A drilling device for geotechnical engineering investigation

Abstract

The application discloses a drilling device for geotechnical engineering investigation, which comprises a bottom plate, a driver arranged above the bottom plate, a machine body arranged on the upper surface of the bottom plate, a transmission connection between the output end of the driver and the input end of the machine body through a belt, a connecting piece arranged on one side of the machine body, and an adjusting device arranged on the surface of the bottom plate. The adjusting device comprises two hollow frames, and the two hollow frames are arranged on the two sides of the bottom plate respectively. The adjusting device is arranged to facilitate position adjustment of the equipment. The existing equipment is usually of a fixed structure after assembly and drilling, and needs to be drilled and investigated at different positions during drilling. Due to the over-heavy equipment, operation is inconvenient during small-range movement, the workload of workers is increased, the efficiency of the equipment during investigation at different positions is low, and the overall usability of the equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of geotechnical drilling technology, specifically to a drilling device for geotechnical engineering exploration. Background Technology

[0002] Geotechnical engineering investigation refers to the activities of investigating, analyzing, and evaluating the geological and environmental characteristics and geotechnical engineering conditions of a construction site according to the requirements of a construction project, compiling investigation documents, using testing methods to investigate and analyze the construction site, studying the geological conditions of various engineering structures and the impact of construction on the natural geological environment; studying measures to ensure the strength and stability of the foundation and prevent unacceptable deformation when the foundation, substructure, and superstructure work together; proposing the bearing capacity of the foundation; providing the engineering site and geotechnical engineering data required for foundation design and construction, and, when necessary, foundation reinforcement; and drilling equipment is used to drill holes during geotechnical engineering investigation.

[0003] However, existing processing equipment has the following shortcomings:

[0004] In the case of existing equipment, such as CN218150730U, this utility model relates to the field of geotechnical drilling technology and discloses a drilling device for geotechnical engineering exploration, including a fixed frame, a sliding groove is provided on the outer side of the fixed frame, a sliding seat is slidably connected to the outer side of the sliding groove, a drive motor is fixedly installed on one side of the sliding seat, and a drilling rod and a drill bit are fixedly connected to the output shaft of the drive motor. The electric push rod pushes the U-shaped frame and drive gear downwards. The drive gear, influenced by the fixed rack, rotates on its own. Simultaneously, the drive gear carries the moving rack downwards along the guide rail. The moving rack is fixedly connected to the slide block via a connecting column. At this time, the slide block moves downwards, which in turn drives the motor, drill rod, and drill bit to move downwards. Compared with traditional hydraulic drive, screw drive, and cylinder drive downwards, this application achieves twice the distance of movement for the same length, thereby doubling the movement path of the drive motor of the drilling device. This solves the problem that the current methods for moving the drive motor of drilling devices downwards generally use hydraulic telescopic movement, screw transmission movement, and cylinder telescopic movement. These three driving methods can only guarantee that the drive motor of the drilling device can move to a certain position before being limited. For example, hydraulic drive, cylinder drive, and screw transmission are entirely dependent on their own length. When the length is limited, the drive motor of the drilling device cannot move downwards to drill for rock and soil, thus reducing the efficiency of sampling and exploration.

[0005] The inventors have discovered that when drilling equipment is in use, because the equipment is usually a fixed structure after assembly and drilling needs to be carried out at different locations, the equipment is too bulky, making it inconvenient to operate when moving within a small range. This also increases the workload of workers and creates a burden. In addition, the equipment is inefficient when surveying different locations, which makes it difficult to move and adjust the equipment to drill into the soil and rock at different locations.

[0006] Therefore, we propose a drilling device for geotechnical engineering investigation to solve the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to provide a drilling device for geotechnical engineering exploration, in which a screw drives a slider to slide and adjust its position on a hollow frame for drilling, thereby solving the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a drilling device for geotechnical engineering exploration, comprising a base plate, a driver disposed above the base plate, an organism disposed on the upper surface of the base plate, the output end of the driver being connected to the input end of the organism via a belt drive, a connector disposed on one side of the organism, and an adjustment device disposed on the surface of the base plate, the adjustment device comprising a hollow frame, two hollow frames being disposed on opposite sides of the base plate, sliders being fixedly connected to both sides of the base plate, the sliders being slidably connected to the inner walls of the hollow frames, two hollow seats being fixedly connected to the surface of the hollow frames, a screw being rotatably connected to the inner wall of the hollow seats, a hole being formed on the side of the slider near the screw, the screw being threadedly connected to the inner wall of the hole, a handle being fixedly connected to one end of the screw, the handle being a combination of a disc and a cylindrical grip, by setting the handle in conjunction with the screw, the slider can be controlled to slide within the hollow frame, facilitating the movement of the adjustment device and enabling drilling exploration at different locations.

