KR102301146B1 - Dry core drill with dust removal function - Google Patents

Abstract

The present invention relates to a dry core drill with a dust removal function, and more specifically to a new-concept technology for completely removing dust, which is generated in the process of drilling concrete, using a dry method by vacuum suction to prevent the dust wetted by water use from contaminating the surroundings. A traditionally disclosed wet core drill causes the problem of allowing dust including moisture to contaminate concrete wall surfaces, indoor wallpaper, oil paper for floor, etc. To solve the problem, the present invention allows dust, which is generated in the process of drilling a concrete wall, to successively pass the inside of a reducer connector, which is connected between a core bit and a reducer unit, and a dust through hole, which is formed to penetrate the inside and the outside, to be collected in a dust collection chamber, which is inserted into the outer side of the reducer connector to be able to rotate freely, and to be discharged to the outside through a dust discharge hole.

Description

Dry core drill with dust removal function

The present invention relates to a technology of a new concept that reliably removes dust generated during drilling of concrete in a dry method by vacuum suction to prevent the phenomenon that wet dust caused by water use contaminates the surroundings.

In general, a core drill is used to drill a concrete structure, rock, etc. while rotating a cylindrical core bit, or to extract a test specimen for strength test from a concrete structure, etc., and an electric motor installed in the drill body; A reduction gear connected to the shaft of the electric motor, a rotary shaft connected to the reduction gear, and a cylindrical bit are coupled to the front of the rotary shaft is a typical structure.

In the conventional core drill, when a drilling operation is performed on an object to be drilled, such as a concrete structure, the drilling operation is performed by frictional contact with the object to be drilled by the high-speed rotating core bit. In this case, it takes a long time to drill a drilled object with strong strength such as mortar concrete or reinforced concrete, resulting in a very large time loss.

Therefore, the worker applies a force to the drilling target and works while pressing the core drill. In this case, the worker's physical fatigue increases and thus the work efficiency is lowered.

As a prior art to solve this problem, "Patent Registration No. 1990801, Title/Core Drill with One-Touch Lock Function of Core Bit", a pre-registered invention of the applicant of the present invention, is disclosed.

In the prior art, in a state in which locking is released by pressing a locking pin resiliently installed in a lock housing fitted on the outside of the spindle, the reducer connector coupled to the core bit is inserted into the connection hole formed in the spindle, and then the locking is automatically maintained when the lock pin is released. provides an effect that

The prior art corresponds to a wet type core drill that removes dust generated during drilling of a concrete wall by spraying water into the core bit. The problem of contamination arises.

The present invention is a means for solving the above problems, and the dust generated when the concrete wall is drilled sequentially passes through the dust through hole formed through the inside, inside and outside of the reducer connector connected between the core bit and the reducer unit. After collecting dust in the dust collecting chamber installed rotatably on the outside of the reducer connector, we seek a technology to discharge it to the outside through the dust outlet.

In addition, the present invention provides a method for allowing dust to smoothly flow into the reducer connector while passing through a plurality of dust passages formed on the outer circumferential surface of the core bit anti-rotation plate inserted inside the core bit to prevent the core bit from oscillating. seek out skills

According to the present invention, using a vacuum suction device connected to the dust chamber, the dust generated when the concrete wall is drilled is collected into the dust collecting chamber and then sucked and discharged to the outside to cleanly remove it, as well as the dry method unlike the existing wet method. As the effect is clear, it provides a special effect of preventing contamination of concrete walls, indoor wallpapers, and veneers when dust is removed.

In addition, the core bit anti-vibration plate inserted into the inner side of the core bit prevents the core bit from oscillating, thereby preventing the occurrence of safety accidents and damage to the core bit and the center support rod, thereby significantly improving durability. Through the dust passage, the dust flows smoothly into the reducer connector, and in particular, the dust passage is aligned with the perforated blade attached to the tip of the core bit, and the core bit anti-vibration plate is inserted into the core bit to avoid interference during the insertion process. It is possible to manufacture a core bit anti-rotation plate with a standard (outer diameter) that is as close as possible to the inner diameter of the bit, providing the effect of more reliably preventing the core bit from shaking.

