetically connected to the second magnetic element. The output end of the second driving component can drive the first connecting rod to rotate, thereby driving the second connecting rod and the drill bit to rotate.

[0018] As an optional technical solution for a drilling device for bridge pile foundation construction, the second drive assembly further includes a timing belt, one end of which is sleeved on the output end of the second drive assembly, and the other end of which is sleeved on the top of the first connecting rod; the output end of the second drive assembly drives the first connecting rod to rotate through the timing belt.

[0019] As an optional technical solution for a drilling device for bridge pile foundation construction, the drilling device for bridge pile foundation construction further includes a connecting plate and a limiting ring. The connecting plate is located on one side of the drill bit and is connected to the mounting frame. One end of the limiting ring is slidably connected to the connecting plate, and the other end of the limiting ring is sleeved on the second connecting rod.

[0020] As an optional technical solution for drilling devices used in bridge pile foundation construction, the bottom of the second connecting rod is provided with an external thread, and the drill bit is provided with an internal thread, with the external thread and the internal thread being threadedly connected.

[0021] As an optional technical solution for a drilling device used in bridge pile foundation construction, the lifting mechanism further includes a counterweight, a bent rod, and a cam. The counterweight is sleeved on the second connecting rod, one end of the bent rod is connected to the counterweight, one end of the cam is connected to the output end of the third drive assembly, and the other end of the cam is used to push the bent rod. The third drive assembly drives the cam to rotate, and the cam can push the bent rod and drive the counterweight to move up and down.

[0022] As an optional technical solution for drilling equipment used in bridge pile foundation construction, the drill bit includes rotary drilling bit and impact drilling bit.

[0023] The beneficial effects of this utility model include at least the following:

[0024] This utility model provides a drilling device for bridge pile foundation construction. The device includes a mobile vehicle, a drill bit switching mechanism, at least two drill bits, and a lifting mechanism. The mobile vehicle is equipped with a mounting frame. The drill bit switching mechanism includes an electric telescopic rod, a connecting frame, a first drive assembly, and a rotating disk. One end of the electric telescopic rod is connected to the mounting frame, and the other end is connected to the connecting frame. The first drive assembly is mounted on the connecting frame, and its drive end passes through the connecting frame and connects to the rotating disk. The first drive assembly is configured to drive the rotating disk to rotate. At least two drill bits are detachably mounted on the rotating disk. The lifting mechanism includes a lifting plate, a connecting rod, a second drive assembly, and a third drive assembly. The lifting plate is slidably connected to the mounting frame. Both the second and third drive assemblies are mounted on the lifting plate. The drive end of the second drive assembly is driven to one end of the connecting rod, and the other end of the connecting rod is detachably connected to the drill bit. The second drive assembly drives the connecting rod to rotate the drill bit, and the third drive assembly applies pressure to the drill bit.

[0025] As described above, by controlling the extension and retraction of the electric telescopic rod and the rotation of the first drive component, different drill bits on the rotary table can be easily moved to the working position, thus achieving rapid drill bit switching. Different drill bits are aligned with the working position, and then the connecting rod of the lifting mechanism connects the drill bits for operation, shortening drill bit replacement time and improving construction efficiency. Compared to existing technologies that require the entire equipment to be removed and reinstalled, this drilling device for bridge pile foundation construction significantly reduces the time and labor costs required for drill bit replacement, effectively improving construction efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the drilling device for bridge pile foundation construction provided in this embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the drilling device for bridge pile foundation construction (the moving vehicle and part of the drill bit switching structure are not shown) provided in this embodiment of the utility model.

[0029] Figure 3 This is a schematic diagram of the assembled drill bit and rotary disk provided in this embodiment of the utility model;

[0030] Figure 4 This is a cross-sectional view of the snap-fit ​​assembly provided in this embodiment of the utility model.

