A multi-point tunneling device for coal mining

Abstract

The utility model relates to the technical field of coal mine machinery provides a kind of multi-point tunneling device of coal mining, including device main body frame;At least one electric telescopic link fixedly installed in the bottom of device main body frame;First equipment bin connected by the drive shaft of electric telescopic link and can be moved along vertical direction;Second equipment bin is fixedly installed in the top of first equipment bin;First horizontal adjustment and mining assembly is arranged in the inside of first equipment bin, and first horizontal adjustment and mining assembly are used to drive at least two first mining drill bit move along horizontal direction and carry out mining operation;And, second angle adjustment and mining assembly are arranged on the second equipment bin.The utility model can realize the independent, accurate adjustment of multiple drill bits in height, horizontal spacing and angle, form three-dimensional collaborative multi-point tunneling capacity, significantly improve the flexibility, adaptability and efficiency of mining operation.

Description

Technical Field

[0001] This utility model relates to the field of coal mining machinery technology, and in particular to a multi-point tunneling device for coal mining. Background Technology

[0002] Coal mine roadway excavation is a crucial step in coal mining, and its efficiency directly impacts mine production continuity and mining costs. To improve excavation efficiency, multi-point tunneling devices have emerged, which integrate multiple drill bits on a single device to achieve simultaneous drilling operations, thereby accelerating the excavation speed. Various improvements to multi-point tunneling devices have been attempted in existing technologies.

[0003] Chinese patent discloses a multi-point tunneling device for coal mining, publication number CN 217270179 U. The paper describes a device comprising a box, a rotating device mounted on top of the box, a first drill bit fixedly connected to the output shaft of a first servo motor, and a circular sleeve fixedly connected to the outer wall of the first servo motor. This invention, through the cooperation between the box and the rotating device, allows the circular sleeve to rotate downwards at a suitable angle within the corresponding vertical plate via screws on both sides. This tilts the first drill bit on the first servo motor, causing the nuts on both sides to move inwards on their respective screws and press against the corresponding vertical plate, fixing the position of the first drill bit. At this point, the head of the first drill bit forms a triangle with the heads of two second drill bits below it. The two second drill bits drill holes, while the first drill bit drills through the coal mine, enabling rapid material feeding and accelerating the tunneling speed. This solves the problem that existing multi-point tunneling devices for coal mining, which are mostly used for forward mining and can only drill at multiple points, cannot feed materials quickly.

[0004] However, the aforementioned existing technical solutions still have significant limitations: First, their adjustment function mainly focuses on the angle deflection of a single drill bit, while the positions of the remaining drill bits remain relatively fixed. Overall, they lack the ability to independently, precisely, and collaboratively adjust multiple drill bits across multiple dimensions, such as horizontal spacing and operating height. This makes the device insufficiently adaptable and flexible when facing complex and varied coal seam thicknesses, hardness distributions, and the need for precise control of roadway cross-sectional shapes. Second, the purpose of its angle adjustment mechanism is to create specific breaking angles to facilitate "material feeding," rather than to achieve omnidirectional attitude adjustments of the drill bits in three-dimensional space to cover the tunneling needs of all positions across the entire cross-section, including the roof, sidewalls, and floor. Therefore, it remains cumbersome when dealing with complex roadway profiles. Finally, this solution does not address the overall lifting and lowering function of the drill bit assembly, making it difficult to quickly adapt to different mining strata. Therefore, designing a multi-point tunneling device for coal mining is essential. Utility Model Content

[0005] This utility model provides a multi-point tunneling device for coal mining, which aims to solve the problems of poor flexibility, inability to achieve multi-point coordinated and adjustable tunneling, and low operating efficiency of existing coal mining tunneling devices.

[0006] This utility model is implemented as follows: a multi-point tunneling device for coal mining includes a main frame; at least one electric telescopic rod fixedly installed at the bottom of the main frame; a first equipment compartment connected by a drive shaft of the electric telescopic rod and movable in a vertical direction; a second equipment compartment fixedly installed at the top of the first equipment compartment; a first horizontal adjustment and mining component disposed inside the first equipment compartment, the first horizontal adjustment and mining component being used to drive at least two first mining drill bits to move in opposite directions or in opposite directions in a horizontal direction to perform mining operations; and a second angle adjustment and mining component disposed on the second equipment compartment, the second angle adjustment and mining component being used to drive at least one second mining drill bit to adjust the mining angle within a preset angle range to perform mining operations.

