down-the-hole drill

Abstract

The utility model discloses a down -the -hole drill, including frame, be equipped with drilling mechanism, dust removal mechanism and protection subassembly on the frame, dust removal mechanism includes the dust cover of being equipped on drilling mechanism, at least one fan for producing negative pressure, dust collection box and dust absorption pipe for collecting dust, dust absorption pipe is used for connecting dust cover, fan and dust collection box in proper order, dust cover includes inner cover and the outer cover of being sleeved in the outer periphery of inner cover, a plurality of dust absorption holes for communicating outer cover are evenly distributed on the inner cover, and outer cover is connected with dust absorption pipe, dust cover can centralized collection dust of drilling, avoid dust harm worker's health, guarantee the operation safety of construction site, protection subassembly can block the impact of outside rockfall, avoid direct collision to the main body of drill, thereby guarantee down -the -hole drill normal work.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, and in particular, to a down-the-hole drill. Background Technology

[0002] Down-the-hole (DH) drills are commonly used drilling equipment in mining production. During drilling operations, the drill rod rotates and moves axially, while the drill bit advances and rotates at the bottom of the borehole, generating static and impact dynamic pressures. As the drill bit rolls at the bottom of the borehole, it continuously squeezes, cuts, and impacts the rock, breaking it apart. Simultaneously, compressed air with high pressure and high flow rate is ejected from the drill bit's vent through the drill rod and stabilizer, continuously blowing rock debris from the bottom of the borehole out along the annular space between the stabilizer, drill rod, and borehole wall until the required depth of borehole is achieved.

[0003] During drilling, the dust generated is blown back from the bottom of the hole to the opening by the dust exhaust air pressure. If the dust is not controlled, a large amount of dust will permeate the working environment, which will not only pose a great threat to the health of the workers, but also be one of the main natural disasters in coal mines. When the dust concentration reaches a certain level, it can easily cause a dust explosion, affecting the safety of operations at the mining site. In addition, in the complex environment of the mining site, the drilling rig is easily affected by external forces such as rock collisions and falling rock impacts, which can cause deformation of the outer shell of the machine or even damage to the internal mechanical mechanism, affecting the normal operation of the drilling rig. Utility Model Content

[0004] This utility model provides a down-the-hole drill to solve the technical problems that the dust generated by existing down-the-hole drills can harm the health of workers and even affect the safety of mining operations, and that the drill body is easily damaged by external impacts.

[0005] According to one aspect of the present invention, a down-the-hole drill is provided, comprising a frame on which a drilling mechanism, a dust removal mechanism, and protective components are arranged. The dust removal mechanism includes a dust removal hood arranged on the drilling mechanism, at least one fan for generating negative pressure, a dust collection box for collecting dust, and a suction pipe. The suction pipe is used to sequentially connect the dust removal hood, the fan, and the dust collection box. The dust removal hood includes an inner cover and an outer cover fitted around the outer periphery of the inner cover. The inner cover has a plurality of suction holes evenly distributed on it for communicating with the outer cover. The outer cover is connected to the suction pipe.

[0006] Furthermore, the protective assembly includes a support frame disposed on the frame, a protective housing mounted on the support frame, and a buffer block disposed on the inner wall of the protective housing. There is a first gap between the protective housing and the frame, a second gap between the protective housing and the drilling mechanism, and a third gap between the protective housing and the dust removal mechanism. The buffer block is used to fill at least one of the first gap, the second gap, and the third gap.

[0007] Furthermore, the support frame includes crossbeams, diagonal braces, and longitudinal beams for connecting two adjacent crossbeams, which are spaced apart on the frame. The first end of each crossbeam is connected to the frame, and the second end is suspended. The second end of the crossbeam and / or the suspended longitudinal beam are connected to the frame through the diagonal braces.

[0008] Furthermore, the dust collection box is provided with a cleaning door, and the protective shell is provided with an avoidance window adapted to the cleaning door.

[0009] Furthermore, the drilling mechanism includes a drill rod assembly and a linear motion assembly for adjusting the working position of the drill rod assembly. The drill rod assembly includes a drill rod for construction, a first drive device for driving the drill rod, and a coupling for connecting the first drive device and the drill rod. The first drive device is disposed on the free end of the linear motion assembly, and the dust cover is slidably sleeved on the working end of the drill rod.

