A well digging drill bit used in construction engineering

Abstract

The present invention discloses a well-digging drill bit for construction engineering, which relates to the field of construction engineering excavation technology, including a mounting frame, a support frame fixedly mounted on the top of the mounting frame, a clamping mechanism fixedly mounted on the top of the support frame, an excavation mechanism mounted on the front side of the support frame through the clamping mechanism, a guide mechanism fixedly mounted on the lower front end of the mounting frame, the guide mechanism covering the outer side of the excavation mechanism, and a linear displacement mechanism fixedly mounted on the top rear side of the mounting frame. The present invention adopts the above structure, and the slide is installed by sliding the slide to the outer surface of the cross rail, and the limit spring drives the limit frame to move downward and insert into the limit sleeve. When disassembling, the limit frame is pulled upward to separate from the limit sleeve. This design facilitates disassembly, maintenance and repair, and improves the convenience of use. Moreover, due to its quick disassembly and assembly, different numbers of excavation mechanisms can be flexibly installed according to usage requirements, thereby enhancing the adaptability of use.

Description

Technical Field

[0001] The invention belongs to the technical field of construction engineering excavation, and in particular relates to a well digging drill bit used in construction engineering. Background Art

[0002] In the field of well excavation and processing in construction, we can also refer to the classification method of piles in the field of pile foundation engineering. According to the impact of well formation on the stratum, wells can also be divided into three categories: non-squeezing soil wells, partially squeezing soil wells and completely squeezing soil wells. The construction method of non-squeezing soil wells, such as common bored wells, is similar to non-squeezing soil piles in pile foundation engineering (such as bored piles, punched piles, CFA piles, etc.). There are many problems in technology, environmental protection, cost, etc. In the process of well excavation in construction, the construction of such non-squeezing soil wells may lead to insufficient stability of the well wall and low construction efficiency. At the same time, it may cause a greater impact on the surrounding environment, such as noise, dust and other pollution. The pile foundation engineering community has been committed to developing new types of pile foundations. In the field of well excavation and processing, people are also constantly exploring a new type of well excavation method with high bearing capacity, less construction environmental pollution and good economic benefits. As a completely squeezed soil type pile, the spiral squeezed soil bored pile brings a new idea to the well digging construction. In the well digging construction, if a spiral squeezed soil bored pile-like spiral squeezed soil bored pile is used, the soil in the original well hole can be squeezed into the well hole side wall when drilling and lifting the drill without being discharged from the ground. In this way, not only the physical and mechanical properties of the soil around the well are improved, the bearing capacity and stability of the well are increased, but also the whole construction process is pollution-free, vibration-free and low-noise. However, at present, in the field of well digging in construction construction, most of the existing drill bits and drilling tools are single-axis, just like the single-axis drill bits and drilling tools in pile foundation projects. Each time the drill is drilled and lifted, only one well hole can be formed. Therefore, its application is greatly limited under the condition of tight construction period. If a multi-axis spiral squeezed soil digging device can be developed, the well digging efficiency can be greatly improved to meet the strict requirements of construction period in construction.

[0003] The Chinese patent with the announcement number "CN216553769U" discloses a dual-axis spiral extrusion drilling tool capable of synchronous drilling, which includes two threaded drill rods, a connecting rod, a frequency conversion motor and a speed sensor. The two threaded drill rods are parallel and vertically arranged. Each threaded drill rod includes a drill bit, a spiral part and a polished rod part from bottom to top. The polished rod parts of the two threaded drill rods are connected by at least one connecting rod. The top of each threaded drill rod is provided with a frequency conversion motor, and rotates around its own axis under the drive of the corresponding frequency conversion motor. The polished rod part of each threaded drill rod is also provided with a speed sensor. The present application adopts a dual-axis drilling tool setting, which can complete the drilling of multiple pile holes at the same time, thereby improving the construction efficiency of spiral soil extrusion and grouting piles. At the same time, when the dual-axis drilling tool encounters resistance during the drilling process of the two axes, the speed sensor will detect that the speeds of the two axes are different, and transmit data to the frequency conversion motor. The frequency conversion motor will issue an alarm. At this time, the speed of the frequency conversion motor is manually adjusted to maintain the stability of the two-axis drilling tool.

