CN215169843U - Dust catching device for drilling machine - Google Patents

Abstract

The utility model provides a rig is with catching dirt device, including catching a dirt section of thick bamboo, base and uide bushing, the base with the top fixed connection who catches a dirt section of thick bamboo, the uide bushing is including relative first clamp splice and the second clamp splice that sets up, first clamp splice with the second clamp splice all is located the base top and all with the base is articulated, the uide bushing is equipped with the clamping groove, the clamping groove by first clamp splice with the second clamp splice encloses jointly and closes the formation, the clamping groove is used for the holding drilling rod. The utility model discloses an increase the uide bushing to reduce the rig and be carrying out the possibility of drilling rod incline operation when drilling work.

Description

Dust catching device for drilling machine

Technical Field

The utility model belongs to the technical field of mechanical equipment technique and specifically relates to a dust catching device is used to rig.

Background

The down-the-hole drill is widely applied to various fields such as mining, metallurgy, building, machining and the like, and is used for drilling blast holes in basic construction, tunnel excavation, exploration, quarrying and mining operation. A down-the-hole drill can generate a large amount of dust during drilling, and in the prior art, a dust catching device is generally arranged on the drill and is used for collecting the dust so as to ensure a good drilling operation environment.

The dust catching device in the prior art is generally provided with a driving device, the driving device is used for driving the dust catching device to move up and down, meanwhile, the bottom of the dust catching device is provided with a dust catching cover with a horn-shaped structure, and the driving device drives the dust catching device to move up and down to enable the dust catching cover to be always attached to a plane where a drilling hole is located, so that the sealing dust collection effect is improved. The side wall of the dust catching device is provided with a dust suction pipe which is connected with the vacuum dust suction device, and under the action of the vacuum dust suction device, dust generated during drilling is sucked into the vacuum dust suction device, so that the dust suction effect is achieved. The top end of the dust catching device is provided with a drill rod hole, the drill rod hole can be penetrated by a drill rod, the drill bit is connected with the drill rod and is positioned in the dust catching device, so that dust generated by the drill bit during drilling operation can be sucked away and discharged by the dust catching device.

However, the dust catching device is not provided with a clamping device or a guiding device at the drill rod hole, so that the drill rod is easy to deviate in position in the drill rod hole during drilling operation of the drilling machine, the drill rod is inclined to operate, and the drilling operation efficiency and the equipment service life are influenced. Meanwhile, after the drilling operation is completed, an operator generally needs to manually fix the drill rod by using a wrench (so as to prevent the drill rod from rotating and facilitate the removal of the drill rod from the drilling machine) during the operation of removing the drill rod (replacing the drill rod), so that the operation difficulty is high, the manpower is wasted, and certain operation danger is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a dust catching device is used to rig aims at solving the not enough that above-mentioned background exists, through increasing the uide bushing to reduce the rig and be carrying out the possibility of drilling rod incline operation when drilling the work.

The utility model provides a rig is with catching dirt device, including catching a dirt section of thick bamboo, base and uide bushing, the base with the top fixed connection who catches a dirt section of thick bamboo, the uide bushing is including relative first clamp splice and the second clamp splice that sets up, first clamp splice with the second clamp splice all is located the base top and all with the base is articulated, the uide bushing is equipped with the clamping groove, the clamping groove by first clamp splice with the second clamp splice encloses jointly and closes the formation, the clamping groove is used for the holding drilling rod.

Furthermore, the dust catching device further comprises a first clamping jaw and a second clamping jaw, the first clamping jaw comprises a first connecting arm and a first clamping arm which are connected with each other, the first clamping arm is located in the clamping groove, the first connecting arm is connected with the first clamping block in a sliding mode, the second clamping jaw comprises a second connecting arm and a second clamping arm, the second clamping arm is located in the clamping groove, and the second connecting arm is connected with the second clamping block in a sliding mode.

Furthermore, semicircular grooves are formed in the sides, close to each other, of the first clamping block and the second clamping block, and the clamping grooves are formed by the grooves in the first clamping block and the grooves in the second clamping block.