[0031] Figure Labels

[0032] 10. Mobile vehicle; 11. Mounting rack;

[0033] 20. Drill bit switching mechanism; 21. Electric telescopic rod; 22. Connecting frame; 23. First drive assembly; 24. Rotary disk; 25. Snap-fit ​​assembly; 251. First electromagnet; 252. Elastic element; 253. First magnetic element;

[0034] 30. Lifting mechanism; 31. Lifting plate; 32. Connecting rod; 321. First connecting rod; 322. Second connecting rod; 323. Second electromagnet; 324. Second magnetic component; 325. External thread; 33. Second drive assembly; 331. Synchronous belt; 34. Third drive assembly; 35. Counterweight; 36. Bending rod; 37. Cam;

[0035] 40. Connecting plate; 41. Limiting ring;

[0036] 50. Rotary drilling bit; 51. Slot; 52. Internal thread; 60. Impact drill bit. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0044] This embodiment provides a drilling device for bridge pile foundation construction, which can improve construction efficiency and save costs.

[0045] like Figures 1-3 As shown, the drilling device for bridge pile foundation construction mainly includes a mobile vehicle 10, a drill bit switching mechanism 20, at least two drill bits, and a lifting mechanism 30. The mobile vehicle 10 is equipped with a mounting frame 11. The drill bit switching mechanism 20 includes an electric telescopic rod 21, a connecting frame 22, a first drive assembly 23, and a rotating disk 24. One end of the electric telescopic rod 21 is connected to the mounting frame 11, and the other end is connected to the connecting frame 22. The first drive assembly 23 is mounted on the connecting frame 22, and its drive end passes through the connecting frame 22 and connects to the rotating disk 24. The first drive assembly 23 is configured to drive the rotating disk 24 to rotate. At least two drill bits are detachably mounted on the rotating disk 24. The lifting mechanism 30 includes a lifting plate 31, a connecting rod 32, a second drive assembly 33, and a third drive assembly 34. The lifting plate 31 is slidably connected to the mounting frame 11. The second drive assembly 33 and the third drive assembly 34 are both mounted on the lifting plate 31. The driving end of the second drive assembly 33 is drivenly connected to one end of the connecting rod 32, and the other end of the connecting rod 32 is used for detachable connection with the drill bit. The second drive assembly 33 can drive the connecting rod 32 to rotate the drill bit, and the third drive assembly 34 can apply pressure to the drill bit.

[0046] Based on the above design, in this embodiment, by controlling the extension and retraction of the electric telescopic rod 21 and the rotation of the first drive component 23, different drill bits on the rotary disk 24 can be conveniently moved to the working position (i.e., the bottom of the connecting rod 32), thereby achieving rapid drill bit switching. Different drill bits are aligned with the working position, and then the connecting rod 32 of the lifting mechanism 30 connects the drill bits for operation, shortening drill bit replacement time and improving construction efficiency. Compared to the prior art which requires removing and reinstalling the entire equipment, this drilling device for bridge pile foundation construction significantly reduces the time and labor costs required for drill bit replacement, effectively improving construction efficiency.

[0047] Furthermore, the drilling device for bridge pile foundation construction is equipped with at least two drill bits, detachably mounted on the rotary table 24. The drill bit switching mechanism 20 can quickly move different drill bits to the working position. Simultaneously, the second drive component 33 in the lifting mechanism 30 can drive one of the drill bits to rotate, and the third drive component 34 can apply pressure to the other drill bit, thereby achieving the purpose of one drill bit rotary drilling and the other drill bit impact drilling. This meets the construction needs of different geological conditions, with multiple drill bits performing their respective functions and cooperating with each other to carry out construction, further improving construction efficiency and saving costs.

[0048] The drilling device for bridge pile foundation construction integrates a drill bit switching mechanism 20, a lifting mechanism 30, and at least two drill bits onto a mobile vehicle 10. The overall structure is compact, highly integrated, space-saving, and rationally laid out. The mobile vehicle 10 serves as a load-bearing foundation, allowing for flexible movement on the construction site, facilitating equipment transport and installation.

[0049] For example, the first drive component 23, the second drive component 33 and the third drive component 34 in this embodiment can all be configured as motors.

[0050] For example, the drill bit in this embodiment includes a rotary drilling bit 50 and an impact drilling bit 60. This allows the drilling device for bridge pile foundation construction to switch between rotary drilling and impact drilling methods on the same set of equipment, meeting the drilling method requirements of different procedures in bridge pile foundation construction, avoiding the trouble of frequent equipment changes, greatly saving construction time and costs, and improving construction efficiency.

