Underground continuous wall milling and drilling device

Abstract

The application relates to the technical field of underground engineering construction equipment, in particular to a diaphragm wall milling and drilling device which comprises a main frame with a rectangular frame structure, two milling and drilling assemblies, a reciprocating driving mechanism and an impact assembly; a hoisting equipment connecting seat is arranged at the top of the main frame, the reciprocating driving mechanism is arranged in the main frame and comprises meshed gear transmission structures and sliding transmission structures, the two milling and drilling assemblies are driven to move transversely relative to or away from each other; the impact assembly is located at the bottom of the main frame and in the middle of the two milling and drilling assemblies, and the transmission structure of the impact assembly is meshed with the gear transmission structure of the reciprocating driving mechanism. The milling and drilling assembly is provided with a double-output-shaft hydraulic motor, and output ends of the hydraulic motor are horizontally arranged in front of and behind the milling and drilling cutter. The device realizes collaborative work of milling and drilling and impact, improves the efficiency of hard strata, simplifies the structure, and reduces the cost and maintenance difficulty.

Description

Technical Field

[0001] This application relates to the field of underground engineering construction equipment technology, and in particular to a milling and drilling device for underground continuous walls. Background Technology

[0002] In the construction of diaphragm walls, milling and drilling equipment is the core equipment for trenching the wall, and its operating efficiency and adaptability directly determine the construction progress and project quality. Currently, existing diaphragm wall milling and drilling equipment generally suffers from the technical problem of "a single operating mode being difficult to adapt to hard strata." Specifically, most existing milling and drilling equipment only has the single function of milling or drilling. When facing hard strata such as moderately weathered rock and slightly weathered rock, simple milling and drilling operations must overcome extremely high formation resistance. This not only leads to rapid wear and frequent replacement of the drill bit, increasing construction costs, but also results in low operating efficiency due to insufficient cutting force. In severe cases, the milling and drilling equipment may even "get stuck," affecting the construction progress.

[0003] To address the problems mentioned in the background art, a milling and drilling device for underground continuous walls has been invented. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing diaphragm wall milling and drilling devices, such as "low efficiency in hard strata and poor coordination between milling and impact", and to provide a diaphragm wall milling and drilling device that improves the efficiency of operation in hard strata by optimizing the structural design and using the power-sharing impact component and the milling and drilling component to form a coordinated operation.

[0005] The underground continuous wall milling and drilling device provided in this application adopts the following technical solution: it includes a main frame, two milling and drilling components, a reciprocating drive mechanism, and an impact component; The top of the main frame is provided with a connecting seat for connecting lifting equipment; Each of the milling and drilling components is used for milling and drilling operations; The reciprocating drive mechanism is located inside the main frame and is used to drive the two milling and drilling components to reciprocate in opposite or opposite directions along the lateral direction. It includes a meshing gear transmission structure and a sliding transmission structure connected to the milling and drilling components. The impact assembly is located at the bottom of the main frame and between the two milling and drilling assemblies, and is used for impact operations. Its transmission structure meshes with the gear transmission structure of the reciprocating drive mechanism.

[0006] Optionally, the gear transmission structure of the reciprocating drive mechanism includes a first gear and a second gear that mesh with each other and are both rotatably connected within the main frame. The first gear is connected to a drive motor disposed within the main frame.

[0007] Optionally, the sliding transmission structure includes a sliding frame that can slide laterally within the main frame and eccentric columns disposed on both sides of the second gear. The sliding frame has a vertical groove, and the eccentric columns are located within the vertical groove. The two eccentric columns are respectively located on the upper and lower sides of the second gear. When the second gear rotates, it drives the two sliding frames to move in opposite directions. The sliding frames are connected to the milling and drilling assembly.

[0008] Optionally, each of the milling and drilling assemblies includes a drive component and a milling and drilling cutter. The drive component is mounted on a sliding frame and is used to drive the milling and drilling cutter to rotate. The two milling and drilling assemblies are symmetrically arranged at the bottom of the main frame.

[0009] Optionally, the driving component is a hydraulic motor, which is a dual-output shaft hydraulic motor, and its two output ends are respectively connected to milling cutters to drive the two milling cutters to rotate synchronously.

[0010] Optionally, the impact assembly includes a transmission gear, a connecting rod, an impact rod, and an impact drill bit. One end of the connecting rod is eccentrically connected to the transmission gear, the impact rod is connected to the other end of the connecting rod, the impact drill bit is disposed at the bottom end of the impact rod, and the transmission gear rotates within the main frame and meshes with a second gear.