Further, the first clamping block and the second clamping block are of Y-shaped structures, the first clamping block comprises a first rotating portion, a first clamping portion and a second clamping portion which are connected with each other, the second clamping block comprises a second rotating portion, a third clamping portion and a fourth clamping portion which are connected with each other, the clamping groove is formed by the first clamping portion, the second clamping portion, the third clamping portion and the fourth clamping portion in a surrounding mode, and the first rotating portion and the second rotating portion are arranged on two sides of the base and hinged to the base.

Further, the first clamping part and the third clamping part and the second clamping part and the fourth clamping part are fixed through bolts.

Further, the first rotating part is provided with a first sliding groove, and the first connecting arm is located in the first sliding groove and can slide along the first sliding groove; the second rotating part is provided with a second sliding groove, and the second connecting arm is located in the second sliding groove and can slide along the second sliding groove.

Furthermore, a first limit groove is formed in the first rotating part, a first limit part is arranged on the first connecting arm, and the first limit part is located in the first limit groove and can slide along the first limit groove; the second rotating part is internally provided with a second limiting groove, the second connecting arm is provided with a second limiting part, and the second limiting part is positioned in the second limiting groove and can slide along the second limiting groove.

Furthermore, a first lug boss is arranged on the first clamping jaw, and a second lug boss is arranged on the second clamping jaw.

Furthermore, an opening is formed in the top of the dust collecting cylinder, a through hole is formed in the base, the opening, the through hole and the clamping groove are corresponding in position, and the diameter of the clamping groove is smaller than the diameter of the opening and the diameter of the through hole.

Furthermore, a dust catching cover is fixed at the bottom of the dust catching cylinder, and a dust exhaust pipe is arranged on the side wall of the dust catching cylinder; the top of the dust catching cylinder is provided with a fixing plate, the fixing plate is positioned below the base and fixedly connected with the base, and a dust pad is clamped between the fixing plate and the base.

Furthermore, the dust catching device further comprises a sliding connection mechanism, the sliding connection mechanism is fixedly connected with the base, and the sliding connection mechanism is provided with a sliding groove.

The utility model provides a dust catching device is used to rig through increasing the uide bushing, and the uide bushing is equipped with the double-layered groove that is used for the holding drilling rod, under the direction and centre gripping (spacing) effect of uide bushing for the rig can the steady operation at the during operation drilling rod that drills, has reduced the possibility of drilling rod incline operation. Meanwhile, the first clamping block and the second clamping block are hinged with the base, namely the guide sleeve is of a reversible structure, when the first clamping block and the second clamping block are turned inwards and buckled together, the size of a clamping groove formed by the first clamping block and the second clamping block in a surrounding mode is matched with the size of the drill rod, and good guiding and clamping (limiting) effects can be achieved on the drill rod; when the first clamping block and the second clamping block are turned outwards, the clamping effect can be relieved, so that the impacter and the drill bit with larger sizes (the size of the impacter and the size of the drill bit are larger than that of the drill rod) can also pass through the guide sleeve, and the installation and the disassembly are convenient.

Drawings

Fig. 1 is a schematic structural view of a dust catching device in an embodiment of the present invention.

Fig. 2 is a schematic view of the connection between the base and the sliding connection mechanism in the embodiment of the present invention.

Fig. 3 is a schematic structural diagram of the first clamping block and/or the second clamping block in the embodiment of the present invention.

Fig. 4 is a schematic structural diagram of the first jaw and/or the second jaw in the embodiment of the present invention.

Fig. 5 is a schematic cross-sectional view of a first jaw assembled in a first clamp block and/or a second jaw assembled in a second clamp block according to an embodiment of the present invention.

Fig. 6 is a schematic structural view of a dust collecting cylinder according to an embodiment of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms of orientation of the upper, lower, left, right, front, back, top, bottom, etc. (if any) referred to in the specification and claims of the present invention are defined as the positions of the structures in the drawings and the positions of the structures relative to each other, and are only for the sake of clarity and convenience in describing the technical solutions. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

As shown in fig. 1, the dust catching device for a drilling machine provided by the embodiment of the present invention can be used for a split type down-the-hole drilling machine (not shown). The dust catching device comprises a dust catching cylinder 1, a base 2 and a guide sleeve 3, wherein the base 2 is fixedly connected with the top of the dust catching cylinder 1. The guide sleeve 3 comprises a first clamping block 31 and a second clamping block 32 which are oppositely arranged, and the first clamping block 31 and the second clamping block 32 are both positioned above the base 2 and are both hinged with the base 2. The guide sleeve 3 is provided with a clamping groove 33, the clamping groove 33 is formed by the first clamping block 31 and the second clamping block 32, and the clamping groove 33 is used for accommodating a drill rod (not shown).