[0051] In some alternative implementations, the rotary drilling bit 50 uses wear-resistant materials such as carbide or diamond cutting tips, and the shape and size of the cutting tips are designed according to different geological conditions and pile diameters, such as spiral or cross shapes; the head of the impact drill bit 60 can be configured as a spherical or conical structure to adapt to different rock crushing requirements.

[0052] In addition, in some alternative embodiments, structures such as coolant nozzles or slag discharge grooves can be provided on the surface of the drill bit to facilitate cooling and slag removal during drilling, thereby improving drilling efficiency and quality.

[0053] like Figures 3-4 As shown, the drill bit switching mechanism 20 in this embodiment also includes a locking component 25, which is disposed on the rotary disk 24. A slot 51 is provided on the peripheral sidewall of the drill bit, and the locking component 25 can be locked into the slot 51. The locking component 25 can fix the drill bit on the rotary disk 24, preventing the drill bit from rotating relative to the rotary disk 24, and improving the stability and reliability of the drill bit assembly.

[0054] For details, please refer to [link / reference]. Figures 3-4 In this embodiment, the snap-fit ​​assembly 25 includes a first electromagnet 251, an elastic element 252, and a first magnetic element 253. One end of the elastic element 252 is connected to the first electromagnet 251, and the other end of the elastic element 252 is connected to the first magnetic element 253. The first electromagnet 251 is disposed on the rotating disk 24. When the first electromagnet 251 is de-energized, the first magnetic element 253 can snap into the slot 51. When the first electromagnet 251 is energized, the first magnetic element 253 can release from the slot 51.

[0055] The electromagnetically controlled locking assembly 25 utilizes the cooperation of the elastic element 252 and the first magnetic element 253 to achieve automatic locking and releasing of the drill bit and the rotary disk 24. When power is off, the elastic element 252 rebounds under its elastic force, pushing the first magnetic element 253 into the slot 51. At this time, the drill bit and the rotary disk 24 are relatively fixed. During the movement of the rotary disk 24 closer to the working position driven by the electric telescopic rod 21, the drill bit's rotation or positional deviation is prevented, improving the reliability and efficiency of the assembly between the drill bit and the connecting rod 32. When power is on, the first electromagnet 251 generates magnetic force to attract the first magnetic element 253, compressing the elastic element 252 and releasing the locking mechanism. At this time, the electric telescopic rod 21 can drive the connecting frame 22 and the rotary disk 24 out of the working position. Thus, when the drill bit connected to the connecting rod 32 is performing construction work, interference from the rotary disk 24 with the working drill bit is avoided.

[0056] It should be noted that in this embodiment, there are multiple snap-fit ​​components 25, and each drill bit is equipped with at least one snap-fit ​​component 25.

[0057] In this embodiment, a slide rail (not shown in the figure) is provided on the mounting bracket 11, and the lifting plate 31 is slidably connected to the slide rail. Specifically, the lifting plate 31 is provided with a slider that matches the slide rail, which provides a stable guide for the lifting movement of the lifting plate 31, ensuring the smoothness and accuracy of the lifting mechanism 30 in the process of driving the drill bit to move up and down. This helps to improve the verticality and quality of the drilling and avoid problems such as drill bit swaying caused by unstable lifting.

[0058] like Figures 1-2 As shown, in this embodiment, the connecting rod 32 includes a first connecting rod 321 and a second connecting rod 322. The top of the first connecting rod 321 is driven to be connected to the output end of the second driving assembly 33, and a second electromagnet 323 is provided at the bottom of the first connecting rod 321. A second magnetic element 324 is provided at the top of the second connecting rod 322, and the bottom of the second connecting rod 322 is detachably connected to the drill bit. The second electromagnet 323 and the second magnetic element 324 are magnetically attracted to each other. The output end of the second driving assembly 33 can drive the first connecting rod 321 to rotate and drive the second connecting rod 322 and the drill bit to rotate.

[0059] Specifically, when the rotary drill bit 50 is connected to the second connecting rod 322, the second electromagnet 323 is energized, causing it to magnetically connect with the second magnetic component 324. The strong magnetic attraction (typically ≥5kN) ensures a tight connection between the first connecting rod 321 and the second connecting rod 322, guaranteeing efficient torque transmission. The second drive assembly 33 drives the first connecting rod 321 to rotate, which in turn causes the second connecting rod 322 to drive the rotary drill bit 50 to work. Simultaneously, the lifting plate 31 slowly descends, thus realizing the rotary drilling construction process.