[0007] Preferably, it further includes: a sliding hole at the top of the main frame of the device; and a sliding rod fixedly connected to the bottom of the first equipment compartment, the sliding rod being movably inserted into the sliding hole, the sliding rod and the sliding hole forming a sliding fit.

[0008] Preferably, the first horizontal adjustment and mining assembly includes: a servo motor fixedly installed on the side wall of the first equipment compartment; a bidirectional threaded rod horizontally disposed inside the first equipment compartment, one end of the bidirectional threaded rod being connected to the output shaft of the servo motor; two mounting brackets symmetrically and movably installed on the outer wall of the bidirectional threaded rod, each mounting bracket having a threaded sleeve at its bottom that threadedly engages with the bidirectional threaded rod; a limiting groove formed in the inner wall of the bottom of the first equipment compartment, a limiting block fixedly connected to each mounting bracket, the limiting block slidingly engaging with the limiting groove; a first drive motor fixedly installed on the top of each mounting bracket; a first mining drill bit fixedly connected to the output shaft of each first drive motor; and a first displacement groove formed in the side wall of the first equipment compartment for the first mining drill bit to pass through.

[0009] Preferably, the threaded sections of the threaded sleeve and the bidirectional threaded rod are left-handed and right-handed threads, respectively.

[0010] Preferably, the second angle adjustment and mining assembly includes: movable holes symmetrically formed on both sides of the outer wall of the second equipment compartment; a connecting rod movably installed in the movable holes via a rotating shaft, the connecting rod being rotatable within the movable holes; a plurality of positioning slots symmetrically formed on the outer wall of the second equipment compartment; an elastic positioning mechanism movably disposed inside the connecting rod, the elastic positioning mechanism being selectively engaged in any of the positioning slots to fix the angle of the connecting rod; a second drive motor fixedly installed at one end of the connecting rod; a second mining drill bit fixedly connected to the output shaft of the second drive motor; and a second displacement slot formed on the outer wall of the second equipment compartment for the second mining drill bit to pass through.

[0011] Preferably, the elastic positioning mechanism includes: a movable groove formed in the inner wall of the connecting rod; a compression block movably disposed in the movable groove, the shape of the compression block fitting the movable groove; a compression rod fixedly connected to the compression block, one end of the compression rod extending out of the connecting rod and fixedly connected to a positioning block; and a spring sleeved on the compression rod, the two ends of the spring abutting against the compression block and the inner wall of the movable groove, respectively.

[0012] Preferably, the shape of the end of the positioning block matches the shape of the positioning groove.

[0013] Preferably, threaded holes for fixing to an external base are provided on both sides of the bottom of the main frame of the device.

[0014] Preferably, the positioning grooves are evenly distributed along a circumferential direction centered on the center of the movable hole.

[0015] Preferably, it also includes a controller, which is electrically connected to the electric telescopic pole, the servo motor, the first drive motor and the second drive motor.

[0016] Compared with related technologies, the multi-point tunneling device for coal mining provided by this utility model has the following beneficial effects: 1. The electric telescopic boom drives the overall lifting and lowering of the first equipment compartment, and the guide and limiting mechanism of the sliding rod and sliding hole enables overall height adjustment of the first and second equipment compartments and all drill bits on them, adapting to different mining levels. The servo motor in the first horizontal adjustment and mining assembly drives a bidirectional threaded rod, causing the two mounting frames and their first mining drill bits to move synchronously and precisely in opposite directions in the horizontal direction. This allows for flexible adjustment of the horizontal distance between the two drill bits, enabling adjustable-width tunneling in the horizontal direction or focused mining of specific areas, greatly enhancing operational flexibility.