Specifically, when the drilling machine performs drilling operation, the drill rod moves up and down and rotates, and the position of the drill rod is easy to deviate due to complex working conditions during construction, so that the drill rod is inclined to operate. Through increasing uide bushing 3, uide bushing 3 is equipped with the double-layered groove 33 that is used for the holding drilling rod for the rig drilling rod can stable work when carrying out drilling work under the direction and centre gripping (spacing) effect of uide bushing 3, has reduced the possibility of drilling rod skew operation.

Further, as shown in fig. 1 and 3, in the present embodiment, the first clamping block 31 and the second clamping block 32 are both Y-shaped. The first clamping block 31 comprises a first rotating portion 311, a first clamping portion 312 and a second clamping portion 313 which are connected with each other, the second clamping block 32 comprises a second rotating portion 321, a third clamping portion 322 and a fourth clamping portion 323 which are connected with each other, the clamping groove 33 is formed by the first clamping portion 312, the second clamping portion 313, the third clamping portion 322 and the fourth clamping portion 323 which are enclosed together, and the first rotating portion 311 and the second rotating portion 321 are arranged corresponding to two sides of the base 2 and are hinged to the base 2.

Specifically, in the present embodiment, the first clamping block 31 and the second clamping block 32 are provided with semicircular grooves 30 on the sides close to each other, the grooves 30 on the first clamping block 31 are formed by the first clamping portion 312 and the second clamping portion 313, and the grooves 30 on the second clamping block 32 are formed by the third clamping portion 322 and the fourth clamping portion 323. The clamping groove 33 is formed by the groove 30 on the first clamping block 31 and the groove 30 on the second clamping block 32. Because the first clamping block 31 and the second clamping block 32 are hinged with the base 2, namely the guide sleeve 3 is of a reversible structure, when the first clamping block 31 and the second clamping block 32 are turned inwards and buckled together (corresponding to the state in fig. 1), the size of the clamping groove 33 enclosed by the first clamping block 31 and the second clamping block 32 is matched with the size of the drill rod, and the drill rod can be well guided and clamped (limited); when the first clamping block 31 and the second clamping block 32 are turned outwards, the first clamping block 31 and the second clamping block 32 are far away from each other, so that the clamping effect on the drill rod is relieved, and meanwhile, a large-sized impactor and a large-sized drill bit (not shown, the impactor and the drill bit are larger than the drill rod) can also pass through the guide sleeve 3, so that the installation and the disassembly of the drill rod are facilitated.

Further, referring to fig. 1 and fig. 3, in the present embodiment, the first clamping portion 312 and the third clamping portion 322, and the second clamping portion 313 and the fourth clamping portion 323 are fixed by the bolts 34. When the first clamping block 31 and the second clamping block 32 are turned inwards and buckled together, the first clamping block 31 and the second clamping block 32 are fixedly connected through the bolt 34 to jointly enclose the clamping groove 33; when the first clamping block 31 and the second clamping block 32 need to be turned outwards, the connection relationship between the first clamping block 31 and the second clamping block 32 can be released after the bolt 34 is removed, so that the drill rod is convenient to mount and dismount.

Further, as shown in fig. 1 to 3, in the present embodiment, four connection blocks 16 are provided on the base 2, the first rotation portion 311 is rotatably connected to two of the connection blocks 16 by a pin 17, and the second rotation portion 321 is rotatably connected to the other two connection blocks 16 by the pin 17.

Further, as shown in fig. 1 and 4, in the present embodiment, the dust catching device further includes a first jaw 41 and a second jaw 42, and the first jaw 41 and the second jaw 42 have a Y-shaped structure similar to the first block 31 and the second block 32. The first jaw 41 includes a first connecting arm 411 and a first holding arm 412 connected to each other, the first holding arm 412 is located in the holding groove 33, and the first connecting arm 411 is slidably connected to the first clamping block 31. The second jaw 42 includes a second connecting arm 421 and a second holding arm 422, the second holding arm 422 is located in the holding groove 33, and the second connecting arm 421 is slidably connected to the second holding block 32.