[0060] In some optional embodiments, the second electromagnet 323 is provided with a toothed groove, and the second magnetic element 324 is provided with teeth. The teeth and the toothed groove cooperate with each other to magnetically attract each other, thereby improving the stability and reliability of the connection between the second electromagnet 323 and the second magnetic element 324 and avoiding the phenomenon of circumferential slippage between the second electromagnet 323 and the second magnetic element 324.

[0061] like Figures 2-3 As shown, in this embodiment, the bottom of the second connecting rod 322 is provided with an external thread 325, and the drill bit is provided with an internal thread 52. The external thread 325 and the internal thread 52 are threadedly connected. Through the cooperation of the external thread 325 and the internal thread 52, a detachable connection between the drill bit and the second connecting rod 322 is achieved. The threaded connection has the advantages of simple structure, reliable connection, and convenient assembly and disassembly. It can quickly replace the drill bit to adapt to different geological conditions and construction requirements, improve the versatility and flexibility of the drilling device for bridge pile foundation construction, and also facilitate the maintenance and replacement of the drill bit, reducing the cost of use.

[0062] In some alternative embodiments, an anti-rotation component may be provided at the end where the drill bit and the second connecting rod 322 are connected. For example, a mating plane or keyway may be provided on the second connecting rod 322 and the drill bit to prevent the drill bit from rotating relative to the second connecting rod 322 during rotation, thereby ensuring stable rotary drilling or impact operation of the drill bit.

[0063] like Figures 1-2 As shown, in this embodiment, the second drive assembly 33 further includes a timing belt 331. One end of the timing belt 331 is sleeved on the output end of the second drive assembly 33, and the other end is sleeved on the top of the first connecting rod 321. The output end of the second drive assembly 33 drives the first connecting rod 321 to rotate via the timing belt 331. Connecting the output end of the second drive assembly 33 to the top of the first connecting rod 321 via the timing belt 331 provides advantages such as smooth transmission, low noise, and compact structure. It effectively transmits the power of the second drive assembly 33 to the first connecting rod 321, thereby driving the drill bit to rotate, improving the stability and reliability of drilling operations. It also benefits the overall layout and space utilization of the drilling device used for bridge pile foundation construction.

[0064] For example, the width and type of the timing belt 331 can be selected according to the magnitude of the transmitted torque to ensure sufficient load-bearing capacity and transmission efficiency; the material of the timing belt 331 pulley is made of high-strength aluminum alloy or engineering plastics, which have good wear resistance and fatigue resistance.

[0065] like Figures 1-2 As shown, in this embodiment, the drilling device for bridge pile foundation construction also includes a connecting plate 40 and a limiting ring 41. The connecting plate 40 is located on one side of the drill bit and is connected to the mounting frame 11. One end of the limiting ring 41 is slidably connected to the connecting plate 40, and the other end of the limiting ring 41 is sleeved on the second connecting rod 322. This design can limit and guide the second connecting rod 322, ensuring the stability and straightness of the second connecting rod 322 during lifting and rotation, thereby improving the stability of the drill bit during drilling, ensuring the verticality and accuracy of the hole, and avoiding problems such as reduced drilling quality caused by the swing or displacement of the second connecting rod 322.

[0066] The connecting plate 40 is welded from thick steel plate, possessing sufficient strength and rigidity to ensure its stability and load-bearing capacity during construction. The inner hole of the limiting ring 41 maintains a certain gap with the outer diameter of the second connecting rod 322, ensuring smooth sliding. The limiting ring 41 can be made of wear-resistant materials, such as nylon or polyoxymethylene, to reduce friction and wear between it and the second connecting rod 322. Furthermore, multiple limiting rings 41 can be provided on the connecting plate 40, evenly distributed around the second connecting rod 322, to further improve the limiting effect.

[0067] like Figures 1-2 As shown, in this embodiment, the lifting mechanism 30 further includes a counterweight 35, a bent rod 36, and a cam 37. The counterweight 35 is sleeved on the second connecting rod 322. One end of the bent rod 36 is connected to the counterweight 35. One end of the cam 37 is connected to the output end of the third drive assembly 34. The other end of the cam 37 is used to push the bent rod 36. The third drive assembly 34 drives the cam 37 to rotate. The cam 37 can push the bent rod 36 and drive the counterweight 35 to move up and down.