[0009] Preferably, a gear is fixedly connected to the surface of the screw, and two slide rods are fixedly connected to the surface of the hollow frame near the handle. The surfaces of the two slide rods are slidably connected with locking teeth, which mesh with the gear. By engaging the gear with the locking teeth, the screw can be restricted after the equipment is adjusted, thereby improving the overall stability of the equipment.

[0010] Preferably, a first spring is sleeved on the surface of the slide rod, and the two ends of the first spring are fixedly connected to the surfaces of the slide rod and the locking teeth, respectively. By setting the first spring, it is convenient to control the locking teeth to reset, improve the stability of the locking teeth, and at the same time improve the binding effect of the locking teeth on the gears.

[0011] Preferably, a pedal is fixedly connected to the surface of the toothed part. The pedal is composed of an L-shaped rod and a rectangular plate. By setting the pedal, it is convenient for manual adjustment by stepping on and rotating the handle.

[0012] Preferably, the surface of the hollow frame is provided with a stabilizing device, which includes four support plates. Each of the four support plates is fixedly connected to the surface of the hollow frame in pairs. A through hole is formed on the surface of each support plate, and a pin is slidably connected to the inner wall of the through hole. A rectangular groove is formed on the inner wall of each pin, and three round holes are formed on each side of the inner wall of the rectangular groove. A positioning pin is slidably connected to the inner wall of each round hole. A connecting hole is formed on the surface of the pin, and a screw is rotatably connected to the inner wall of the connecting hole. A pressing block is slidably connected to the inner wall of the rectangular groove in the pin. A hole is formed on the surface of the pressing block, and the screw is threadedly connected to the inner wall of the hole on the surface of the pressing block. Rotation of the screw controls the movement of the pressing block, which can press the positioning pin, causing the positioning pin to pass through the round hole on the surface of the pin. This completes the overall positioning of the equipment, reducing the likelihood of the equipment shifting due to vibration during drilling, thus affecting the drilling process.

[0013] Preferably, a second spring is sleeved on the surface of the positioning pin, and the two ends of the second spring are fixedly connected to the inner wall of the rectangular groove in the positioning pin and the insertion pin, respectively. By setting the second spring, it is easy to control the positioning pin to reset, which facilitates subsequent removal.

[0014] Preferably, a knob is fixedly connected to one end of the second screw, and two auxiliary plates are fixedly connected to the surface of the pin. By setting the knob, it is easy to control the rotation of the second screw, and at the same time, the auxiliary plates can facilitate the insertion of the pin, thereby improving the overall ease of use.

[0015] Preferably, the surface of the base plate is provided with an auxiliary device, which includes a hollow sleeve fixedly connected to the surface of the base plate. A support rod is rotatably connected to the inner wall of the hollow sleeve, and a fixing rod is fixedly connected to one end of the support rod. A circular hole is opened in the inner wall of the hollow sleeve, and a screw rod is rotatably connected to the inner wall of the circular hole. A hole is opened on the surface of the support rod, and the screw rod is threadedly connected to the inner wall of the hole. By rotating the screw rod, the screw rod drives the support rod and the fixing rod to move in the hollow sleeve. The fixing rod will squeeze the belt, thereby adjusting the belt tension and reducing the situation where the belt is too loose, resulting in poor power during drilling.

[0016] Preferably, a roller is rotatably connected to the surface of the fixing rod, and the roller is in contact with the surface of the belt. By setting the roller, the wear on the belt can be reduced and the overall usability can be improved.