[0011] Optionally, the bottom of the main frame is provided with a guide hole, and the impact rod passes through the guide hole and slides in cooperation with the guide hole.

[0012] In summary, this application includes the following beneficial technical effects: 1. Improve the efficiency of working on hard strata: This device integrates milling and drilling components and impact components. The impact component is located between the two milling and drilling components. It can impact and break up hard strata before or simultaneously with milling and drilling operations, reduce milling and drilling resistance, reduce milling and drilling cutter wear, and increase milling and drilling speed, effectively solving the problem of low efficiency in working on hard strata.

[0013] 2. Simplified structure and reduced cost: The reciprocating drive mechanism and the impact component share power through gear meshing, eliminating the need for an independent drive system for the impact component. This reduces the number of drive components, simplifies the overall structure of the device, and lowers the manufacturing cost and energy consumption. Meanwhile, the milling width adjustment relies on the cooperation between the second gear and the eccentric column. Compared with lead screw or hydraulic cylinder adjustment, the structure is simpler, the failure rate is lower, and the maintenance cost is significantly reduced. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the device. Figure I ; Figure 2 This is a schematic diagram of the overall structure of the device. Figure II ; Figure 3 This is the front view of the device; Figure 4 This is a side view of the device; Figure 5 This is a schematic diagram of the internal structure of the main frame of this device; The components are as follows: 1. Main frame; 2. Milling and drilling assembly; 3. Reciprocating drive mechanism; 4. Impact assembly; 5. Connecting seat; 6. Gear transmission structure; 7. Sliding transmission structure; 8. First gear; 9. Second gear; 10. Drive motor; 11. Sliding frame; 12. Eccentric column; 13. Vertical slide groove; 14. Drive component; 15. Milling and drilling cutter; 16. Hydraulic motor; 17. Transmission gear; 18. Connecting rod; 19. Impact rod; 20. Impact drill bit; 21. Guide hole. Detailed Implementation

[0015] The present application will be further described in detail below with reference to the accompanying drawings. In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model and 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 the present utility model.

[0016] Reference Figure 1 , Figure 2 , Figure 4 One embodiment shown is as follows: The underground continuous wall milling and drilling device includes a main frame 1, two milling and drilling components 2, a reciprocating drive mechanism 3, and an impact component 4. At the top center of the main frame 1, a connecting seat 5 for connecting lifting equipment is detachably connected by bolts. The top of the connecting seat 5 has a hanging hole adapted to the hook of the lifting equipment. The axis of the hanging hole coincides with the vertical center line of the main frame 1, ensuring that the device is balanced under force during lifting and preventing tilting.

[0017] Two milling and drilling components 2 are respectively set on the left and right sides of the bottom of the main frame 1 to realize milling and drilling operations. The two milling and drilling components 2 are symmetrically distributed about the vertical center line of the main frame 1 to ensure uniform stress on the stratum during subsequent operations. The reciprocating drive mechanism 3 is fixedly installed in the middle area inside the main frame 1 by bolts. Its position is directly below the top connecting seat 5 of the main frame 1. The reciprocating drive mechanism 3 is used to drive the two milling and drilling components 2 to move back and forth relative to each other along the lateral (i.e., left and right) direction of the main frame 1. The reciprocating drive mechanism 3 includes a meshing gear transmission structure 6 and a sliding transmission structure 7 connected to the milling and drilling components 2. The gear transmission structure 6 is rotatably connected to the inner side wall of the main frame 1 through a bearing seat. The two ends of the sliding transmission structure 7 are respectively fixedly connected to the two milling and drilling components 2 by bolts to ensure that the power can be stably transmitted to the milling and drilling components 2. The impact assembly 4 is fixedly installed at the bottom of the main frame 1 by bolts, and the vertical center line of the impact assembly 4 coincides with the vertical center line of the main frame 1. At the same time, the impact assembly 4 is located in the middle of the two milling and drilling assemblies 2, and its lateral sides are equidistant from the two milling and drilling assemblies 2. The impact assembly 4 is used to realize the impact operation. Its transmission structure is connected to the gear transmission structure 6 of the reciprocating drive mechanism 3 through gear meshing, so as to ensure that the power of the reciprocating drive mechanism 3 can be synchronously transmitted to the impact assembly 4.