1 is a perspective view of a dry core drill to which the present invention is applied;
Figure 2 is a front view of the present invention dry core drill
3 is a front cross-sectional view of a dry core drill of the present invention;
Figure 4 is an enlarged cross-sectional view of the dust removal state according to the present invention;
5 is a side cross-sectional view of the assembly state of the reducer connector and the dust chamber of the present invention;
6 is a perspective view of a reducer connector according to the present invention;
7 is a front cross-sectional view of the reducer connector of the present invention;
Figure 8 is a side cross-sectional view of the present invention reducer connector
9 is a perspective view and a front cross-sectional view of a core bit anti-oscillation plate of the present invention;
10 is a side view of a state in which the core bit anti-vibration plate of the present invention is inserted into the core bit;
11 is an enlarged cross-sectional view of the installation state of the dust blocking ring of the present invention;

A preferred embodiment for implementing the means for solving the problem to be solved by the present invention in more detail will be described.

When looking at the overall configuration according to a preferred embodiment of the present invention schematically based on the accompanying drawings, the center support rod 2, the core bit 3, the reducer unit 4 and the actuator 5 are assembled and used in the field. In the drill (1), it can be seen that the reducer connector (10) and the components of the dust collection chamber (20) are largely divided.

Hereinafter, the present invention having the above schematic configuration will be described in more detail to facilitate implementation.

First of all, the core drill 1 of the present invention is to use the center support rod 2, the core bit 3, the reducer unit 4 and the actuator 5 by assembling them in the field, and the configuration of these is the prior art. As disclosed in detail in the present invention, further detailed description will be omitted.

The reducer connector 10 serves as a medium for integrally connecting the core bit 3 and the reducer unit 4 to each other. It is screwed into one side of (3), and the other side is automatically locked after being fitted and assembled in the reducer unit (4), and the support bar through hole (12) so that the center support bar (2) can pass through the center of both sides This is formed, and one or more dust through-holes 14 are radially formed in the chamber coupling part 13 formed in the center of the outer circumferential surface to penetrate inside and outside.

A dust collecting chamber 20 fitted with a pair of bearings 21 on both sides is rotatably fitted to the outside of the chamber coupling part 13, and the dust through-hole 14 and the inner peripheral surface between the bearings 21 A dust collecting groove 22 that communicates with each other is recessed, and a dust outlet 23 communicating with the dust collecting groove 22 and connected to a separate vacuum aspirator is formed at the lower end, thereby connecting the vacuum sucker to the dust outlet 23 Thus, it is possible to remove the dust generated when the concrete (C) is drilled by vacuum suction.

Here, since a vacuum suction device widely used in the market can be used, a separate detailed description thereof will be omitted in the present invention.

According to the present invention, the dust generated in the core bit 3 when the concrete C is drilled by the vacuum suction force of the vacuum suction device connected to the dust outlet 23 is the center support rod 2 and The gap between the support rod through-holes 12 and the dust through-holes 14 are sequentially passed through, the dust is collected into the dust collecting groove 22, and then the dust is discharged to the outside through the dust outlet 23, so that it can be removed neatly.

Therefore, unlike the existing wet method, it is a dry method that does not use any water for dust removal, but the effect of removing dust is certain. .

The dust collection chamber 20 is a method for preventing dust from flowing into the bearing 21 during the dust removal process, and as shown in FIG. 11, a dust blocking ring 25 and By inserting the washer 26, the dust collected into the dust collecting groove 22 is blocked from flowing toward the bearing 21 to prevent dust from flowing into the dust collecting chamber 20 even when the speed reducer connector 10 rotates. does not rotate together like a rotary joint, so that the vacuum hose connected to the dust outlet 23 can be prevented from being twisted.

In addition, the reducer connector 10 is a technology in which the dust dispersion path 15 is additionally recessed along the circumferential direction on the inner peripheral surface of the part where the dust through hole 14 is formed, so that the dust is dispersed along the dust dispersion path 15. By smoothly dispersing into the plurality of dust through holes 14 while rotating, the effect of dust removal is greatly improved.

On the other hand, in the present invention, the core bit rocking prevention plate 30 close to the inner diameter of the core bit 3 on the outside of the center support rod 2 as shown in FIG. 3 adjacent to the perforation blade 3a of the core bit 3 This fitting is installed.

And the core bit anti-vibration plate 30 is manufactured in a number of different standards to fit the various standards (diameters) of the core bit 3, so that the core bit anti-vibration plate 30 is suitable for the standard of the core bit 3 If you select and use , the core bit (3) effectively prevents the needle from swinging up and down during work, making it easy for the core bit (3) to enter the concrete (C), preventing the occurrence of safety accidents, and the core bit (3) And it provides a special effect of significantly improving durability by preventing damage to the center support bar (2) and the like.