[0017] Preferably, one end of the screw three is fixedly connected to an adjusting component. By setting the adjusting component, it is easy to control the rotation of the screw three and to easily adjust the tightness.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This invention uses a driver to transmit power to the machine body, assembling the drill rod onto the connecting rod for drilling operations. By incorporating an adjustment device, when the equipment needs to be used, the worker steps on a pedal. The pedal causes the locking teeth to move within the sliding rod. The first spring deforms under pressure, generating elasticity, and the locking teeth lose their restraining effect on the gear. By turning the handle, the handle drives the first screw to rotate, which in turn drives the slider to slide and adjust its position on the hollow frame for drilling. After adjustment, the worker releases the pedal, the first spring causes the locking teeth to reset, and the locking teeth abut against the inner wall of the gear, thus completing the adjustment. This adjustment device facilitates easy position adjustment of the equipment, effectively reducing the inconvenience caused by the fixed structure of existing equipment after assembly and the need for drilling at different locations. The heavy equipment makes operation difficult in small-range movements, increasing the workload for workers. This invention reduces the inefficiency of the equipment when surveying different locations, thereby improving the overall usability of the equipment.

[0020] 2. This invention, by setting up a stabilizing device, allows for manual insertion of a pin into the soil or rock via an auxiliary plate when the equipment is needed. After insertion, rotating the knob and screw two causes the screw two to slide the pressing block in the rectangular groove of the pin. The pressing block presses the positioning pin, causing it to move out of the central hole of the pin and into the soil or rock. The second spring is then stressed, thus completing the positioning of the equipment. By setting up a stabilizing device, the equipment can be placed stably, effectively reducing the risk of the equipment shifting due to vibrations during drilling. This reduces the likelihood of the drill rod shifting and causing damage during drilling, thereby improving the overall stability of the equipment.

[0021] 3. This invention incorporates an auxiliary device. When the equipment is needed, rotating the adjusting component causes the screw three to rotate. The screw three then drives the support rod to slide within the hollow sleeve. The support rod, in turn, drives the fixed rod and roller to compress the belt, thereby adjusting the belt tension. As the belt rotates, it causes the roller to rotate on the fixed rod, which reduces wear. This auxiliary device facilitates the use of the auxiliary equipment and effectively reduces the problem of the belt becoming too loose during prolonged operation, which can lead to poor power transmission and reduced drilling efficiency. This, in turn, improves the overall practicality of the equipment. Attached Figure Description

[0022] Figure 1 This is a three-dimensional view of the main structure of a drilling device for geotechnical engineering exploration according to the present invention;

[0023] Figure 2 This is a three-dimensional side view of a drilling device for geotechnical engineering exploration according to the present invention.

[0024] Figure 3 This invention relates to a drilling device for geotechnical engineering exploration. Figure 2 Enlarged 3D view of the structure at point A in the middle;

[0025] Figure 4 This is a three-dimensional structural view of a stabilization device in a drilling apparatus for geotechnical engineering exploration according to the present invention.

[0026] Figure 5 This is a partial cross-sectional perspective view of a drilling device for geotechnical engineering exploration, which is a stabilizing device according to the present invention.

[0027] Figure 6 In a drilling device for geotechnical engineering exploration according to the present invention, Figure 5 Enlarged 3D view of the structure at point B in the middle;

[0028] Figure 7 This is a three-dimensional cross-sectional view of the auxiliary device portion of a drilling device for geotechnical engineering exploration according to the present invention.

[0029] Figure 8 This invention provides a drilling device for geotechnical engineering exploration. Figure 7 Enlarged 3D view of the structure at point C.