[0004] During the application of the above-mentioned device, first of all, it can only realize two-axis excavation processing during the processing process, and the overall application adaptability is poor, and it is unable to further realize more excavation processing. At the same time, its various excavation drill bits are difficult to be quickly disassembled and assembled as a whole. Since the excavation drill bit needs to contact the ground violently and perform excavation and drilling during use, it is obvious that the overall structure of the excavation drill bit itself and the bottom rotating shaft will suffer greater wear and tear during normal use. Therefore, during use, usually after each drilling process is completed, or when an excavation failure occurs, the excavation drill bit as a whole needs to be inspected and maintained. However, it is obvious that the above-mentioned device cannot be quickly disassembled to inspect the excavation drill bit as a whole during use. The entire disassembly and assembly and maintenance process is relatively time-consuming and labor-intensive, and consumes a lot of manpower and material resources. Summary of the Invention

[0005] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide a well digging drill bit for construction engineering to solve the problems raised in the background technology.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A well-digging drill bit for construction projects comprises a mounting frame, a support frame fixedly mounted on the top of the mounting frame, a clamping mechanism fixedly mounted on the top of the support frame, an excavation mechanism mounted on the front side of the support frame via the clamping mechanism, a guide mechanism fixedly mounted on the lower front end of the mounting frame, the guide mechanism covering the outer side of the excavation mechanism, a linear displacement mechanism fixedly mounted on the rear side of the top of the mounting frame, and the front side of the linear displacement mechanism and the rear side of the clamping mechanism fixedly connected;

[0008] The clamping mechanism includes a vertical rail, which is fixedly installed on the top of the mounting frame at equal intervals. The inner upper end of the vertical rail is slidably connected to the limiting assembly. The front side of the limiting assembly is fixedly installed with a cross rail. The interior of the cross rail is slidably connected with a slide at equal intervals. The front side of the slide is fixedly connected to the back side of the excavating mechanism. The front end of the limiting assembly is clamped with the top of the slide. The bottom of the cross rail is fixedly installed with a connecting arm at equal intervals. The rear side of the connecting arm is fixedly connected to the linear displacement mechanism.

[0009] As an optimal technical solution, the excavation mechanism includes a support rod, which is fixedly installed on the front side of the slider, a fixed plate is fixedly installed on the front end of the support rod, a first motor is fixedly installed on the top of the fixed plate, an output end of the first motor passes through the fixed plate and is fixedly installed with an excavation auger, and a drill bit assembly is fixedly installed at the bottom of the excavation auger.

[0010] As an optimal technical solution, the drill bit assembly includes a hexagonal plug, the outer side of the hexagonal plug is provided with a hexagonal socket, the hexagonal socket is installed on the outer side of the hexagonal plug by bolts, and the bottom of the hexagonal socket is fixedly installed with a spiral drill bit.

[0011] As a preferred technical solution, the outer surface of the auger drill bit is fixedly connected with drill teeth at equal intervals, and the outer surface of the excavation auger is fixedly installed with an auger.

[0012] As an optimal technical solution, the limit assembly includes a sliding frame and a limit sleeve. The sliding frame is slidably connected to the inside of the vertical rail. The sliding frame is fixedly connected to a limit spring. A slide is fixedly installed on the top of the limit spring. A limit frame is fixedly installed on the top of the slide. The limit sleeve is fixedly installed on the top of the slide. The end of the limit frame is inserted into the inner side of the limit sleeve.

[0013] As an optimal technical solution, the linear displacement mechanism includes a longitudinal rail, which is fixedly installed in the middle of the top rear side of the mounting frame. A second motor is fixedly installed on the top of the longitudinal rail, and the output end of the second motor passes through the longitudinal rail and is fixedly installed with a screw rod. The screw rod is rotatably connected to the inside of the longitudinal rail, and the outer surface of the screw rod is threadedly connected to a sliding block. A connecting frame is fixedly installed on the front of the sliding block, and the front side of the connecting frame is fixedly connected to the rear end of the connecting arm.