[0010] Furthermore, the linear motion assembly includes a slide rail mounted on the frame, a sliding plate slidably mounted on the slide rail, a second drive device mounted on the frame, a drive wheel mounted on the output shaft of the second drive device, a driven wheel mounted on the frame, and a transmission belt wound around the drive wheel and the driven wheel. The sliding plate is fixedly connected to the transmission belt, and the first drive device is mounted on the sliding plate.

[0011] Furthermore, the dust cover is provided with a slider that is slidably connected to the slide rail and a limiting member for limiting the relative position of the slider and the slide rail.

[0012] Furthermore, the drilling mechanism also includes an anti-sway component, which includes an anti-sway frame mounted on the sliding plate, a bushing sleeved on the drill rod, and a linear telescopic component for connecting the anti-sway frame and the bushing.

[0013] Furthermore, the bushing includes a sleeve and bearings arranged at both ends of the sleeve. The drill rod is movably connected to the inner ring of the bearing. One end of the linear telescopic assembly is connected to the anti-sway frame, and the other end is connected to the sleeve.

[0014] Furthermore, the down-the-hole drill also includes a traveling mechanism, and the frame is provided with mounting brackets and positioning rods for connecting the traveling mechanism.

[0015] This utility model has the following beneficial effects:

[0016] This utility model discloses a down-the-hole drill rig with a dust collection hood on the drilling mechanism. The dust collection hood consists of an inner hood and an outer hood. The inner hood completely covers the borehole opening, and its inner cavity serves as a dust collection chamber. A suction chamber is formed between the inner and outer hoods, and this suction chamber is connected to a suction pipe. The dust collection chamber and the suction chamber are connected through suction holes. Multiple suction holes are arranged at intervals along the axial and / or circumferential direction of the inner hood, allowing the dust collection chamber to collect dust from all directions. The inner hood with suction holes also has a filtering effect, preventing larger stones from entering the suction pipe and thus avoiding collisions between stones and the fan blades, ensuring proper fan operation. During normal operation, the blower draws in air, creating negative pressure around the inner cover of the dust collection chamber. This allows for simultaneous dust collection from all sides of the inner cover, avoiding the need to collect dust only along the direction of the suction pipe, thus improving the dust collection effect. Dust enters the dust collection chamber through the dust collection holes on the inner cover and is then sucked into the dust collection box through the suction pipe for centralized processing. The dust collection hood can collect the dust generated during drilling, preventing dust from harming the health of workers and ensuring the safety of the construction site. The protective components can block the impact of falling rocks, preventing direct collisions with the main body of the drilling rig, thus ensuring the normal operation of the down-the-hole drilling rig.

[0017] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of a down-the-hole drill according to a preferred embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the drilling mechanism according to a preferred embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the drill pipe assembly according to a preferred embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the linear motion component according to a preferred embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the dust removal mechanism of a preferred embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the dust removal hood according to a preferred embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the protective component according to a preferred embodiment of the present invention.

[0026] Legend:

[0027] 1. Frame; 11. Mounting bracket; 12. Positioning rod; 2. Drilling mechanism; 21. Drill rod assembly; 211. Drill rod; 212. First drive unit; 213. Coupling; 22. Linear motion assembly; 221. Slide rail; 222. Sliding plate; 223. Second drive unit; 224. Drive wheel; 225. Driven wheel; 226. Transmission belt; 23. Anti-sway assembly; 231. Anti-sway bracket; 232. Bushing; 2321. Sleeve; 232 2. Bearing; 233. Linear telescopic assembly; 3. Dust removal mechanism; 31. Dust hood; 311. Inner cover; 312. Outer cover; 313. Suction hole; 314. Slider; 315. Limiting component; 32. Fan; 34. Dust collection box; 341. Cleaning door; 33. Suction pipe; 4. Protective assembly; 41. Support frame; 411. Crossbeam; 412. Longitudinal beam; 413. Diagonal brace beam; 42. Protective shell; 421. Refuge window; 43. Buffer block. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that if any directional indication (such as up, down, left, right, front, or back) is involved in the embodiments of this utility model, the orientation or positional relationship of the directional indication is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments according to this application and simplifying the description, and is not intended to indicate or imply that the device or unit referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments according to this application.