[0030] In the diagram: 1. Base plate; 2. Driver; 3. Body; 4. Connector; 5. Adjustment device; 51. Hollow frame; 52. Slider; 53. Screw 1; 54. Gear; 55. Hollow seat; 56. Handle; 57. Pedal; 58. Gear; 59. Slide rod; 510. First spring; 6. Stabilizing device; 61. Pin; 62. Auxiliary plate; 63. Knob; 64. Screw 2; 65. Positioning pin; 66. Second spring; 67. Extrusion block; 68. Support plate; 7. Auxiliary device; 71. Hollow sleeve; 72. Support rod; 73. Screw 3; 74. Adjustment component; 75. Fixing rod; 76. Roller. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1-8 As shown, the present invention provides a technical solution: a drilling device for geotechnical engineering exploration, including a base plate 1, a driver 2 disposed above the base plate 1, an assembly 3 disposed on the upper surface of the base plate 1, the output end of the driver 2 being connected to the input end of the assembly 3 via a belt drive, a connector 4 disposed on one side of the assembly 3, and an adjustment device 5 disposed on the surface of the base plate 1. The adjustment device 5 includes two hollow frames 51, which are respectively located on both sides of the base plate 1. A slider 52 is fixedly connected to both sides of the base plate 1. The inner wall of the hollow frame 51 is slidably connected, and two hollow seats 55 are fixedly connected to the surface of the hollow frame 51. A screw 53 is rotatably connected to the inner wall of the hollow seat 55. A hole is opened on the side of the slider 52 near the screw 53. The screw 53 is threadedly connected to the inner wall of the hole. A handle 56 is fixedly connected to one end of the screw 53. The handle 56 is composed of a disc and a cylindrical grip. By setting the handle 56 in conjunction with the screw 53, the slider 52 can be controlled to slide in the hollow frame 51, which facilitates the adjustment and movement of the equipment and allows drilling and exploration at different locations.

[0033] according to Figure 3 As shown: Specifically, a gear 54 is fixedly connected to the surface of screw 53, and two slide rods 59 are fixedly connected to the surface of hollow frame 51 near handle 56. The surfaces of the two slide rods 59 are slidably connected to locking teeth 58, which mesh with gear 54. By cooperating with gear 54, screw 53 can be restricted after the equipment is adjusted, thereby improving the overall stability of the equipment.

[0034] according to Figure 3 As shown: Specifically, a first spring 510 is sleeved on the surface of the slide bar 59. The two ends of the first spring 510 are fixedly connected to the surfaces of the slide bar 59 and the locking tooth 58, respectively. By setting the first spring 510, it is convenient to control the locking tooth 58 to reset, improve the stability of the locking tooth 58, and at the same time improve the binding effect of the locking tooth 58 on the gear 54.

[0035] according to Figure 3 As shown: Specifically, a pedal 57 is fixedly connected to the surface of the tooth 58. The pedal 57 is composed of an L-shaped rod and a rectangular plate. By setting the pedal 57, it is convenient for manual operation to step on and rotate the handle 56 for adjustment.

[0036] according to Figure 4-5-6 As shown: Specifically, a stabilizing device 6 is provided on the surface of the hollow frame 51. The stabilizing device 6 includes four support plates 68. Each of the four support plates 68 is fixedly connected to the surface of the hollow frame 51 in pairs. The surface of the support plate 68 has through holes, and the inner wall of the through holes is slidably connected to a pin 61. The inner wall of the pin 61 has a rectangular groove, and the inner walls of both sides of the rectangular groove have three round holes. The inner walls of the round holes are slidably connected to a positioning pin 65. The surface of the pin 61 has a connecting hole, and the inner wall of the connecting hole... The wall is rotatably connected to a screw 64, and a pressing block 67 is slidably connected to the inner wall of the rectangular groove in the pin 61. The surface of the pressing block 67 has a hole 2. The screw 64 is threadedly connected to the inner wall of the hole 2 on the surface of the pressing block 67. By rotating the screw 64, the pressing block 67 can be moved. The pressing block 67 can press the positioning pin 65, so that the positioning pin 65 passes through the round hole on the surface of the pin 61, thus completing the positioning of the entire equipment and reducing the possibility of the equipment being displaced due to vibration during drilling, which affects the drilling process.

[0037] according to Figure 5-6 As shown: Specifically, a second spring 66 is sleeved on the surface of the positioning pin 65. The two ends of the second spring 66 are fixedly connected to the inner wall of the rectangular groove in the positioning pin 65 and the insertion pin 61, respectively. By setting the second spring 66, it is easy to control the positioning pin 65 to reset, which is convenient for subsequent removal.

[0038] according to Figure 4-5 As shown: Specifically, a knob 63 is fixedly connected to one end of the screw 64, and two auxiliary plates 62 are fixedly connected to the surface of the pin 61. By setting the knob 63, it is easy to control the rotation of the screw 64, and at the same time, the auxiliary plates 62 can facilitate the insertion of the pin 61, improving the overall ease of use.