Specifically, when the drilling machine is used for drilling, the drill rod is spaced from the guide sleeve 3, the first jaw 41 and the second jaw 42 (namely, the guide sleeve 3, the first jaw 41 and the second jaw 42 do not clamp the drill rod), so that the drill rod can smoothly move up and down or rotate in the clamping groove 33. After the drilling operation is completed, when the rod unloading (rod changing) operation is performed, the first clamping jaw 41 and the second clamping jaw 42 slide inwards along the radial direction, so that the drill rod can be clamped and fixed by the first clamping jaw 41 and the second clamping jaw 42, the radial fixing function of the drill rod is realized, the drill rod is prevented from rotating, and the drill rod is conveniently unloaded from the drilling machine. The traditional rod unloading (rod replacing) operation needs to manually fix the drill rod by using a wrench, so that the operation difficulty is high, the manpower is wasted, and meanwhile, certain operation danger is caused.

Specifically, as shown in fig. 3 to 5, in the present embodiment, the first rotating portion 311 is provided with the first sliding slot 314, and the first connecting arm 411 is located in the first sliding slot 314 and can slide along the first sliding slot 314. The second rotating portion 321 has a second sliding slot 324, and the second connecting arm 421 is located in the second sliding slot 324 and can slide along the second sliding slot 324.

Further, as shown in fig. 3 to 5, in the present embodiment, a first limiting groove 315 is disposed in the first rotating portion 311, the first connecting arm 411 has a first limiting portion 413, and the first limiting portion 413 is disposed in the first limiting groove 315 and can slide along the first limiting groove 315. The second rotating portion 321 is provided with a second limiting groove 325 therein, the second connecting arm 421 is provided with a second limiting portion 423, and the second limiting portion 423 is located in the second limiting groove 325 and can slide along the second limiting groove 325.

Specifically, in the present embodiment, the first limiting groove 315, the second limiting groove 325, the first limiting portion 413 and the second limiting portion 423 are all cylindrical structures. The first limiting portion 413 and the first limiting groove 315 are matched with each other, so that the first claw 41 can slide smoothly, and the first claw 41 can be prevented from falling off from the first clamping block 31; the second stopper 423 is engaged with the second stopper groove 325, so that the second jaw 42 can slide smoothly and the second jaw 42 can be prevented from falling off from the second clamping block 32.

Further, as shown in fig. 4 and 5, in the present embodiment, the first jaw 41 is provided with a first protrusion 414, and the second jaw 42 is provided with a second protrusion 424. The first protrusion 414 and the second protrusion 424 are respectively used as toggle points of the first jaw 41 and the second jaw 42, and when the first protrusion 414 and the second protrusion 424 are toggled by hands in use, the first jaw 41 and the second jaw 42 can slide.

Further, as shown in fig. 1, 2 and 6, in the present embodiment, the top and the bottom of the dust-catching cylinder 1 are provided with openings 11, the base 2 is provided with through holes 21, and the positions of the top opening 11, the through holes 21 and the clamping groove 33 correspond to each other. The diameter of the clamping groove 33 is smaller than that of the top opening 11 and the through hole 21, so that when the first clamping block 31 and the second clamping block 32 are turned inwards and buckled together, the size of the clamping groove 33 enclosed by the first clamping block 31 and the second clamping block 32 is matched with that of the drill rod, and good guiding and clamping (limiting) effects on the drill rod can be achieved; when the first and second clamping blocks 31, 32 are turned outwards, the first and second clamping blocks 31, 32 are moved away from each other, so that the larger size impactors and drills can also pass through the top opening 11 and the through-hole 21.

Further, as shown in fig. 1 and 6, in the present embodiment, a dust collection cover 12 is fixed to the bottom of the dust collection cylinder 1, and a dust discharge pipe 13 is provided on the side wall of the dust collection cylinder 1. The top of the dust catching cylinder 1 is provided with a fixing plate 14, the fixing plate 14 is arranged around the periphery of the top opening 11 in a circle, the fixing plate 14 is positioned below the base 2 and is fixedly connected with the base 2, and a dust-proof pad 6 is clamped between the fixing plate 14 and the base 2. In the present embodiment, the fixing plate 14, the dust-proof pad 6 and the base 2 are fixedly connected by bolts.