[0030] Furthermore, if the embodiments of this utility model involve descriptions using terms such as "first," "second," and "third," these terms are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," or "third" may explicitly or implicitly include at least one of those features. The term "multiple" refers to two or more unless otherwise explicitly defined. Terms such as "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium.

[0031] If the words "and / or" or "and / or" appear in the text, they mean three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that satisfies both A and B. In addition, the technical solutions of various embodiments can be combined with each other, but must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope of this utility model.

[0032] To better understand the above technical solution, the following detailed explanation is provided in conjunction with the accompanying drawings.

[0033] Please refer to the following: Figures 1 to 7 The down-the-hole drill of this embodiment includes a frame 1, on which a drilling mechanism 2, a dust removal mechanism 3 and a protective component 4 are arranged. The dust removal mechanism 3 includes a dust removal hood 31 arranged on the drilling mechanism 2, at least one fan 32 for generating negative pressure, a dust collection box 34 for collecting dust and a suction pipe 33. The suction pipe 33 is used to connect the dust removal hood 31, the fan 32 and the dust collection box 34 in sequence. The dust removal hood 31 includes an inner cover 311 and an outer cover 312 sleeved on the outer periphery of the inner cover 311. A plurality of suction holes 313 for connecting the outer cover 312 are evenly distributed on the inner cover 311. The outer cover 312 is connected to the suction pipe 33.

[0034] In this embodiment of the down-the-hole drill, the drilling mechanism 2 is equipped with a dust collection hood 31. The dust collection hood 31 is divided into an inner hood 311 and an outer hood 312. The inner hood 311 can completely cover the borehole opening, and the inner cavity of the inner hood 311 serves as a dust collection chamber. A dust suction chamber is formed between the inner hood 311 and the outer hood 312. The dust suction chamber is connected to the dust suction pipe 33. The dust collection chamber and the dust suction chamber are connected through dust suction holes 313. Multiple dust suction holes 313 are arranged at intervals along the axial and / or circumferential directions of the inner hood 311, so that the dust collection chamber collects the generated dust from all directions. The inner hood 311 with dust suction holes 313 also has a filtering effect, which can prevent larger stones from entering the dust suction pipe 33, thereby avoiding stones from colliding with the blades of the fan 32. The system prevents collisions between particles, ensuring the normal operation of the blower 32. During drilling, the blower 32 operates, drawing away air to create negative pressure around the inner cover 311, allowing dust to be drawn from all sides of the inner cover 311 simultaneously, avoiding suction only along the direction of the suction pipe 33, thus improving the suction effect. Dust enters the suction chamber through the suction holes 313 on the inner cover 311, and is then sucked into the dust collection box 34 through the suction pipe 33 for centralized processing. The dust hood 31 can collect the dust generated during drilling, preventing dust from harming the health of workers and ensuring operational safety at the construction site. The protective component 4 can block the impact of falling rocks, preventing direct collisions with the main body of the drill, thus ensuring the normal operation of the down-the-hole drill. Optionally, there can be two blowers 32 connected by a suction pipe 33. The two blowers 32 can provide suction of different intensities, which can be adjusted according to the actual drilling operation to ensure that dust can be effectively sucked in. It is understood that there can also be three or more blowers 32, which can be increased or decreased according to actual usage needs. Optionally, the dust hood 31 is in the shape of an inverted funnel, and the suction pipe 33 is connected to the upper part of the dust hood 31, so that while ensuring suction power, the dust hood 31 can cover a larger construction surface as much as possible.

[0035] like Figure 1 As shown, in this embodiment, the protective component 4 includes a support frame 41 mounted on the frame 1, a protective shell 42 mounted on the support frame 41, and a buffer block 43 mounted on the inner wall of the protective shell 42. The support frame 41 is mounted on the top of the frame 1. The protective shell 42 is connected to the support frame 41 by screws. There is a first gap between the protective shell 42 and the frame 1, a second gap between the protective shell 42 and the drilling mechanism 2, and a third gap between the protective shell 42 and the dust removal mechanism 3. The buffer block 43 is used to fill at least one of the first gap, the second gap, and the third gap. The buffer block 43 fills the gaps between the protective shell 42 and the frame 1, between the protective shell 42 and the drilling mechanism 2, and between the protective shell 42 and the dust removal mechanism 3. When the down-the-hole drill is impacted by falling rocks, the protective shell 42 can block the impact, and the buffer block 43 can withstand the external impact force, thus avoiding a hard collision with the main body of the drill.