[0014] As an optimal technical solution, support arms are fixedly installed at both ends of the rear side of the connecting frame, and sliding grooves are opened on both sides of the longitudinal rail. The rear end of the support arm is slidably connected to the inner side of the sliding grooves on both sides of the longitudinal rail.

[0015] As an optimal technical solution, the guide mechanism includes a concave seat, which is fixedly installed on the front lower end of the support frame. Mounting grooves are provided on both sides of the upper front end of the concave seat. The inner side of the mounting groove is slidably connected to a guide frame. The rear sides of both ends of the bottom of the guide frame are rotatably connected to the limiting blocks. Special-shaped grooves are provided on both sides of the bottom of the concave seat. The inner side of the special-shaped groove is slidably connected to a positioning frame. The inner side of the positioning frame is fitly connected to both sides of the limiting block.

[0016] As an optimal technical solution, a mud brush is installed inside the guide frame by means of bolts, and the excavation auger is slidably connected between the concave seat and the inner side of the guide frame.

[0017] In summary, the present invention mainly has the following beneficial effects:

[0018] First, by sliding the slide to the outer surface of the cross rail, the limit spring drives the limit frame to move down and insert into the limit sleeve to realize the installation of the slide. When disassembling, the limit frame is pulled up and separated from the limit sleeve. This design facilitates disassembly, maintenance and repair, and improves the convenience of use. Moreover, due to its fast disassembly and assembly, different numbers of excavation mechanisms can be flexibly installed according to the use requirements, which enhances the adaptability of use. In addition, its multi-axis design can further improve the excavation quantity and its excavation efficiency compared with the two-axis drive.

[0019] Second, by arranging the linear displacement mechanism and the excavation mechanism to cooperate with each other, during use, the second motor is started to drive the screw to rotate in the longitudinal rail, driving the slider to slide up and down, driving the connecting frame and the auger drill bit to move downward, and then the first motor is started to drive the excavation auger to rotate. In conjunction with the drill barrel, drill teeth and auger, excellent drilling and excavation are achieved. The auger can assist in excavation and turning the soil, ensuring stable and efficient drilling processing;

[0020] Third, by setting up a guide mechanism, when in use, the guide frame and the concave seat cooperate with each other to assist in limiting, allowing the excavation auger to move smoothly. When drilling, the mud brush can clean the mud outside the auger, and gravity causes the positioning frame in the special-shaped groove to naturally fall and limit, which is convenient for installing the guide frame and the concave seat. When disassembling, push the positioning frame to retract it, and pull the guide frame, which is convenient for inspection, maintenance, disassembly and replacement, and improves convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the top structure of the present invention;

[0023] Figure 3 It is a bottom view structural diagram of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the linear displacement mechanism of the present invention;

[0025] Figure 5 This is a front structural schematic diagram of the guide mechanism of the present invention in a disassembled state;

[0026] Figure 6 This is a schematic diagram of the rear view structure of the guide mechanism of the present invention in a disassembled state;

[0027] Figure 7 It is a schematic structural diagram of the clamping mechanism and the excavating mechanism of the present invention;

[0028] Figure 8 It is a schematic structural diagram of the excavation mechanism of the present invention;

[0029] Figure 9 It is a schematic structural diagram of the limit assembly of the present invention;

[0030] Figure 10 It is a schematic structural diagram of the position limiting assembly of the present invention in a disassembled state.