[0017] 2. Through the unique elastic positioning mechanism and positioning slot design in the second angle adjustment and mining assembly, the operator only needs to pull the positioning block outward to compress the spring, which releases the locking of the connecting rod, allowing the second drive motor and the second mining drill bit to rotate freely to the desired angle. After releasing, the spring returns to its original position, causing the positioning block to engage with the corresponding positioning slot, quickly completing the angle fixation. This structure enables the second mining drill bit to make a wide range of angle adjustments, achieving efficient mining of coal seams in different directions such as the top and sidewalls. Together with the horizontally adjustable first mining drill bit, it forms a three-dimensional, collaborative, multi-point operation capability, significantly expanding the effective working range of a single unit and improving mining efficiency and the ability to cope with complex working conditions. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the present utility model; Figure 2 This is a front view cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the rear view structure of this utility model; Figure 4 This is a schematic diagram of the first level adjustment and mining component structure of this utility model; Figure 5 This is a schematic diagram of the second angle adjustment and mining component structure of this utility model.

[0019] In the diagram: 1. Main frame of the device; 101. Sliding hole; 102. Threaded hole; 2. Sliding rod; 3. Electric telescopic rod; 4. First equipment compartment; 5. Second equipment compartment; 501. Movable hole; 502. Positioning groove; 6. First horizontal adjustment and mining component; 601. Servo motor; 602. Bidirectional threaded rod; 603. Mounting bracket; 604. Threaded sleeve; 605. Limiting groove; 606. Limiting block; 607. First drive motor; 608. First mining drill bit; 7. Second angle adjustment and mining component; 701. Connecting rod; 702. Elastic positioning mechanism; 703. Movable groove; 704. Compression block; 705. Compression rod; 706. Positioning block; 707. Spring; 708. Second drive motor; 709. Second mining drill bit; 8. First displacement groove; 9. Second displacement groove. Detailed Implementation

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0021] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] Example 1 A preferred embodiment of the multi-point tunneling device for coal mining provided by this utility model is, for example... Figures 1 to 5 As shown: A multi-point tunneling device for coal mining includes a main frame 1; an electric telescopic rod 3 fixedly installed at the bottom of the main frame 1; a first equipment compartment 4 connected by a drive shaft of the electric telescopic rod 3; a second equipment compartment 5 fixedly installed at the top of the first equipment compartment 4; a first horizontal adjustment and mining component 6 disposed inside the first equipment compartment 4, which drives two first mining drill bits 608 to move in opposite directions or back to back in the horizontal direction to perform mining operations; and a second angle adjustment and mining component 7 disposed on the second equipment compartment 5, which drives a second mining drill bit 709 to adjust the mining angle within a preset angle range to perform mining operations.

[0023] It should be noted that some existing coal mine tunneling equipment still has certain shortcomings in actual use. These devices can usually only perform mining operations with a fixed width and angle. When faced with complex and ever-changing coal seam structures, they cannot flexibly adjust the working positions and angles of multiple drill bits, resulting in low mining efficiency, poor adaptability, and difficulty in achieving multi-point coordinated and efficient tunneling.

[0024] In this embodiment, the main frame 1 of the device is fixedly installed at the working position through the threaded hole 102 at its bottom. The electric telescopic rod 3 is activated, causing the first equipment compartment 4 and the second equipment compartment 5 to rise and fall as a whole, thereby adjusting the height of all mining drill bits to the target mining layer. Simultaneously, the sliding cooperation between the sliding rod 2 and the sliding hole 101 ensures the smoothness of the lifting process. The servo motor 601 in the first horizontal adjustment and mining assembly 6 is activated, driving the bidirectional threaded rod 602 to rotate, driving the two mounting frames 603 and their first mining drill bits 608 to move synchronously in opposite directions or in opposite directions along the horizontal direction, thereby adjusting the horizontal distance between the two first mining drill bits 608 to adapt to different mining width requirements. The second angle adjustment and mining assembly 7 is operated to adjust the mining angle of the second mining drill bit 709 to cope with mining operations in different directions such as the roof and sidewalls. Then, all drive motors are activated simultaneously to perform coordinated multi-point tunneling operations. When drill bit replacement or maintenance is required, it can be completed quickly through simple operations.

[0025] In a further preferred embodiment of the present invention, it further includes: a sliding hole 101 opened at the top of the main frame 1 of the device; and a sliding rod 2 fixedly connected to the bottom of the first equipment compartment 4, the sliding rod 2 being movably inserted into the sliding hole 101, and the sliding rod 2 and the sliding hole 101 forming a sliding fit.