In addition, a plurality of dust passages 31 are radially formed on the outer circumferential surface and the center of the core bit shaking prevention plate 30 , and the dust passes through the dust passage 31 smoothly into the inside of the reducer connector 10 . The inflow prevents the core bit rocking prevention plate 30 from blocking the dust path.

The dust passage 31 formed on the outer circumferential surface of the core bit anti-vibration plate 30 has a limited configuration formed in the same number of positions as the perforation blades 3a attached to the tip of the core bit 3, so that the core When inserting the bit rocking prevention plate 30 into the inside of the core bit 3 as shown in FIG. 10, the dust passage 31 is inserted in a state aligned with the perforation blade 3a to prevent interference. In addition, the core bit anti-rotation plate 30 can be manufactured with a standard (outer diameter) that is as close as possible to the inner diameter of the core bit 3, providing a special effect of more reliably preventing the fluctuation of the core bit 3 during drilling. do.

C: Concrete 1: Core Drill
2: Center support bar 3: Core bit
3a: perforated blade 4: reducer unit
5: Actuator 10: Reducer connector
12: support bar through hole 13: chamber coupling part
14: dust through hole 15: dust collection and dispersion furnace
20: dust collection chamber 21: bearing
22: dust collection groove 23: dust outlet
24: ring groove 25: dust blocking ring
30: core bit rocking plate 31: dust passage

Claims (5)

In the core drill (1) used by assembling the center support bar (2), the core bit (3), the reducer unit (4) and the actuator (5) on site,
It is screwed to one side of the core bit (3), the other side is fitted to the reducer unit (4), and the support rod through hole (12) is formed through the center of both sides, and the chamber coupling part (13) formed in the center of the outer circumferential surface Radially one or more dust through-holes 14 are formed through the inner and outer reducer connectors 10 and;
A dust collecting groove 22 that is rotatably fitted on the outside of the chamber coupling part 13 and communicates with the dust through hole 14 is recessed along the circumferential direction on the inner circumferential surface, and communicates with the dust collecting groove 22 at the lower end. Meanwhile, the dust collecting chamber 20 is formed with a dust outlet 23 connected to the vacuum aspirator;
A dry core drill with a dust removal function, characterized in that a dust dispersing path (15) is recessed along the circumferential direction on the inner peripheral surface of the portion where the dust through hole (14) is formed.
The method of claim 1,
The dust generated in the core bit 3 is discharged to the outside through the gap between the center support rod 2 and the support rod through hole 12, the dust through hole 14, the dust collecting groove 22 and the dust outlet 23. A dry core drill with a dust removal function, characterized in that it is removed.
delete In the core drill (1) used by assembling the center support bar (2), the core bit (3), the reducer unit (4) and the actuator (5) on site,
It is screwed to one side of the core bit (3), the other side is fitted to the reducer unit (4), and the support rod through hole (12) is formed through the center of both sides, and the chamber coupling part (13) formed in the center of the outer circumferential surface Radially one or more dust through-holes 14 are formed through the inner and outer reducer connectors 10 and;
A dust collecting groove 22 that is rotatably fitted on the outside of the chamber coupling part 13 and communicates with the dust through hole 14 is recessed along the circumferential direction on the inner circumferential surface, and communicates with the dust collecting groove 22 at the lower end. Meanwhile, the dust collecting chamber 20 is formed with a dust outlet 23 connected to the vacuum aspirator;
A core bit rocking prevention plate 30 close to the inner diameter of the core bit 3 is fitted on the outside of the center support bar 2 adjacent to the perforation blade 3a of the core bit 3, and the core bit swinging A dust passage 31 is radially formed on the outer circumferential surface of the prevention plate 30, and the dust passes through the dust passage 31 and smoothly flows into the reducer connector 10. Equipped with dry core drill.
5. The method of claim 4,
The dust passages 31 are formed in the same number of positions as the perforated blades 3a attached to the tip of the core bit 3 , and the core bit anti-vibration plate 30 is inserted into the core bit 3 . Dry core drill with a dust removal function characterized in that the time dust passage 31 is inserted in a state aligned with the drilling blade 3a to prevent interference.

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