[0031] Figure numerals: 1, mounting frame; 2, support frame; 3, clamping mechanism; 31, vertical rail; 32, limit assembly; 321, slide frame; 322, limit sleeve; 323, limit spring; 324, slide; 325, limit frame; 33, cross rail; 34, slide; 35, connecting arm; 4, excavation mechanism; 41, support rod; 42, fixing plate; 43, first motor; 44, excavation auger; 45, drill assembly; 451, six Angle plug; 452, hexagonal socket; 453, auger drill bit; 454, drill teeth; 455, auger; 5, guide mechanism; 51, concave seat; 52, mounting groove; 53, guide frame; 54, limit block; 55, positioning frame; 56, mud brush; 57, special-shaped groove; 6, linear displacement mechanism; 61, longitudinal rail; 62, second motor; 63, screw rod; 64, sliding block; 65, connecting frame; 66, support arm; 67, slide groove. DETAILED DESCRIPTION

[0032] Example

[0033] refer to Figures 1 to 10 The present embodiment is a well-digging drill bit for construction engineering, comprising a mounting frame 1, a support frame 2 being fixedly mounted on the top of the mounting frame 1, a clamping mechanism 3 being fixedly mounted on the top of the support frame 2, an excavation mechanism 4 being mounted on the front side of the support frame 2 via the clamping mechanism 3, a guide mechanism 5 being fixedly mounted on the lower front end of the mounting frame 1, the guide mechanism 5 being covered on the outside of the excavation mechanism 4, a linear displacement mechanism 6 being fixedly mounted on the rear side of the top of the mounting frame 1, the front side of the linear displacement mechanism 6 being fixedly connected to the rear side of the clamping mechanism 3;

[0034] The clamping mechanism 3 includes a vertical rail 31, which is fixedly installed on the top of the mounting frame 1 at equal intervals. The upper end of the vertical rail 31 is slidably connected to the limit assembly 32. The front side of the limit assembly 32 is fixedly installed with a cross rail 33. The interior of the cross rail 33 is slidably connected with a slide 34 at equal intervals. The front side of the slide 34 is fixedly connected to the back of the excavating mechanism 4. The front end of the limit assembly 32 is clamped with the top of the slide 34. The bottom of the cross rail 33 is fixedly installed with a connecting arm 35 at equal intervals. The rear side of the connecting arm 35 is fixedly connected to the linear displacement mechanism 6. The vertical rail 31 and the limit assembly 32 in the clamping mechanism 3 ensure the stable installation of the slide 34. The scalability and detachability enable the excavation mechanism 4 to be flexibly installed and replaced according to actual needs, thereby improving the applicability and maintenance convenience of the equipment. The guide mechanism 5 effectively limits the movement trajectory of the excavation mechanism 4, enabling it to move up and down more smoothly during operation, reducing unnecessary shaking and deviation, and improving the accuracy and quality of construction. The synergistic effect of the linear displacement mechanism 6 and the clamping mechanism 3 realizes the precise displacement control of the excavation mechanism 4, ensuring the depth and position accuracy of drilling and excavation. The coordinated work of the overall structure improves the working efficiency and stability of the excavation drill bit, and reduces maintenance costs and operational difficulty.

[0035] refer to Figure 7-Figure 8 The excavation mechanism 4 includes a support rod 41, which is fixedly mounted on the front side of the slider. A fixing plate 42 is fixedly mounted on the front end of the support rod 41. A first motor 43 is fixedly mounted on the top of the fixing plate 42. The output end of the first motor 43 passes through the fixing plate 42 and is fixedly mounted with an excavation auger 44. A drill bit assembly 45 is fixedly mounted on the bottom of the excavation auger 44. The drill bit assembly 45 includes a hexagonal plug 451. A hexagonal socket 452 is sleeved on the outer side of the hexagonal plug 451. The hexagonal socket 452 is mounted on the outer side of the hexagonal plug 451 by bolts. An auger drill bit 453 is fixedly mounted on the bottom of the hexagonal socket 452. The outer surface of the auger drill bit 453 is uniformly spaced. The distance is fixedly connected with a drill tooth 454, and a auger 455 is fixedly installed on the outer surface of the excavation auger 44. The support rod 41 provides a stable support for the fixed plate 42 and subsequent components. The first motor 43 drives the excavation auger 44 to rotate for well digging and excavation processing. In the drill bit assembly 45, the cooperation and bolt fixation of the hexagonal plug 451 and the hexagonal sleeve 452 ensure the firmness and detachability of the auger bit 453, which is convenient for replacing the worn auger bit 453. The setting of the drill tooth 454 enhances the excavation ability of the auger bit 453, and the auger 455 can assist in improving the excavation effect, making the excavation more uniform and in-depth, and improving the working quality and efficiency of the excavation drill bit.