[0026] In this embodiment, the sliding engagement between the slide rod 2 and the sliding hole 101 provides precise guidance and limit for the lifting and lowering movement of the first equipment compartment 4, preventing it from tilting or shaking during the lifting and lowering process, ensuring the stability and accuracy of the height adjustment, and thus ensuring that all drill bits can be accurately positioned to the predetermined mining height.

[0027] In a further preferred embodiment of this utility model, the first horizontal adjustment and mining component 6 includes: a servo motor 601 fixedly installed on the side wall of the first equipment compartment 4; a bidirectional threaded rod 602 horizontally disposed inside the first equipment compartment 4, one end of which is connected to the output shaft of the servo motor 601; two mounting brackets 603 symmetrically and movably installed on the outer wall of the bidirectional threaded rod 602, each mounting bracket 603 having a threaded sleeve 604 at its bottom that threadedly engages with the bidirectional threaded rod 602; a limiting groove 605 formed in the inner wall of the bottom of the first equipment compartment 4; a limiting block 606 fixedly connected to each mounting bracket 603, the limiting block 606 slidingly engaging with the limiting groove 605; a first drive motor 607 fixedly installed on the top of each mounting bracket 603; a first mining drill bit 608 fixedly connected to the output shaft of each first drive motor 607; and a first displacement groove 8 formed in the side wall of the first equipment compartment 4 for the first mining drill bit 608 to pass through.

[0028] In this embodiment, the bidirectional threaded rod 602 is driven to rotate by the servo motor 601. Under the threaded engagement of the threaded sleeve 604 and the bidirectional threaded rod 602, and the sliding limit of the limiting block 606 and the limiting groove 605, the two mounting brackets 603 can move synchronously and precisely towards or away from each other, thereby driving the two first mining drill bits 608 to adjust the horizontal distance, realizing stepless adjustment of the mining width, meeting the mining needs of different roadway widths, and improving operational flexibility.

[0029] In a further preferred embodiment of this utility model, the threaded mating sections of the threaded sleeve 604 and the bidirectional threaded rod 602 are left-hand threads and right-hand threads, respectively.

[0030] In this embodiment, by utilizing the combination of left-hand and right-hand threads, when the bidirectional threaded rod 602 rotates, it can drive the two threaded sleeves 604 to produce linear motions in opposite directions, thereby ensuring that the two mounting brackets 603 and the first mining drill bit 608 on them can move towards or away from each other in strict synchronization, thus ensuring the symmetry and accuracy of the adjustment.

[0031] In a further preferred embodiment of the present invention, threaded holes 102 for fixing to an external base are provided on both sides of the bottom of the main frame 1 of the device.

[0032] In this embodiment, the main frame 1 of the device can be firmly installed on the underground working face or mobile platform using fasteners such as bolts through the threaded hole 102, providing a stable and reliable foundation for the entire tunneling device, facilitating the fixing and transfer of the equipment, and enhancing operational safety.

[0033] In a further preferred embodiment of the present invention, a controller is also included, which is electrically connected to the electric telescopic rod 3, the servo motor 601, the first drive motor 607 and the second drive motor 708.

[0034] In this embodiment, the controller can centrally control the raising and lowering of the electric telescopic pole 3, the steering and speed of the servo motor 601, and the start and stop of each drive motor, thereby realizing automated or semi-automated adjustment of height and horizontal spacing, as well as coordinated start and stop control of multiple drill bits, which improves the convenience of operation and work efficiency.

[0035] Example 2 Based on Embodiment 1, a preferred embodiment of the multi-point tunneling device for coal mining provided by this utility model is, for example... Figure 1 , Figure 3 and Figure 5As shown: The second angle adjustment and mining assembly 7 includes: movable holes 501 symmetrically opened on both sides of the outer wall of the second equipment compartment 5; a connecting rod 701 movably installed in the movable holes 501 via a rotating shaft, the connecting rod 701 being rotatable within the movable holes 501; a plurality of positioning slots 502 symmetrically opened on the outer wall of the second equipment compartment 5; an elastic positioning mechanism 702 movably disposed inside the connecting rod 701; a second drive motor 708 fixedly installed at one end of the connecting rod 701; a second mining drill bit 709 fixedly connected to the output shaft of the second drive motor 708; and a second displacement slot 9 opened on the outer wall of the second equipment compartment 5 for the second mining drill bit 709 to pass through.