[0068] Specifically, when the third drive assembly 34 drives the cam 37 to rotate, the cam 37 periodically lifts the counterweight 35. The counterweight 35 then falls freely and impacts the limiting ring 41 on the second connecting rod 322. The limiting ring 41 transmits the impact force to the impact drill bit 60, enhancing its ability to break hard rock formations. This impact method effectively breaks hard geological materials such as rock, improving drilling efficiency, and is particularly suitable for bridge pile foundation construction under complex geological conditions.

[0069] It should be noted that if the second connecting rod 322 is connected to the rotary drill bit 50, the second electromagnet 323 is energized and magnetically connected to the second magnetic component 324 (maintaining an unbroken connection). The second drive assembly 33 is activated, driving the first connecting rod 321 and consequently the second connecting rod 322 and the rotary drill bit 50 to rotate, thus performing rotary drilling. In this state, the magnetic connection between the second electromagnet 323 and the second magnetic component 324 remains stable, ensuring that the rotary drill bit 50 will not loosen during rotation, allowing for continuous and stable drilling operations, and guaranteeing the efficiency and quality of the rotary drilling operation.

[0070] When the second connecting rod 322 is connected to the impact drill bit 60, the second electromagnet 323 disconnects from the magnetic connection with the second magnetic component 324. At this time, the third drive assembly 34 is activated, and its output shaft drives the cam 37 to rotate, thereby causing the counterweight 35 to move up and down periodically. The counterweight 35 continuously falls freely, striking the limiting ring 41 from top to bottom. The limiting ring 41 transmits the impact force to the impact drill bit 60, realizing the impact operation of the impact drill bit 60. The reason why the second electromagnet 323 disconnects during this process is that the working method of the impact drill bit 60 is different from that of the rotary drilling bit 50. The impact drill bit 60 mainly relies on the impact force of the counterweight 35 to break hard geological materials such as rocks. Therefore, the counterweight 35 needs to be able to move up and down freely and impact. If the second electromagnet 323 continues to magnetically attract the second magnetic component 324, the transmission of impact force will be hindered when the counterweight 35 falls freely and impacts the limiting ring 41, and the impact force cannot be effectively and continuously transmitted to the impact drill bit 60. At the same time, the impact force will be transmitted in reverse to the second electromagnet 323, thereby increasing the risk of damage to the first connecting rod 321 and the second electromagnet 323.

[0071] The working process of the drilling equipment used for bridge pile foundation construction is as follows:

[0072] I. Initial State

[0073] The mobile vehicle 10 travels to the bridge pile foundation construction site and adjusts the levelness through the chassis leveling mechanism to ensure the verticality of subsequent drilling.

[0074] II. Replacement Procedure for Rotary Drill Bit 50 or Impact Drill Bit 60

[0075] The first drive assembly 23 is activated, causing the rotary disk 24 to rotate, thereby bringing the rotary drilling bit 50 or impact drill bit 60 to be replaced toward the second connecting rod 322. Then, the electric telescopic rod 21 is activated, retracting and moving the mounting frame 11 toward the second connecting rod 322, so that the rotary drilling bit 50 or impact drill bit 60 to be replaced is directly below the second connecting rod 322.