[0018] The implementation principle of the above embodiment is as follows: The main frame 1 serves as the basic support structure of the entire device. It is connected to the lifting equipment through the top connecting seat 5 to realize the movement and positioning of the device in the construction area; During the process of driving the milling and drilling assembly 2, the reciprocating drive mechanism 3 transmits power to the impact assembly 4 through gear meshing, so that the impact assembly 4 performs impact operations synchronously. The impact assembly 4 is located between the two milling and drilling assemblies 2, which can first break the intermediate strata, reduce the milling resistance of the milling and drilling assembly 2, realize the coordinated operation of milling and drilling and impact, and improve construction efficiency.

[0019] Reference Figure 4 , Figure 5 One embodiment is shown as follows: In the reciprocating drive mechanism 3 within the main frame 1, its gear transmission structure 6 includes a meshing first gear 8 and a second gear 9, both of which are rotatably connected within the main frame 1. Simultaneously, the first gear 8 is connected to a drive motor 10 disposed within the main frame 1. Specifically, a motor mounting base is bolted to the left side wall inside the main frame 1. The drive motor 10 is detachably connected to the motor mounting base via bolts. The output shaft of the drive motor 10 faces the inner side of the main frame 1, and a protective cover can be installed on the outer side of the drive motor 10. The axis of the output shaft is arranged transversely along the main frame 1. The first gear 8 is fixedly connected to the output shaft of the drive motor 10 via a flat key, and the axis of the first gear 8 coincides with the axis of the output shaft of the drive motor 10, ensuring that the drive motor 10 can drive the first gear 8 to rotate synchronously when started.

[0020] Inside the main frame 1, two symmetrically distributed bearing seats are fixedly installed in the middle position by bolts. The axes of the two bearing seats are both set along the transverse direction of the main frame 1, and the axes of the two bearing seats are on the same horizontal plane as the axis of the first gear 8. A transmission shaft is inserted through the center of the second gear 9 and is rotatably connected to the two bearing seats, so that the second gear 9 can rotate freely around the axis of the transmission shaft. The tooth surface of the second gear 9 meshes with the tooth surface of the first gear 8.

[0021] The implementation principle of the above embodiment is as follows: After the drive motor 10 starts, its output shaft drives the first gear 8 to rotate. Since the first gear 8 meshes with the second gear 9, the rotation of the first gear 8 is transmitted to the second gear 9 through the force between the tooth surfaces, causing the second gear 9 to rotate around the axis of the transmission shaft.

[0022] Reference Figure 5 One embodiment shown is as follows: the sliding transmission structure 7 of the reciprocating drive mechanism 3 includes a sliding frame 11 that can slide laterally within the main frame 1 and eccentric columns 12 disposed on both sides of the second gear 9. The sliding frame 11 is provided with a vertical slide groove 13, and the eccentric columns 12 are located in the vertical slide groove 13. The two eccentric columns 12 are respectively located on the upper and lower sides of the second gear 9. When the second gear 9 rotates, it drives the two sliding frames 11 to move in opposite directions. The sliding frame 11 is connected to the milling and drilling assembly 2.

[0023] Specifically, there are two sliding frames 11, located on the left and right sides of the main frame 1, respectively. The two sliding frames 11 are symmetrically distributed about the vertical center line of the main frame 1. Sliding guide rails extending in the horizontal (left-right direction) are respectively provided on the front and rear side walls inside the main frame 1. The cross-section of the sliding guide rails is T-shaped, and the sliding frames 11 on the left and right sides are adapted to the sliding guide rails on the front and rear side walls, respectively. The front and rear ends of the left sliding frame 11 are slidably engaged with the sliding guide rails on the left side section of the front side wall and the left side section of the rear side wall of the main frame 1 through T-shaped sliders. The front and rear ends of the right sliding frame 11 are slidably engaged with the sliding guide rails on the right side section of the front side wall and the right side section of the rear side wall of the main frame 1 through T-shaped sliders. This ensures that the two sliding frames 11 can only slide horizontally in the horizontal direction, and the sliding direction is completely consistent with the horizontal direction of the main frame 1, without any risk of deviation or jamming.