[0036] In this embodiment, when it is necessary to adjust the mining angle of the second mining drill bit 709, the connecting rod 701 can be released by operating the elastic positioning mechanism 702, allowing the connecting rod 701 and the second drive motor 708 to rotate freely. This allows the second mining drill bit 709 to be adjusted to the required angle via the second displacement groove 9, and then it can be relocked using the elastic positioning mechanism 702. This allows a single drill bit to flexibly handle mining faces in different directions, such as vertical roofs, inclined coal seams, or roadway sidewalls, significantly enhancing the device's adaptability to complex working conditions.

[0037] In a further preferred embodiment of the present invention, the elastic positioning mechanism 702 includes: a movable groove 703 formed in the inner wall of the connecting rod 701; a compression block 704 movably disposed in the movable groove 703, the shape of the compression block 704 fitting the movable groove 703; a compression rod 705 fixedly connected to the compression block 704, one end of the compression rod 705 extending out of the connecting rod 701 and fixedly connected to a positioning block 706; and a spring 707 sleeved on the compression rod 705, the two ends of the spring 707 abutting against the compression block 704 and the inner wall of the movable groove 703 respectively.

[0038] In this embodiment, by pulling the positioning block 706 outward, the compression rod 705 and the compression block 704 move and compress the spring 707, causing the positioning block 706 to disengage from the positioning groove 502, thereby releasing the angle lock. After releasing the positioning block 706, the restoring force of the spring 707 pushes the compression block 704, the compression rod 705, and the positioning block 706 back to their original positions, causing the positioning block 706 to engage in the corresponding positioning groove 502, achieving fast and reliable angle locking. This mechanism has a simple structure, is easy to operate, and provides a secure lock.

[0039] In a further preferred embodiment of the present invention, the end shape of the positioning block 706 matches the shape of the positioning groove 502.

[0040] In this embodiment, by utilizing the matching shape of the end of the positioning block 706 with the shape of the positioning groove 502, it can be ensured that the positioning block 706 makes tight contact when it is inserted into the positioning groove 502, providing sufficient locking force, effectively preventing the connecting rod 701 from rotating unexpectedly under operational vibration, and ensuring the stability of the second mining drill bit 709 at the working angle.

[0041] In a further preferred embodiment of this utility model, the positioning groove 502 is evenly distributed along the circumferential direction with the center of the movable hole 501 as the center.

[0042] In this embodiment, the evenly distributed positioning grooves 502 provide multiple equally spaced preset angle positions for the second mining drill bit 709, so that the angle adjustment has a clear scale feel, making it easy to quickly and accurately position to the commonly used working angle, while also ensuring that the locking effect of the mechanism is consistent in each locking position.

[0043] In summary, the first horizontal adjustment and mining component 6 enables precise and synchronous adjustment of the horizontal distance between the two first mining drill bits 608, while the second angle adjustment and mining component 7 enables rapid and multi-level adjustment of the mining angle of the second mining drill bit 709. The combination of the two enables the device to flexibly adjust the working position and direction of multiple drill bits in three-dimensional space, which can efficiently adapt to complex coal seam conditions and achieve multi-point collaborative and efficient tunneling.

[0044] It is worth noting that the electric telescopic rod 3, servo motor 601, first drive motor 607, and second drive motor 708 involved in this utility model are all conventional components in the art, and their installation and control methods are well known to those skilled in the art. It typically also includes a controller (not shown in the figure), which is electrically connected to the electric telescopic rod 3, servo motor 601, first drive motor 607, and second drive motor 708, for centralized control of the action sequence and parameters of each mechanism, realizing automated or semi-automated operation. The scope of protection of this utility model lies in the innovation of the mechanical structure itself, and does not involve improvements to the control software or methods.

[0045] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0046] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0047] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A multi-point tunneling device for coal mining, characterized in that, include: Main frame of the device (1); At least one electric telescopic rod (3) is fixedly installed at the bottom of the main frame (1) of the device; The first equipment compartment (4) is connected to the drive shaft of the electric telescopic rod (3) and can move in the vertical direction; A second equipment compartment (5) is fixedly installed at the top of the first equipment compartment (4); The first horizontal adjustment and mining assembly (6) is installed inside the first equipment compartment (4). The first horizontal adjustment and mining assembly (6) is used to drive at least two first mining drill bits (608) to move in opposite directions or back to back in the horizontal direction and to carry out mining operations. In addition, a second angle adjustment and mining assembly (7) is provided on the second equipment compartment (5), the second angle adjustment and mining assembly (7) is used to drive at least one second mining drill bit (709) to adjust the mining angle within a preset angle range and to carry out mining operations.