[0076] III. Connection and Operation of Rotary Drill Bit 50

[0077] The lifting plate 31 of the lifting mechanism 30 slides downward along the slide rail, causing the first connecting rod 321 and the second connecting rod 322 to descend. The second electromagnet 323 at the bottom of the first connecting rod 321 is aligned with the second magnetic element 324 at the top of the second connecting rod 322, and they are magnetically connected after being energized. The second drive assembly 33 is activated, driving the first connecting rod 321 to rotate via the synchronous belt 331, thereby causing the external thread 325 at the bottom of the second connecting rod 322 to screw into the internal thread 52 of the rotary drilling bit 50, realizing the connection between the second connecting rod 322 and the rotary drilling bit 50. At this time, the limiting ring 41 is sleeved on the outside of the second connecting rod 322 and is slidably connected to the connecting plate 40, limiting its movement trajectory to a straight line and ensuring the verticality of the rotary drilling hole. Then, the first electromagnet 251 of the snap-fit ​​assembly 25 on the rotary disk 24, which is connected to the rotary drilling bit 50, is energized, generating magnetic force to attract the first magnetic element 253 to compress the elastic element 252, thereby releasing the snap-fit ​​lock on the rotary drilling bit 50. Afterwards, the electric telescopic rod 21 extends, driving the mounting frame 11 and the rotary disk 24 out of their working positions to avoid interfering with the subsequent operation of the rotary drilling bit 50. Finally, the second drive assembly 33 is restarted, enabling it to sequentially drive the first connecting rod 321, the second connecting rod 322, and the rotary drilling bit 50 to rotate. During rotary drilling operations, the operator can adjust the rotation speed of the second drive assembly 33 (30 rpm - 300 rpm) through the control system to adapt to geological conditions such as soft soil and sand layers.

[0078] IV. Connection and Operation of Impact Drill Bit 60

[0079] After the rotary drilling operation is completed, the lifting plate 31 rises, causing the rotary drill bit 50 to rise. The electric telescopic rod 21 shortens, placing the rotary drill bit 50 on the rotary disk 24. Then, the first electromagnet 251 is de-energized, causing the first magnetic element 253 to engage with the slot 51 of the rotary drill bit 50 under the elastic force of the elastic element 252. Then, the second drive assembly 33 rotates in the opposite direction, causing the second connecting rod 322 to disengage from the rotary drill bit 50, and the lifting plate 31 rises a certain distance. Afterward, the first drive assembly 23 drives the rotary disk 24 to rotate, causing the impact drill bit 60 to rotate to the working position. The lifting plate 31 of the lifting mechanism 30 slides downward along the slide rail, causing the first connecting rod 321 and the second connecting rod 322 to descend. The second electromagnet 323 at the bottom of the first connecting rod 321 aligns with the second magnetic element 324 at the top of the second connecting rod 322, and they are magnetically connected after being energized. The second drive assembly 33 is activated, driving the first connecting rod 321 to rotate via the synchronous belt 331. This causes the external thread 325 at the bottom of the second connecting rod 322 to be screwed into the internal thread 52 of the impact drill bit 60, thus achieving the connection between the second connecting rod 322 and the impact drill bit 60.

[0080] Then, the first electromagnet 251 of the locking assembly 25 connected to the impact drill bit 60 on the rotary disk 24 is energized, generating a magnetic force that attracts the first magnetic element 253 to compress the elastic element 252, thereby releasing the locking of the impact drill bit 60. Afterwards, the electric telescopic rod 21 extends, driving the mounting bracket 11 and the rotary disk 24 out of the working position to avoid interfering with the subsequent construction of the impact drill bit 60.

[0081] Then, the current to the second electromagnet 323 is disconnected, so that no magnetic force is generated between the second electromagnet 323 and the second magnetic component 324. Finally, the third drive assembly 34 is activated, driving the cam 37 to rotate. The profile of the cam 37 pushes the bent rod 36 to move up and down, thereby driving the counterweight 35 sleeved on the second connecting rod 322 to periodically reciprocate up and down. When the protruding part of the cam 37 disengages from the bent rod 36, the counterweight 35 falls freely, impacting the limiting ring 41, transmitting the impact force to the impact drill bit 60, breaking the rock layer. The limiting ring 41 continuously restricts the vertical movement of the second connecting rod 322, ensuring that the impact drill bit 60 impacts in a straight line and avoids deflection. The impact frequency of the impact drill bit 60 can be controlled by adjusting the rotation speed (30rpm-60rpm) of the third drive assembly 34 to adapt to hard rock layers or gravel layers.