[0024] On the end face of the second gear 9, two eccentric columns 12 are fixedly connected by welding. The two eccentric columns 12 are symmetrically distributed about the axis of the second gear 9 and are located on the upper and lower sides of the second gear 9 respectively (the upper eccentric column 12 is located directly above the axis of the second gear 9, and the lower eccentric column 12 is located directly below the axis of the second gear 9). The axis of the eccentric column 12 is parallel to the axis of the second gear 9, and the eccentricity (the distance between the axis of the eccentric column 12 and the axis of the second gear 9) is 20-50mm. This eccentricity directly determines the lateral movement stroke of the sliding frame 11. Vertical grooves 13 are respectively provided at the middle of the right side wall of the left sliding frame 11 and the middle of the left side wall of the right sliding frame 11. The width of the vertical grooves 13 is adapted to the diameter of the eccentric column 12. The eccentric column 12 above the second gear 9 passes through the vertical groove 13 of the right sliding frame 11, and the eccentric column 12 below passes through the vertical groove 13 of the left sliding frame 11. The eccentric column 12 can slide freely vertically in the vertical groove 13 to avoid interfering with the lateral movement of the sliding frame 11. The sliding frame 11 and the milling and drilling assembly 2 are detachably connected by bolts.

[0025] The implementation principle of the above embodiment is as follows: When the second gear 9 rotates clockwise under the drive of the drive motor 10 and the first gear 8, the upper eccentric column 12 on the second gear 9 moves in a circular motion with the gear, and its lateral movement direction is to the right. It pushes the right sliding frame 11 to move horizontally to the right through the vertical slide groove 13 of the right sliding frame 11. At the same time, the lateral movement direction of the circular motion of the lower eccentric column 12 is to the left. It pushes the left sliding frame 11 to move horizontally to the left through the vertical slide groove 13 of the left sliding frame 11. That is, the two sliding frames 11 move in opposite directions, and the distance between the milling and drilling components 2 increases. When the second gear 9 rotates counterclockwise, the lateral movement direction of the upper eccentric column 12 is to the left and the lateral movement direction of the lower eccentric column 12 is to the right. It pushes the two sliding frames 11 to move in opposite directions, and the distance between the milling and drilling components 2 decreases.

[0026] Reference Figure 1 One embodiment shown is as follows: Each milling and drilling assembly 2 includes a drive component 14 and a milling cutter 15. The drive component 14 is mounted on a sliding frame 11 and is used to drive the milling cutter 15 to rotate. The two milling and drilling assemblies 2 are symmetrically arranged at the bottom of the main frame 1. The milling cutter 15 is detachably connected to the output end of the drive component 14 via a flange. The flanges are fixed together by bolts, and the axis of the milling cutter 15 coincides with the axis of the output end of the drive component 14, ensuring that the drive component 14 can drive the milling cutter 15 to rotate coaxially. The milling cutter 15 has a disc-shaped structure, and its circumference is evenly distributed with carbide cutting tips (the cutting tip material is preferably WC-Co alloy, with a hardness of HRA88-90, which has excellent wear resistance and impact resistance and is suitable for milling hard strata). The diameter of the milling cutter 15 is selected according to the trench width of the diaphragm wall to ensure that it can meet the milling and drilling requirements of different trench widths.

[0027] The implementation principle of the above embodiment is as follows: After the drive component 14 is started, its output end drives the milling drill 15 to rotate at high speed around its own axis. The carbide cutter head on the circumferential surface of the milling drill 15 contacts the formation and realizes the milling or drilling of the formation through the cutting action. At the same time, the symmetrically arranged milling and drilling components 2 can ensure the overall force balance of the device during the milling process, avoid the device deviation caused by excessive force on one side, and improve the stability of operation.

[0028] Reference Figure 5 One embodiment shown is as follows: the driving component 14 is a hydraulic motor 16, and the hydraulic motor 16 is a dual-output shaft hydraulic motor 16. The two output ends are arranged horizontally front to back and are respectively connected to milling cutters 15 to drive the two milling cutters 15 to rotate synchronously. Specifically, the hydraulic motor 16 is fixedly installed at the bottom of the sliding frame 11 by bolts, and the housing of the hydraulic motor 16 is completely in contact with the bottom of the sliding frame 11. The front-back direction of the housing is consistent with the front-back direction of the main frame 1. The hydraulic motor 16 of the left milling assembly 2 is installed at the bottom of the left sliding frame 11, and the hydraulic motor 16 of the right milling assembly 2 is installed at the bottom of the right sliding frame 11. The installation height and front-back position of the two hydraulic motors 16 are completely symmetrical. The hydraulic motor 16 has a dual output shaft structure with two horizontally arranged output ends (output shafts). The axes of the two output shafts are collinear and extend along the front-rear direction of the main frame 1 (perpendicular to the sliding direction of the sliding frame 11). The front end of the front output shaft extends to the front of the hydraulic motor 16 housing, and the rear end of the rear output shaft extends to the rear of the hydraulic motor 16 housing. The axes of the front and rear output shafts are on the same horizontal plane, ensuring that the milling drill 15 connected later can operate at the same horizontal height.