2. The multi-point tunneling device for coal mining as described in claim 1, characterized in that, Also includes: A sliding hole (101) is opened at the top of the main frame (1) of the device; a sliding rod (2) is fixedly connected to the bottom of the first equipment compartment (4), the sliding rod (2) is movably inserted into the sliding hole (101), and the sliding rod (2) and the sliding hole (101) form a sliding fit.

3. The multi-point tunneling device for coal mining as described in claim 1, characterized in that, The first leveling and mining assembly (6) includes: A servo motor (601) is fixedly installed on the side wall of the first equipment compartment (4). A bidirectional threaded rod (602) is horizontally set inside the first equipment compartment (4), and one end of the bidirectional threaded rod (602) is connected to the output shaft of the servo motor (601); Two mounting brackets (603) are symmetrically and movably installed on the outer wall of the bidirectional threaded rod (602). Each mounting bracket (603) has a threaded sleeve (604) at its bottom that is threaded to engage with the bidirectional threaded rod (602). A limiting groove (605) is formed on the bottom inner wall of the first equipment compartment (4), and a limiting block (606) is fixedly connected to each mounting bracket (603). The limiting block (606) slides in conjunction with the limiting groove (605). A first drive motor (607) is fixedly installed on the top of each mounting bracket (603); A first mining drill bit (608) is fixedly connected to the output shaft of each first drive motor (607); And a first displacement groove (8) is opened on the side wall of the first equipment compartment (4) for the first mining drill bit (608) to pass through.

4. The multi-point tunneling device for coal mining as described in claim 3, characterized in that, The threaded sections of the threaded sleeve (604) and the bidirectional threaded rod (602) are left-hand thread and right-hand thread, respectively.

5. The multi-point tunneling device for coal mining as described in claim 1, characterized in that, The second angle adjustment and mining component (7) includes: Symmetrical openings (501) are provided on the outer walls of both sides of the second equipment compartment (5); The connecting rod (701) is movably installed in the movable hole (501) via a rotating shaft, and the connecting rod (701) can rotate within the movable hole (501); Multiple positioning slots (502) are symmetrically opened on the outer wall of the second equipment compartment (5); An elastic positioning mechanism (702) is movably disposed inside the connecting rod (701), and the elastic positioning mechanism (702) can selectively engage with any of the positioning slots (502) to fix the angle of the connecting rod (701); A second drive motor (708) is fixedly installed at one end of the connecting rod (701); The second mining drill bit (709) is fixedly connected to the output shaft of the second drive motor (708); And a second displacement groove (9) is opened on the outer wall of the second equipment compartment (5) for the second mining drill bit (709) to pass through.

6. The multi-point tunneling device for coal mining as described in claim 5, characterized in that, The elastic positioning mechanism (702) includes: A movable groove (703) is formed in the inner wall of the connecting rod (701); A compression block (704) is movably disposed within the movable groove (703), the shape of the compression block (704) fitting the movable groove (703); A compression rod (705) is fixedly connected to the compression block (704), one end of which extends out of the connecting rod (701) and is fixedly connected to a positioning block (706). In addition, a spring (707) is sleeved on the compression rod (705), the two ends of which abut against the compression block (704) and the inner wall of the movable groove (703), respectively.

7. The multi-point tunneling device for coal mining as described in claim 6, characterized in that, The end shape of the positioning block (706) matches the shape of the positioning groove (502).

8. The multi-point tunneling device for coal mining as described in claim 1, characterized in that, The bottom of the main frame (1) of the device is provided with threaded holes (102) on both sides for fixing to the external base.

9. The multi-point tunneling device for coal mining as described in claim 5, characterized in that, The positioning groove (502) is evenly distributed along the circumferential direction with the center of the movable hole (501) as the center.

10. The multi-point tunneling device for coal mining as described in claim 1, characterized in that, It also includes a controller, which is electrically connected to the electric telescopic pole (3), the servo motor (601), the first drive motor (607) and the second drive motor (708).

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