Specifically, in this embodiment, the dust catching cover 12 is made of rubber, the dust catching cover 12 is fixedly connected with the bottom of the dust catching barrel 1 through a clamp 15, and the dust catching cover 12 is tightly attached to the plane of the drilling hole during the drilling operation, so as to improve the sealing and dust collecting effect. The dust exhaust pipe 13 is connected with a vacuum dust suction device (not shown), and under the action of the vacuum dust suction device, dust generated during drilling is sucked into the vacuum dust suction device from the dust catching cylinder 1, so that the dust suction effect is achieved. The dustproof pad 6 is made of rubber, and the diameter of an opening (not shown) in the dustproof pad 6 is smaller than that of the drill rod, so that the dustproof pad 6 can be tightly attached to the drill rod, and raised dust generated in drilling is effectively prevented from being emitted from the top of the dust catching cylinder 1; meanwhile, the dustproof pad 6 has certain elasticity, so that the drill rod, the drill bit and the impactor can smoothly pass through the open hole in the dustproof pad 6.

Further, as shown in fig. 1 and fig. 2, in the present embodiment, the base 2 is further provided with a guide cylinder 22, and the guide cylinder 22 is arranged around the periphery of the through hole 21. The first clamping block 31 and the second clamping block 32 abut against the guide cylinder 22.

Further, as shown in fig. 1 and 2, in the present embodiment, the dust collecting device further includes a sliding connection mechanism 5, the sliding connection mechanism 5 is fixedly connected with the base 2, and the sliding connection mechanism 5 is provided with a sliding groove 521.

Specifically, in the present embodiment, the sliding connection mechanism 5 includes two connection plates 51 disposed oppositely, the two connection plates 51 are both fixedly connected to the base 2, and a reinforcing plate 53 is further disposed between the two connection plates 51. A slide plate 52 is fixed to each connecting plate 51, a slide groove 521 is provided in the slide plate 52, and an ear plate 54 is fixed to each slide plate 52. The dust catching device also comprises a propelling beam (not shown) and a driving device (not shown, the driving device is generally an oil cylinder), the propelling beam is connected with the drilling machine, the propelling beam is provided with a sliding rail (not shown) matched with the sliding groove 521, the driving device is fixed on the propelling beam and is fixedly connected with the lug plate 54, and under the driving action of the driving device, the dust catching device can move up and down along the sliding rail, so that the dust catching cover 12 is always attached to the plane of the drilling hole, and the sealing dust collection effect is improved.

Specifically, in the present embodiment, the lug plate 54 is fixed to the slide plate 52 by welding, the slide plate 52 is fixedly connected to the connecting plate 51 by a bolt, the connecting plate 51 is fixedly connected to the base 2 by welding, and the connecting block 16 is fixed to the base 2 by welding.

The dust catching device for the drilling machine has the advantages that:

1. by adding the guide sleeve 3, the guide sleeve 3 is provided with the clamping groove 33 for accommodating the drill rod, so that the drill rod can stably work when the drilling machine performs drilling work under the guiding and clamping (limiting) effects of the guide sleeve 3, and the possibility of the drill rod deflection operation is reduced;

2. the first clamping block 31 and the second clamping block 32 are hinged with the base 2, namely the guide sleeve 3 is of a reversible structure, when the first clamping block 31 and the second clamping block 32 are turned inwards and buckled together, the size of a clamping groove 33 formed by the first clamping block 31 and the second clamping block 32 in a surrounding mode is matched with the size of a drill rod, and good guiding and clamping (limiting) effects can be achieved on the drill rod; when the first clamping block 31 and the second clamping block 32 are turned outwards, the clamping effect can be relieved, so that a larger impactor and a larger drill bit (the size of the impactor and the drill bit is larger than that of a drill rod) can also pass through the guide sleeve 3, and the installation and the disassembly are convenient;