[0029] The implementation principle of the above embodiment is as follows: the external hydraulic system supplies oil to the oil inlet of the hydraulic motor 16 through a high-pressure oil pipe. The hydraulic oil drives the rotor inside the motor to rotate around the output shaft axis. Since the dual output shafts are fixed coaxially with the rotor, the rotor drives the front and rear output shafts to rotate synchronously at the same speed. The front and rear output shafts drive the front and rear milling cutters 15 to rotate synchronously through the flange. The carbide cutting head on the circumference of the milling cutter 15 contacts the formation at high speed. Through the combined action of "cutting + grinding", the formation is broken to form a milled groove segment that meets the requirements.

[0030] Reference Figure 2 , Figure 5One embodiment shown is as follows: The impact assembly 4 includes a transmission gear 17, a connecting rod 18, an impact rod 19, and an impact drill bit 20. One end of the connecting rod 18 is eccentrically connected to the transmission gear 17, and the impact rod 19 is connected to the other end of the connecting rod 18. The impact drill bit 20 is located at the bottom end of the impact rod 19. The transmission gear 17 rotates within the main frame 1 and meshes with the second gear 9. Specifically, at the bottom center of the main frame 1, located precisely between the two sliding frames 11 and directly above the hydraulic motor 16, two symmetrically distributed bearing seats are fixedly installed with bolts. The axes of the two bearing seats are arranged laterally along the main frame 1 and are on the same horizontal plane as the axis of the second gear 9. A transmission shaft passes through the center of the transmission gear 17, and the front and rear ends of the transmission shaft are rotatably connected to the two bearing seats through rolling bearings. The transmission gear 17 is located directly below the second gear 9, and the tooth surfaces of the transmission gear 17 and the second gear 9 mesh with each other, ensuring that the transmission gear 17 and the second gear 9 rotate at the same speed but in opposite directions. An eccentric pin is fixedly connected to the front end face of the transmission gear 17 by welding. The axis of the eccentric pin is parallel to the axis of the transmission gear 17. The eccentricity (the distance between the axis of the eccentric pin and the axis of the transmission gear 17) is set according to the impact stroke requirements of the impact rod 19. The larger the eccentricity, the larger the impact stroke. The outer surface of the eccentric pin is chrome-plated to improve wear resistance. One end of the connecting rod 18 has a round hole that matches the eccentric pin, ensuring that the connecting rod 18 can rotate flexibly around the eccentric pin without jamming. The other end of the connecting rod 18 is hinged to the top of the impact rod 19 by a pin. The axis of the pin is parallel to the axis of the eccentric pin, and both ends of the pin are fixed by cotter pins to prevent the connecting rod 18 from separating from the impact rod 19. A vertical guide hole 21 is provided at the middle position of the bottom of the main frame 1. The impact rod 19 passes through the guide hole 21, and the outer wall of the impact rod 19 slides with the inner wall of the guide hole 21. The top end is hinged to the connecting rod 18, and the bottom end extends to the bottom of the main frame 1. The bottom end of the impact rod 19 is connected to the impact drill bit 20 by threads. The impact drill bit 20 is made of cemented carbide.

[0031] The implementation principle of the above embodiment is as follows: When the second gear 9 rotates, it drives the transmission gear 17 to rotate synchronously through tooth surface meshing. The eccentric pin on the transmission gear 17 moves in a circular motion with the gear. Since one end of the connecting rod 18 is hinged to the eccentric pin and the other end is hinged to the impact rod 19, the circular motion of the eccentric pin is converted into the up-and-down reciprocating motion of the impact rod 19 through the connecting rod 18. Under the constraint of the guide hole 21, the impact rod 19 can only move in a straight line in the vertical direction, driving the impact drill bit 20 at the bottom to repeatedly impact the stratum between the two milling and drilling components 2. First, the hard stratum is broken into small pieces, and then the milling drill bit 15 set horizontally at the front and rear removes the broken stratum by milling, forming a collaborative operation mode of "impact crushing + milling". Compared with single milling and drilling operation, the construction efficiency of hard stratum is improved, and the wear rate of the milling drill bit 15 can be effectively reduced.