[0036] like Figure 1 , Figure 2 and Figure 7 As shown, in this embodiment, the support frame 41 includes crossbeams 411 spaced apart on the frame 1, diagonal bracing beams 413, and longitudinal beams 412 for connecting two adjacent crossbeams 411. The first end of the crossbeam 411 is connected to the frame 1, and the second end is suspended. The second end of the crossbeam 411 and / or the suspended longitudinal beam 412 are connected to the frame 1 through the diagonal bracing beams 413. The diagonal bracing beams 413, the frame 1, and the second end of the crossbeams 411 can form a stable triangular support, which can improve the rigidity of the support frame 41 and ensure that the support frame 41 will not easily break when subjected to impact force.

[0037] like Figure 1 As shown, in this embodiment, the dust collection box 34 is provided with a cleaning door 341, and the protective shell 42 is provided with an avoidance window 421 adapted to the cleaning door 341; after construction is completed, the collected dust can be cleaned by opening the cleaning door 341. The structure is simple and the operation is convenient.

[0038] like Figure 2 and Figure 3 As shown, in this embodiment, the drilling mechanism 2 includes a drill rod assembly 21 and a linear motion assembly 22 for adjusting the working position of the drill rod assembly 21. The drill rod assembly 21 includes a drill rod 211 for drilling, a first drive device 212 for driving the drill rod 211, and a coupling 213 for connecting the first drive device 212 and the drill rod 211. The first drive device 212 is disposed on the free end of the linear motion assembly 22. The dust cover 31 is slidably sleeved on the working end of the drill rod 211. The fixed end of the linear motion assembly 22 is disposed on the frame 1. The free end of the linear motion assembly 22 is connected to the drill rod assembly 21 and can drive the drill rod. Component 21 moves along the construction direction; the elastic element inside the coupling 213 can absorb vibration and impact during operation. When the drill rod 211 is jammed, the coupling 213 will preferentially disconnect through a slippage or breakage mechanism, providing overload protection, ensuring the stability and safety of power transmission, and extending the service life of the equipment; the first drive device 212 is used to drive the drill rod 211 to generate rotary and axial motion (the first drive device 212 for driving the drill rod 211 to generate rotary and axial motion is existing technology and will not be described in detail here), and the dust hood 31 can cover the construction end of the drill rod 211, collect the layered dust generated during drilling, and extract it. Optionally, the linear movement component 22 is a hydraulic cylinder, a pneumatic cylinder, a gear and rack assembly driven by a motor, or a ball screw driven by a motor.

[0039] like Figure 2 , Figure 4 and Figure 7As shown, in this embodiment, the linear motion assembly 22 includes a slide rail 221 mounted on the frame 1, a sliding plate 222 slidably mounted on the slide rail 221, a second drive device 223 mounted on the frame 1, a drive wheel 224 mounted on the output shaft of the second drive device 223, a driven wheel 225 mounted on the frame 1, and a transmission belt 226 wound around the drive wheel 224 and the driven wheel 225. The sliding plate 222 is fixedly connected to the transmission belt 226, and the first drive device 212 is mounted on the sliding plate 222. The second drive device 223 is fixedly mounted on the frame 1. 12 is fixedly installed on the sliding plate 222. The driving wheel 224 and driven wheel 225 are installed at intervals on the frame 1 along the construction direction and the transmission belt 226 is tensioned. The transmission belt 226 is arranged parallel to the slide rail 221. The sliding plates 222 are fixedly connected to each other by fasteners. In use, the second drive device 223 drives the driving wheel 224 to rotate, and the sliding plate 222 moves along the slide rail 221 through the transmission belt 226. The construction position of the drill rod assembly 21 can be adjusted according to the construction requirements. This mechanical transmission structure is simple, easy to maintain, and can reduce manufacturing and use costs. Optionally, such as Figure 7 As shown, the slide rail 221 has an L-shaped cross-section, and the two slide rails 221 are symmetrically arranged on the frame 1. The sliding plate 222 has grooves corresponding to the two slide rails 221. Optionally, the second drive device 223 is a pneumatic motor, a hydraulic motor, or an electric motor. Optionally, the driving wheel 224 and the driven wheel 225 are both sprockets, and the transmission belt 226 is a chain, which can prevent the transmission belt 226 from slipping relative to the driving wheel 224 and the driven wheel 225.