[0036] refer to Figure 7-10The limit assembly 32 includes a slide frame 321 and a limit sleeve 322. The slide frame 321 is slidably connected to the inside of the vertical rail 31. The limit spring 323 is fixedly connected to the slide frame 321. The top of the limit spring 323 is fixedly installed with a slide plate 324. The top of the slide plate 324 is fixedly installed with a limit frame 325. The limit sleeve 322 is fixedly installed on the top of the slide frame 34. The end of the limit frame 325 is inserted into the inner side of the limit sleeve 322. The linear displacement mechanism 6 includes a longitudinal rail 61 The longitudinal rail 61 is fixedly installed in the middle of the top rear side of the mounting frame 1. The top of the longitudinal rail 61 is fixedly installed with a second motor 62. The output end of the second motor 62 passes through the longitudinal rail 61 and is fixedly installed with a screw rod 63. The screw rod 63 is rotatably connected to the inside of the longitudinal rail 61. The outer surface of the screw rod 63 is threadedly connected to a sliding block 64. The front of the sliding block 64 is fixedly installed with a connecting frame 65. The front side of the connecting frame 65 is fixedly connected to the rear end of the connecting arm 35. Both ends of the rear side of the connecting frame 65 are fixed. The support arm 66 is fixedly installed, and the two sides of the longitudinal rail 61 are provided with a slide groove 67. The rear end of the support arm 66 is slidably connected to the inner side of the slide groove 67 on both sides of the longitudinal rail 61, and the slide frame 321 slides in the vertical rail 31 to ensure the smoothness of movement. The cooperation of the limit spring 323 and the slide plate 324 enables the limit frame 325 to be stably inserted into the limit sleeve 322 to achieve reliable limit and fixation, thereby ensuring the stable position of the slide 34 and facilitating the disassembly operation. The linear displacement mechanism 6 plays an important role. The longitudinal rail 61 provides a stable running track for the screw rod 63 and the sliding block 64. The second motor 62 drives the screw rod 63 to rotate accurately, thereby driving the sliding block 64 to move up and down, and drives the entire excavating mechanism 4 to move through the connecting frame 65 and the connecting arm 35. The control is accurate and efficient. The sliding connection between the support arm 66 and the slide grooves 67 on both sides of the longitudinal rail 61 enhances the stability and accuracy of the movement of the sliding block 64, so that the excavating drill bit can accurately reach the designated position for operation.

[0037] refer to Figures 1-6The guide mechanism 5 includes a concave seat 51, which is fixedly mounted on the lower end of the front side of the support frame 2. Mounting grooves 52 are provided on both sides of the upper front end of the concave seat 51. The inner side of the mounting groove 52 is slidably connected to a guide frame 53. The rear sides of both ends of the bottom of the guide frame 53 are rotatably connected to the limit blocks 54. Special-shaped grooves 57 are provided on both sides of the bottom of the concave seat 51. The inner side of the special-shaped groove 57 is slidably connected to a positioning frame 55. The inner side of the positioning frame 55 is fitted with both sides of the limit blocks 54. A mud brush 56 is installed inside the guide frame 53 by bolts. The excavation auger 44 is slidably connected between the concave seat 51 and the inner side of the guide frame 53. The design of the guide mechanism 5 brings many advantages. The concave seat 51 and the guide frame 53 are installed The sliding connection of the mounting groove 52 realizes the convenient installation and disassembly of the guide frame 53, which is convenient for maintenance and replacement. The fitting connection between the positioning frame 55 in the special-shaped groove 57 and the limit block 54 effectively limits the position of the guide frame 53, ensuring that it will not deviate during work, thereby improving the stability and accuracy of the movement of the excavation auger 44. The mud brush 56 is installed in the guide frame 53 by bolts, which is convenient for disassembly, cleaning and replacement. It can clean the mud on the outer surface of the excavation auger 44 in time and effectively, ensuring the normal operation of the excavation auger 44. The sliding connection of the excavation auger 44 between the concave seat 51 and the inner side of the guide frame 53 makes its movement more stable, reduces the working error caused by shaking, and improves the work quality and efficiency.