3. through set up slidingtype first jack catch 41 and second jack catch 42 in uide bushing 3, after drilling operation is accomplished, when unloading the pole (trade the pole) operation, first jack catch 41 and second jack catch 42 slide along radial inside for first jack catch 41 and second jack catch 42 can replace the spanner to fasten the drilling rod clamp, realize the radial fixed function of drilling rod, in order to prevent that the drilling rod from rotating, make things convenient for the drilling rod to lift off from the rig. The traditional rod unloading (rod replacing) operation needs to manually fix the drill rod by using a wrench, so that the operation difficulty is high, the manpower is wasted, and meanwhile, certain operation danger is caused.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a dust catching device for drilling machine, characterized in that, including dust catching barrel (1), base (2) and uide bushing (3), base (2) with the top fixed connection of dust catching barrel (1), uide bushing (3) are including relative first clamp splice (31) and the second clamp splice (32) that set up, first clamp splice (31) and second clamp splice (32) all are located base (2) top and all with base (2) are articulated, uide bushing (3) are equipped with clamp groove (33), clamp groove (33) are enclosed jointly by first clamp splice (31) and second clamp splice (32) and are formed, clamp groove (33) are used for holding the drilling rod.

2. A dust catching device for a drilling machine according to claim 1, characterized in that the dust catching device further comprises a first claw (41) and a second claw (42), the first claw (41) comprises a first connecting arm (411) and a first clamping arm (412) connected to each other, the first clamping arm (412) is located in the clamping groove (33), and the first connecting arm (411) is slidably connected with the first clamping block (31); the second claw (42) comprises a second connecting arm (421) and a second clamping arm (422), the second clamping arm (422) is located in the clamping groove (33), and the second connecting arm (421) is connected with the second clamping block (32) in a sliding mode.

3. The dust catching device for drilling machine according to claim 2, characterized in that the first clamping block (31) and the second clamping block (32) are both Y-shaped structures, the first clamping block (31) comprises a first rotating portion (311), a first clamping portion (312) and a second clamping portion (313) which are connected with each other, the second clamping block (32) comprises a second rotating portion (321), a third clamping portion (322) and a fourth clamping portion (323) which are connected with each other, the clamping groove (33) is formed by the first clamping portion (312), the second clamping portion (313), the third clamping portion (322) and the fourth clamping portion (323) which are enclosed together, and the first rotating portion (311) and the second rotating portion (321) are arranged corresponding to both sides of the base (2) and are hinged with the base (2).

4. A dust catching device for a drilling machine according to claim 3, characterized in that the first clamping part (312) and the third clamping part (322) and the second clamping part (313) and the fourth clamping part (323) are fixed by means of bolts (34).

5. A dust catching device for a drilling machine according to claim 3, characterized in that the first rotary part (311) is provided with a first chute (314), the first connecting arm (411) being located in the first chute (314) and being slidable along the first chute (314); the second rotating portion (321) is provided with a second sliding groove (324), and the second connecting arm (421) is located in the second sliding groove (324) and can slide along the second sliding groove (324).

6. A dust catching device for a drilling machine according to claim 3, characterized in that a first limiting groove (315) is provided in the first rotation part (311), the first connection arm (411) is provided with a first limiting part (413), and the first limiting part (413) is located in the first limiting groove (315) and can slide along the first limiting groove (315); a second limiting groove (325) is formed in the second rotating portion (321), a second limiting portion (423) is arranged on the second connecting arm (421), and the second limiting portion (423) is located in the second limiting groove (325) and can slide along the second limiting groove (325).

7. A dust catching device for a drilling machine according to claim 2, characterized in that the first jaw (41) is provided with a first protrusion (414) and the second jaw (42) is provided with a second protrusion (424).

8. A dust catching device for a drilling machine as claimed in claim 1, characterized in that the top of the dust catching cylinder (1) is provided with an opening (11), the base (2) is provided with a through hole (21), the position of the opening (11), the through hole (21) and the clamping groove (33) correspond, and the diameter of the clamping groove (33) is smaller than the diameter of the opening (11) and the through hole (21).

9. The dust catching device for the drilling machine as claimed in claim 1, characterized in that the dust catching cover (12) is fixed at the bottom of the dust catching cylinder (1), and the side wall of the dust catching cylinder (1) is provided with a dust exhaust pipe (13); the top of dust catching cylinder (1) is equipped with fixed plate (14), fixed plate (14) be located base (2) below and with base (2) fixed connection, fixed plate (14) with it is equipped with dustproof pad (6) to press from both sides between base (2).

10. A dust catching device for a drilling machine according to claim 1, characterized in that the dust catching device further comprises a sliding connection mechanism (5), the sliding connection mechanism (5) is fixedly connected with the base (2), and the sliding connection mechanism (5) is provided with a sliding groove (521).

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