[0040] like Figure 2 and Figure 3 As shown, in this embodiment, the dust cover 31 is provided with a slider 314 that is slidably connected to the slide rail 221 and a limiting member 315 for limiting the relative position of the slider 314 and the slide rail 221; the slider 314 is fixedly connected to the top plate of the dust cover 31, and the slider 314 is provided with a sliding groove that is adapted to the slide rail 221, so that the slider 314 and the sliding plate 222 can slide synchronously along the slide rail 221. When the dust cover 31 is just close to the construction surface, the limiting member 315 fixes the relative position of the slider 314 and the slide rail 221, and the position of the dust cover 31 can be adjusted according to the construction surface, which has a wide range of applications. Optionally, the limiting component 315 is a locking screw. When it is necessary to fix the relative position of the slider 314 and the slide rail 221, the locking screw is rotated to make the locking screw press against the slide rail 221; when it is necessary to adjust the relative position of the slider 314 and the slide rail 221, the locking screw is rotated to make the locking screw disengage from the slide rail 221. The locking screw has a simple structure, can be purchased directly, and is inexpensive.

[0041] like Figure 2 and Figure 3As shown, in this embodiment, the drilling mechanism 2 further includes an anti-sway component 23. The anti-sway component 23 includes an anti-sway frame 231 mounted on the sliding plate 222, a bushing 232 sleeved on the drill rod 211, and a linear telescopic component 233 for connecting the anti-sway frame 231 and the bushing 232. The anti-sway frame 231 is fixedly mounted on the sliding plate 222 by fasteners and can move together with the second drive device 223. The higher the working frequency of the drill rod 211, the greater the vibration amplitude of the drill rod 211. Activating the linear telescopic component 233 drives the bushing 232 closer to the dust cover 31, making the contact position between the bushing 232 and the drill rod 211 closer to the construction end, which can reduce the vibration amplitude of the drill rod 211 and improve drilling accuracy. Optionally, the linear telescopic component 233 is a gear and rack assembly driven by a hydraulic cylinder, a pneumatic cylinder, or a motor.

[0042] like Figure 3 As shown, in this embodiment, the bushing 232 includes a sleeve 2321 and bearings 2322 arranged at both ends of the sleeve 2321. The drill rod 211 is movably connected to the inner ring of the bearing 2322. One end of the linear telescopic component 233 is connected to the anti-sway frame 231, and the other end is connected to the sleeve 2321. The sleeve 2321 can serve as a support for the two bearings 2322 and can also wrap around a section of the drill rod 211 to ensure that the area of ​​the wrapped drill rod 211 is protected from external impact. The bearings 2322 can reduce the friction when the drill rod 211 rotates relative to the bushing 232. This extends the service life of drill rod 211. The inner ring of drill rod 211 relative to bearing 2322 can slide along the axial direction and rotate around its own axis. The higher the working frequency of down-the-hole drill, the greater the vibration amplitude of drill rod 211. When the linear telescopic component 233 is activated, it extends and drives the bushing 232 closer to the dust cover 31, so that the contact position between bearing 2322 on sleeve 2321 and drill rod 211 is closer to the construction end, which can reduce the vibration amplitude of drill rod 211, ensure the stability of drill rod 211, and improve drilling accuracy.

[0043] In this embodiment, the down-the-hole drill also includes a traveling mechanism. The frame 1 is provided with a mounting frame 11 and a positioning rod 12 for connecting the traveling mechanism. The frame 1 is suspended on the traveling mechanism by the positioning rod 12. At this time, the mounting frame 11 on the frame 1 is aligned with the connecting hole on the traveling mechanism. The mounting frame 11 is then fixedly connected to the traveling mechanism by bolts. According to the terrain of the mining site and the drilling location, the down-the-hole drill is moved to the designated construction location by the traveling mechanism.