[0082] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0083] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A drilling device for bridge pile foundation construction, characterized in that, include: Mobile vehicle (10), on which a mounting frame (11) is provided; A drill bit switching mechanism (20) includes an electric telescopic rod (21), a connecting frame (22), a first drive assembly (23), and a rotary disk (24). One end of the electric telescopic rod (21) is connected to the mounting frame (11), and the other end is connected to the connecting frame (22). The first drive assembly (23) is disposed on the connecting frame (22), and the drive end of the first drive assembly (23) passes through the connecting frame (22) and is connected to the rotary disk (24). The first drive assembly (23) is configured to drive the rotary disk (24) to rotate. At least two drill bits are detachably mounted on the rotary disk (24); The lifting mechanism (30) includes a lifting plate (31), a connecting rod (32), a second drive assembly (33), and a third drive assembly (34). The lifting plate (31) is slidably connected to the mounting frame (11). The second drive assembly (33) and the third drive assembly (34) are both disposed on the lifting plate (31). The driving end of the second drive assembly (33) is drivenly connected to one end of the connecting rod (32), and the other end of the connecting rod (32) is used for detachable connection with the drill bit. The second drive assembly (33) can drive the connecting rod (32) to rotate the drill bit, and the third drive assembly (34) can apply pressure to the drill bit.

2. The drilling device for bridge pile foundation construction according to claim 1, characterized in that, The drill bit switching mechanism (20) further includes a snap-fit ​​assembly (25), which is disposed on the rotary disk (24). A slot (51) is provided on the peripheral sidewall of the drill bit, and the snap-fit ​​assembly (25) can snap into the slot (51).

3. The drilling device for bridge pile foundation construction according to claim 2, characterized in that, The snap-fit ​​assembly (25) includes a first electromagnet (251), an elastic element (252), and a first magnetic element (253). One end of the elastic element (252) is connected to the first electromagnet (251), and the other end of the elastic element (252) is connected to the first magnetic element (253). The first electromagnet (251) is disposed on the rotating disk (24). When the first electromagnet (251) is de-energized, the first magnetic component (253) can be engaged in the slot (51); When the first electromagnet (251) is energized, the first magnetic component (253) can be released from the slot (51).

4. The drilling device for bridge pile foundation construction according to claim 1, characterized in that, The mounting bracket (11) is provided with a slide rail, and the lifting plate (31) is slidably connected to the slide rail.

5. The drilling device for bridge pile foundation construction according to claim 1, characterized in that, The connecting rod (32) includes a first connecting rod (321) and a second connecting rod (322). The top of the first connecting rod (321) is driven to be connected to the output end of the second driving assembly (33). A second electromagnet (323) is provided at the bottom of the first connecting rod (321). A second magnetic element (324) is provided at the top of the second connecting rod (322). The bottom of the second connecting rod (322) is detachably connected to the drill bit. The second electromagnet (323) and the second magnetic element (324) are magnetically attracted to each other. The output end of the second driving assembly (33) can drive the first connecting rod (321) to rotate and drive the second connecting rod (322) and the drill bit to rotate.

6. The drilling device for bridge pile foundation construction according to claim 5, characterized in that, The second drive assembly (33) further includes a timing belt (331), one end of which is sleeved on the output end of the second drive assembly (33), and the other end of which is sleeved on the top of the first connecting rod (321); the output end of the second drive assembly (33) drives the first connecting rod (321) to rotate through the timing belt (331).

7. The drilling device for bridge pile foundation construction according to claim 5, characterized in that, The drilling device for bridge pile foundation construction also includes a connecting plate (40) and a limiting ring (41). The connecting plate (40) is located on one side of the drill bit and is connected to the mounting frame (11). One end of the limiting ring (41) is slidably connected to the connecting plate (40), and the other end of the limiting ring (41) is sleeved on the second connecting rod (322).

8. The drilling device for bridge pile foundation construction according to claim 5, characterized in that, The bottom of the second connecting rod (322) is provided with an external thread (325), and the drill bit is provided with an internal thread (52). The external thread (325) is threadedly connected to the internal thread (52).

9. The drilling device for bridge pile foundation construction according to claim 5, characterized in that, The lifting mechanism (30) further includes a counterweight (35), a bent rod (36), and a cam (37). The counterweight (35) is sleeved on the second connecting rod (322). One end of the bent rod (36) is connected to the counterweight (35). One end of the cam (37) is connected to the output end of the third drive assembly (34). The other end of the cam (37) is used to push the bent rod (36). The third drive assembly (34) drives the cam (37) to rotate. The cam (37) can push the bent rod (36) and drive the counterweight (35) to move up and down.

10. The drilling device for bridge pile foundation construction according to any one of claims 1-9, characterized in that, The drill bits include rotary drilling bits (50) and impact drilling bits (60).

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