[0039] according to Figure 7 As shown: Specifically, an auxiliary device 7 is provided on the surface of the base plate 1. The auxiliary device 7 includes a hollow sleeve 71, which is fixedly connected to the surface of the base plate 1. A support rod 72 is rotatably connected to the inner wall of the hollow sleeve 71. A fixing rod 75 is fixedly connected to one end of the support rod 72. A circular hole is opened in the inner wall of the hollow sleeve 71. A screw rod 73 is rotatably connected to the inner wall of the circular hole. A hole 3 is opened on the surface of the support rod 72. The screw rod 73 is threadedly connected to the inner wall of the hole 3. By rotating the screw rod 73, the screw rod 73 drives the support rod 72 and the fixing rod 75 to move in the hollow sleeve 71. The fixing rod 75 will squeeze the belt, thereby adjusting the belt tension and reducing the situation where the belt is too loose, resulting in poor power during drilling.

[0040] according to Figure 7-8 As shown: Specifically, a roller 76 is rotatably connected to the surface of the fixed rod 75. The roller 76 is in contact with the surface of the belt. By setting the roller 76, the wear on the belt can be reduced and the overall usability can be improved.

[0041] according to Figure 7 As shown: Specifically, one end of the screw 3 73 is fixedly connected to an adjusting member 74. By setting the adjusting member 74, it is easy to control the rotation of the screw 3 73 and to easily adjust the tightness.

[0042] The overall mechanism achieves the following effect: The drive unit 2 transmits power to the machine body 3, assembling the drill rod onto the connecting rod for drilling operations. By setting the adjustment device 5, when the equipment needs to be used, the worker steps on the pedal 57. The pedal 57 drives the chuck 58 to move within the slide rod 59. The first spring 510 deforms under force, generating elasticity, and the chuck 58 loses its restraining effect on the gear 54. By turning the handle 56, the handle 56 drives the screw 53 to rotate. The screw 53 drives the slider 52 to slide and adjust its position on the hollow frame 51 for drilling. After adjustment, the worker... When the user releases the foot from pedal 57, the first spring 510 drives the retaining tooth 58 to reset. The retaining tooth 58 abuts against the inner wall of the gear 54, thus completing the adjustment. By setting the adjustment device 5, it is convenient to adjust the position of the equipment. This can effectively reduce the inefficiency of the existing equipment after assembly and drilling, which is usually a fixed structure and requires drilling and surveying at different locations. Due to the bulky nature of the equipment, it is inconvenient to operate when moving it within a small range, and it also increases the workload of the workers. This reduces the inefficiency of the equipment when surveying different locations, thereby improving the overall usability of the equipment.

[0043] By setting up the stabilizing device 6, when the equipment needs to be used, the manual operator can insert the pin 61 into the soil and rock through the auxiliary plate 62. After insertion, the knob 63 and the screw 64 are rotated. The screw 64 drives the pressing block 67 to slide in the rectangular groove of the pin 61. The pressing block 67 presses the positioning pin 65, causing the positioning pin 65 to move out of the round hole in the pin 61 and be inserted into the soil and rock. The second spring 66 is stressed, thus completing the positioning of the equipment. By setting up the stabilizing device 6, it is easy to place the equipment stably. This can effectively reduce the phenomenon that the equipment is prone to vibration during drilling, which can cause the equipment to shift. It reduces the possibility of the equipment shifting the drill rod and being damaged during drilling, thereby improving the overall stability of the equipment.