[0038] The principle and advantages of use: By setting the clamping mechanism 3, during the use of the device, the slide 34 can be slid to the outer surface of the cross rail 33. At this time, the limit spring 323 drives the limit frame 325 to move downward by virtue of its reset resistance. After the limit frame 325 moves downward, it can be smoothly inserted into the inner side of the limit sleeve 322. With the help of the mutual limitation between the limit frame 325 and the limit sleeve 322, the slide 34 can be effectively assisted to be installed on the inner side of the cross rail 33. During use, if disassembly operation is required, it is only necessary to pull out the limit frame on the top. 325 moves upward. Once the limit frame 325 moves upward, it will drive it to disengage from the interior of the limit sleeve 322, so that the limit frame 325 and the limit sleeve 322 are separated from each other, so that the slide 34 can be quickly removed from the outer surface of the cross rail 33. The device is easy to disassemble, maintain and repair during the overall use process, which greatly improves the overall convenience of use of the device. In addition, its unique design of quick disassembly and assembly can flexibly install different groups of excavating mechanisms 4 according to specific use needs during use, which significantly improves the overall use adaptability of the device.

[0039] By setting the linear displacement mechanism 6 and the excavation mechanism 4 to cooperate with each other, during the use of this device, the second motor 62 can be started to operate, and the operation of the second motor 62 will drive the screw rod 63 to rotate, and the screw rod 63 will rotate inside the longitudinal rail 61, and then the slider can be driven to slide up and down inside the longitudinal rail 61 through the screw rod 63. At this time, the sliding block 64 moves up and down, and can assist in driving the connecting frame 65 to move down, and the downward movement of the connecting frame 65 will drive the auger drill bit 453 to move down. At this time, the first motor 43 is started to operate, and the first motor 43 can drive the excavation auger 44 to rotate. The rotation of the excavation auger 44 can drive the auger drill bit 453 to drill, and the drill barrel cooperates with the drill teeth 454 and the auger 455 to rotate, and then the sliding block 64 is driven downward by the screw rod 63, thereby achieving an excellent drilling and excavation effect. The rotation of the auger 455 can not only assist in drilling and excavation, but also turn the soil upward at the same time, so that this device can achieve stable and efficient drilling processing;

[0040] By setting the guide mechanism 5, during the use of the device, the guide frame 53 and the concave seat 51 can cooperate with each other, so that the device can make use of the auxiliary limiting effect of the guide frame 53 and the concave seat 51 to prompt each excavation auger 44 to move up and down more smoothly on the inner side of the guide frame 53 and the concave seat 51, and in the drilling and excavation process, by setting the mud brush 56, the mud on the outer surface of the auger 455 can be cleaned, with a good cleaning effect. At the same time, during use, due to the influence of gravity, the positioning frame 55 inside the special-shaped groove 57 naturally falls under the action of gravity, and the positioning frame 55 is covered on the outside of the limit block 54. The limit block 54 is limited by the positioning frame 55, so that the two ends of the guide frame 53 can be stably located on the inner side of the installation groove 52. At this time, the guide frame 53 and the concave seat 51 can be quickly assembled and installed. If disassembly is required, it is only necessary to push the positioning frame 55 upward to retract the positioning frame 55 into the inside of the special-shaped groove 57. Once the two sides of the limit block 54 and the positioning frame 55 lose contact and limit, the two sides of the rear end of the guide frame 53 can be pulled out from the inside of the installation groove 52, making the entire device easy to inspect, maintain, disassemble and replace, effectively improving the overall ease of use of the device.