[0032] The working principle of this device is as follows: The device is fixed to the lifting equipment through the top connecting seat 5 of the main frame 1, realizing overall movement and positioning. During operation, the drive motor 10 starts, driving the first gear 8 of the reciprocating drive mechanism 3 to rotate, and the first gear 8 meshes with and drives the second gear 9 to rotate. The upper and lower eccentric columns 12 of the second gear 9 are respectively embedded in the vertical sliding grooves 13 of the left and right sliding frames 11, converting the rotation into the lateral opposite movement of the sliding frames 11.

[0033] Simultaneously, the second gear 9 meshes with and drives the transmission gear 17 of the impact assembly 4 to rotate. The eccentric pin of the transmission gear 17 drives the impact rod 19 to reciprocate up and down along the guide hole 21 of the main frame 1 via the connecting rod 18, and the impact drill bit 20 impacts the intermediate stratum. In the milling and drilling assembly 2, the dual-output shaft hydraulic motor 16 starts, and the front and rear output shafts drive the milling drill bit 15 to rotate synchronously, cutting and breaking the stratum, forming a coordinated operation of "impact pretreatment + milling and drilling cutting", which efficiently completes the trenching of the underground continuous wall.

[0034] The working principle of this device has been explained through the above embodiments. These embodiments only illustrate several implementation methods of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A milling and drilling device for diaphragm walls, characterized in that: It includes a main frame (1), two milling and drilling assemblies (2), a reciprocating drive mechanism (3), and an impact assembly (4). The top of the main frame (1) is provided with a connecting seat (5) for connecting lifting equipment; Each of the milling and drilling components (2) is used for milling and drilling operations; The reciprocating drive mechanism (3) is located inside the main frame (1) and is used to drive the two milling and drilling components (2) to reciprocate in opposite or opposite directions in the lateral direction. It includes a meshing gear transmission structure (6) and a sliding transmission structure (7) connected to the milling and drilling components (2). The impact component (4) is located at the bottom of the main frame (1) and between the two milling and drilling components (2) for impact operation. Its transmission structure meshes with the gear transmission structure (6) of the reciprocating drive mechanism (3).

2. The underground continuous wall milling and drilling device according to claim 1, characterized in that: The gear transmission structure (6) of the reciprocating drive mechanism (3) includes a first gear (8) and a second gear (9) that mesh with each other and are rotatably connected in the main frame (1). The first gear (8) is connected to the drive motor (10) provided in the main frame (1).

3. The underground continuous wall milling and drilling device according to claim 2, characterized in that: The sliding transmission structure (7) includes a sliding frame (11) that can slide laterally within the main frame (1) and eccentric columns (12) arranged on both sides of the second gear (9). The sliding frame (11) has a vertical groove (13) and the eccentric column (12) is located in the vertical groove (13). The two eccentric columns (12) are located on the upper and lower sides of the second gear (9) respectively. When the second gear (9) rotates, it drives the two sliding frames (11) to move in opposite directions. The sliding frame (11) is connected to the milling and drilling assembly (2).

4. The underground continuous wall milling and drilling device according to claim 3, characterized in that: Each of the milling and drilling assemblies (2) includes a drive component (14) and a milling cutter (15). The drive component (14) is mounted on a sliding frame (11) and is used to drive the milling cutter (15) to rotate. The two milling and drilling assemblies (2) are symmetrically arranged at the bottom of the main frame (1).

5. The underground continuous wall milling and drilling device according to claim 4, characterized in that: The driving component (14) is a hydraulic motor (16), which is a dual-output shaft hydraulic motor (16), and its two output ends are respectively connected to milling cutters (15) to drive the two milling cutters (15) to rotate synchronously.

6. The underground continuous wall milling and drilling device according to claim 2, characterized in that: The impact assembly (4) includes a transmission gear (17), a connecting rod (18), an impact rod (19), and an impact drill bit (20). One end of the connecting rod (18) is eccentrically connected to the transmission gear (17), and the impact rod (19) is connected to the other end of the connecting rod (18). The impact drill bit (20) is located at the bottom end of the impact rod (19). The transmission gear (17) rotates within the main frame (1) and meshes with the second gear (9).

7. The underground continuous wall milling and drilling device according to claim 6, characterized in that: The bottom of the main frame (1) is provided with a guide hole (21), and the impact rod (19) passes through the guide hole (21) and slides in cooperation with the guide hole (21).

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