[0044] By setting up auxiliary device 7, when the equipment needs to be used, rotating adjustment component 74 drives screw 73 to rotate. Screw 73 drives support rod 72 to slide in hollow sleeve 71. Support rod 72 drives fixed rod 75 and roller 76 to squeeze the belt, thereby adjusting the belt tension. When the belt rotates, it drives roller 76 to rotate on fixed rod 75, which can reduce wear. By setting up auxiliary device 7, it is convenient to use auxiliary equipment. It can effectively reduce the phenomenon that the belt is prone to becoming too loose when the equipment is used. This is because the power is transmitted by the belt and rotates for a long time, which leads to poor power transmission effect and affects drilling efficiency. In this way, the overall practicality of the equipment is improved.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drilling device for geotechnical engineering investigation, characterized in that: The system includes a base plate (1), a driver (2) is mounted on top of the base plate (1), and an organism (3) is mounted on the upper surface of the base plate (1). The output end of the driver (2) is connected to the input end of the organism (3) via a belt. A connector (4) is mounted on one side of the organism (3). An adjustment device (5) is mounted on the surface of the base plate (1). The adjustment device (5) includes a hollow frame (51). There are two hollow frames (51), which are located on both sides of the base plate (1). A slider (52) is fixedly connected to both sides of the base plate (1). The slider (52) is slidably connected to the inner wall of the hollow frame (51). Two hollow seats (55) are fixedly connected to the surface of the hollow frame (51). A screw (53) is rotatably connected to the inner wall of the hollow seat (55). A hole is opened on the side of the slider (52) near the screw (53). The screw (53) is threaded to the inner wall of the hole. A handle (56) is fixedly connected to one end of the screw (53). The handle (56) is composed of a disc and a cylindrical grip. A stabilizing device (6) is provided on the surface of the hollow frame (51). The stabilizing device (6) includes a support plate (68). There are four support plates (68). The four support plates (68) are fixedly connected to the surface of the hollow frame (51) on one side in pairs. Next, the surface of the support plate (68) is provided with a through hole, and a pin (61) is slidably connected to the inner wall of the through hole. The inner wall of the pin (61) is provided with a rectangular groove, and three round holes are provided on both sides of the inner wall of the rectangular groove. A positioning pin (65) is slidably connected to the inner wall of the round hole. A connecting hole is provided on the surface of the pin (61), and a screw (64) is rotatably connected to the inner wall of the connecting hole. An extrusion block (67) is slidably connected to the inner wall of the rectangular groove in the pin (61). A hole (64) is provided on the surface of the extrusion block (67), and the screw (64) is threadedly connected to the inner wall of the hole (64) on the surface of the extrusion block (67). A second spring (66) is sleeved on the surface of the positioning pin (65). The two ends of the second spring (66) are fixedly connected to the inner wall of the rectangular groove in the positioning pin (65) and the pin (61), respectively. An auxiliary device (7) is provided on the surface of the base plate (1). The auxiliary device (7) includes a hollow sleeve (71). The hollow sleeve (71) is fixedly connected to the surface of the base plate (1). A support rod (72) is rotatably connected to the inner wall of the hollow sleeve (71). A fixing rod (75) is fixedly connected to one end of the support rod (72). A circular hole is opened on the inner wall of the hollow sleeve (71). A screw rod (73) is rotatably connected to the inner wall of the circular hole. A hole is opened on the surface of the support rod (72). The screw rod (73) is threadedly connected to the inner wall of the hole.

2. The drilling device for geotechnical engineering investigation according to claim 1, characterized in that: A gear (54) is fixedly connected to the surface of the screw (53), and two slide rods (59) are fixedly connected to the surface of the hollow frame (51) near the handle (56). The surfaces of the two slide rods (59) are slidably connected with locking teeth (58), and the locking teeth (58) mesh with the gear (54).

3. The drilling device for geotechnical engineering investigation according to claim 2, characterized in that: A first spring (510) is sleeved on the surface of the slide rod (59), and the two ends of the first spring (510) are fixedly connected to the surfaces of the slide rod (59) and the locking teeth (58), respectively.

4. The drilling device for geotechnical engineering investigation according to claim 2, characterized in that: The surface of the tooth (58) is fixedly connected to a pedal (57), which is formed by combining an L-shaped rod and a rectangular plate.

5. A drilling device for geotechnical engineering investigation according to claim 1, characterized in that: A knob (63) is fixedly connected to one end of the screw (64), and two auxiliary plates (62) are fixedly connected to the surface of the pin (61).

6. The drilling device for geotechnical engineering investigation according to claim 5, characterized in that: The surface of the fixed rod (75) is rotatably connected to a roller (76), and the roller (76) is in contact with the surface of the belt.

7. A drilling device for geotechnical engineering investigation according to claim 6, characterized in that: One end of the screw three (73) is fixedly connected to an adjusting member (74).

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