Claims

1. A well-digging drill bit for construction engineering, characterized by: A support frame is fixedly mounted on the top of the mounting frame, a clamping mechanism is fixedly mounted on the top of the supporting frame, an excavation mechanism is mounted on the front side of the supporting frame via the clamping mechanism, a guide mechanism is fixedly mounted on the lower front end of the mounting frame, the guide mechanism covers the outer side of the excavation mechanism, a linear displacement mechanism is fixedly mounted on the rear side of the top of the mounting frame, and the front side of the linear displacement mechanism is fixedly connected to the rear side of the clamping mechanism; The clamping mechanism includes a vertical rail, which is fixedly installed on the top of the mounting frame at equal intervals. The upper end of the vertical rail is slidably connected to the limit assembly. The front side of the limit assembly is fixedly installed with a cross rail. The interior of the cross rail is slidably connected with a slide at equal intervals. The front side of the slide is fixedly connected to the back side of the excavation mechanism. The front end of the limit assembly is clamped with the top of the slide. The bottom of the cross rail is fixedly installed with connecting arms at equal intervals. The rear side of the connecting arm is fixedly connected to the linear displacement mechanism. The excavation mechanism includes a support rod, the support rod is fixedly mounted on the front side of the slider, a fixing plate is fixedly mounted on the front end of the support rod, a first motor is fixedly mounted on the top of the fixing plate, an output end of the first motor passes through the fixing plate and is fixedly mounted with an excavation auger, and a drill bit assembly is fixedly mounted on the bottom of the excavation auger; The drill bit assembly includes a hexagonal plug, the outer side of the hexagonal plug is provided with a hexagonal socket, the hexagonal socket is mounted on the outer side of the hexagonal plug by bolts, and the bottom of the hexagonal socket is fixedly mounted with an auger drill bit; The outer surface of the auger drill bit is fixedly connected with drill teeth at equal intervals, and the outer surface of the excavation auger is fixedly installed with an auger; The limit assembly includes a sliding frame and a limit sleeve, the sliding frame is slidably connected to the inside of the vertical rail, the sliding frame is fixedly connected to the limit spring, the top of the limit spring is fixedly installed with a slide, the top of the slide is fixedly installed with a limit frame, the limit sleeve is fixedly installed on the top of the sliding frame, and the end of the limit frame is inserted into the inner side of the limit sleeve; The linear displacement mechanism includes a longitudinal rail, which is fixedly mounted in the middle of the top rear side of the mounting frame, a second motor is fixedly mounted on the top of the longitudinal rail, an output end of the second motor passes through the longitudinal rail and is fixedly mounted with a screw, the screw is rotatably connected to the inside of the longitudinal rail, the outer surface of the screw is threadedly connected to a sliding block, a connecting frame is fixedly mounted on the front side of the sliding block, and the front side of the connecting frame is fixedly connected to the rear end of the connecting arm; The guide mechanism includes a concave seat, which is fixedly mounted on the front lower end of the support frame. Mounting grooves are provided on both sides of the front upper end of the concave seat. The inner side of the mounting groove is slidably connected to a guide frame. The rear sides of both ends of the bottom of the guide frame are rotatably connected to a limit block. Special-shaped grooves are provided on both sides of the bottom of the concave seat. A positioning frame is slidably connected to the inner side of the special-shaped groove. The inner side of the positioning frame is fit-fitted to both sides of the limit block.

2. A well-digging drill bit for construction engineering according to claim 1, characterized in that: Support arms are fixedly mounted on both ends of the rear side of the connecting frame, sliding grooves are provided on both sides of the longitudinal rail, and the rear ends of the support arms are slidably connected to the inner sides of the sliding grooves on both sides of the longitudinal rail.

3. A well-digging drill bit for construction engineering according to claim 1, characterized in that: A mud brush is installed inside the guide frame through bolts, and the excavation auger is slidably connected between the concave seat and the inner side of the guide frame.

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