[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A down-the-hole drill, characterized in that, The system includes a frame (1), on which a drilling mechanism (2), a dust removal mechanism (3), and a protective component (4) are arranged. The dust removal mechanism (3) includes a dust removal hood (31) arranged on the drilling mechanism (2), at least one fan (32) for generating negative pressure, a dust collection box (34) for collecting dust, and a suction pipe (33). The suction pipe (33) is used to connect the dust removal hood (31), the fan (32), and the dust collection box (34) in sequence. The dust removal hood (31) includes an inner cover (311) and an outer cover (312) fitted around the outer periphery of the inner cover (311). The inner cover (311) has a plurality of suction holes (313) for connecting the outer cover (312). The outer cover (312) is connected to the suction pipe (33).

2. The down-the-hole drill rig according to claim 1, characterized in that, The protective component (4) includes a support frame (41) arranged on the frame (1), a protective shell (42) installed on the support frame (41), and a buffer block (43) arranged on the inner wall of the protective shell (42). There is a first gap between the protective shell (42) and the frame (1), a second gap between the protective shell (42) and the drilling mechanism (2), and a third gap between the protective shell (42) and the dust removal mechanism (3). The buffer block (43) is used to fill at least one of the first gap, the second gap, and the third gap.

3. The down-the-hole drill rig according to claim 2, characterized in that, The support frame (41) includes crossbeams (411), diagonal bracing beams (413), and longitudinal beams (412) for connecting two adjacent crossbeams (411) spaced apart on the frame (1). The first end of the crossbeam (411) is connected to the frame (1), and the second end is suspended. The second end of the crossbeam (411) and / or the suspended longitudinal beam (412) are connected to the frame (1) through the diagonal bracing beam (413).

4. The down-the-hole drill rig according to claim 2, characterized in that, The dust collection box (34) is provided with a cleaning door (341), and the protective shell (42) is provided with an avoidance window (421) adapted to the cleaning door (341).

5. The down-the-hole drill rig according to any one of claims 1 to 4, characterized in that, The drilling mechanism (2) includes a drill rod assembly (21) and a linear motion assembly (22) for adjusting the construction position of the drill rod assembly (21). The drill rod assembly (21) includes a drill rod (211) for construction, a first drive device (212) for driving the drill rod (211), and a coupling (213) for connecting the first drive device (212) and the drill rod (211). The first drive device (212) is arranged on the free end of the linear motion assembly (22), and the dust cover (31) is slidably sleeved on the construction end of the drill rod (211).

6. The down-the-hole drill rig according to claim 5, characterized in that, The linear motion assembly (22) includes a slide rail (221) mounted on the frame (1), a sliding plate (222) slidably mounted on the slide rail (221), a second drive device (223) mounted on the frame (1), a drive wheel (224) mounted on the output shaft of the second drive device (223), a driven wheel (225) mounted on the frame (1), and a transmission belt (226) wound around the drive wheel (224) and the driven wheel (225). The sliding plate (222) is fixedly connected to the transmission belt (226), and the first drive device (212) is mounted on the sliding plate (222).

7. The down-the-hole drill rig according to claim 6, characterized in that, The dust cover (31) is provided with a slider (314) that is slidably connected to the slide rail (221) and a limiting member (315) for limiting the relative position of the slider (314) and the slide rail (221).

8. The down-the-hole drill rig according to claim 6, characterized in that, The drilling mechanism (2) further includes an anti-sway component (23), which includes an anti-sway frame (231) mounted on the sliding plate (222), a bushing (232) sleeved on the drill rod (211), and a linear telescopic component (233) for connecting the anti-sway frame (231) and the bushing (232).

9. The down-the-hole drill rig according to claim 8, characterized in that, The bushing (232) includes a sleeve (2321) and bearings (2322) arranged at both ends of the sleeve (2321). The drill rod (211) is movably connected to the inner ring of the bearing (2322). One end of the linear telescopic component (233) is connected to the anti-sway frame (231), and the other end is connected to the sleeve (2321).

10. The down-the-hole drill rig according to claim 1, characterized in that, It also includes a walking mechanism, on which a mounting bracket (11) and a positioning rod (12) for connecting the walking mechanism are provided.

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