KR100958306B1

KR100958306B1 - Tool, Grinding Cup Tool, Propeller for Grinding Cup Tool and Core Bit

Info

Publication number: KR100958306B1
Application number: KR1020080030946A
Authority: KR
Inventors: 김수광; 최진선
Original assignee: 이화다이아몬드공업 주식회사
Priority date: 2008-04-02
Filing date: 2008-04-02
Publication date: 2010-05-19
Also published as: KR20090105477A; WO2009145470A2; WO2009145470A3

Abstract

The present invention is a tool, a grinding cup tool, a core drill and a grinding cup tool that can collect dust generated during work such as cutting, drilling, flattening and polishing of brittle workpieces such as stone, brick, concrete and asphalt. Provides a propeller for use.

The present invention is a tool having a core having a fixed tip in which abrasive particles are distributed, and a driving device for driving the core, the tool including two or more wings, which is positioned on the tip and rotates with the core in operation to generate the operation. The subject matter is a tool comprising a propeller, a grinding cup tool and a propeller used in a core drill and grinding cup tool configured to direct the dust to the upper part.

According to the present invention, since dust generated during dry operation can be collected by itself, it is possible to significantly reduce dust (particles) scattered without the need for a separate dust collector, and is also good for collecting and disposing the generated dust in one place. In addition, it is possible to improve the machinability of the product by removing the fine dust generated during cutting.

Tools, Dust Collecting, Grinding, Cups, Cores, Drills, Propellers, Wings

Description

Tool, Grinding Cup Tool, Propeller for Grinding Cup Tool and Core Bit}

The present invention relates to a tool used to cut, drill, planarize, and polish brittle workpieces such as stone, brick, concrete, and asphalt, and more particularly, when cutting, drilling, planarizing, and polishing occurs. The present invention relates to propellers used in tools, grinding cup tools, core drills, and grinding cup tools capable of directing dust to the top.

Recently, high-rise buildings have been built due to the development of the construction industry, and the lifespan of buildings has gradually increased.

As a result, many companies and individual building owners are diagnosed with building safety, and if there are no defects in the building, more and more cases of renovation and remodeling of the old building are used rather than new construction, and the old building repair and remodeling business expands. The market is getting bigger.

As a result, the demand for tools for building repair and remodeling has increased rapidly. Related tool companies are developing and launching new products.

Recently, as the building repair and remodeling industry grows, attention is also focused on the working environment.

In the past, a lot of work was carried out by wet (cutting with water), but after work is inconvenient after treatment and workability is very poor due to the scattering of water during work, and recently, dry (without water) is mainly performed.

Dry work has good aftertreatment and workability, but due to dust scattering during work, it affects the health of workers and pollutes the surrounding environment, resulting in many cases of complaints.

Typical tools commonly used in building repairs and remodeling work include grinding cups and core drills.

As shown in FIG. 1, the grinding cup 10 includes a cup core 11 in which a through slot 13 is formed, and a tip 12 in which abrasive particles are distributed and fixed to a recessed side of the cup core 11. In addition, a fixed shaft through-hole 14 penetrating the fixed shaft of the driving device is formed at the center of the cup-shaped core 11.

As shown in FIG. 2, the core drill 20 has a hollow cylindrical core 21 in which one side is opened and the other is closed, and abrasive particles are distributed, and a periphery 211 of the open side of the core 21. And a tip 22 fixed to it.

The grinding cup and the core drill are mounted and rotated in the apparatus so that the grinding cup flattens the workpiece, and the core drill forms a hole in the workpiece.

That is, the grinding cup is used for, for example, flattening work after repairing a building crack, grinding a new wall, repairing a building floor, and the core drill, for example, to install a building water and sewage pipe and an electric cable. It is used to form a hole in the back.

In the case of working using the grinding cup, a separate dust collector may be used to collect dust generated.

However, when a separate dust collector is used to collect dust generated during the work as described above, there is a problem that it is cumbersome and increases the cost.

Furthermore, in the case of core drill, the situation is being performed without taking any further action.

The present invention is to provide a tool that can guide the dust generated during the dry operation to the top, an object thereof.

Another object of the present invention is to provide a propeller for a grinding cup tool that can guide the dust generated during the dry operation to the top, an object thereof.

Another object of the present invention is to provide a grinding cup tool that can guide the dust generated during the dry operation to the top, an object thereof.

Another object of the present invention is to provide a core drill that can guide the dust generated during the dry operation to the top, the object.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated.

The present invention is a tool having a core having a fixed tip in which abrasive particles are distributed, and a driving device for driving the core, the tool including two or more wings, which is positioned on the tip and rotates with the core in operation to generate the operation. A tool comprising a propeller configured to direct the dust to the top.

The tool may include a grinding cup tool or a core drill.

In addition, the present invention includes a grinding cup including a cup-shaped core in which a through slot is formed and a tip in which abrasive particles are distributed and fixed to a recessed side of the core, and a driving device provided at a position facing the tip to drive the core. It is used for grinding cup tool, which is located between the core and the driving device, including at least two wings, at least a portion of the blade is located inside the through slot to rotate with the core during operation A propeller for a grinding cup tool is configured to direct dust generated upwards.

A preferred propeller for a grinding cup tool of the present invention comprises at least two wings, preferably forming as many wings as the number of through slots in the core.

The vanes are preferably formed to bend in the rotational direction.

At least a portion of the wing is formed to be located in the through slot of the core.

Preferably the size of the portion of the blade located in the slot is such that it is 10-100% of the slot area.

In addition, the tip portion of the blade is preferably to be inserted into the slot by the size of 1/5 to 1.0 of the core thickness (t).

If the tip of the blade is inserted too shallowly in the slot, the dust generated during the operation cannot be led to the upper part sufficiently, and if the blade is inserted too deep, it will come into contact with the tip. It is desirable to be inserted into the slot by the size of 5 to 1.0.

The blade portion inserted into the slot is preferably inclined by about 20 to 60 degrees in the vertical direction.

In addition, the wing is preferably formed so that its width becomes wider in the circumferential direction.

In addition, the blade is preferably bent in the rotational direction at the time of work.

In addition, the present invention includes a grinding cup including a cup-shaped core in which a through slot is formed and a tip in which abrasive particles are distributed and fixed to a recessed side of the core, and a driving device provided at a position facing the tip to drive the core. As grinding cup tool to say,

Including two or more wings are located between the core and the drive unit, at least a portion of the wings are located inside the through slot to rotate with the core during operation to guide the dust generated during operation to the top A grinding cup tool comprising a propeller configured.

In addition, the present invention is a core drill comprising a hollow cylindrical core having one side open and the other closed, a tip in which abrasive particles are distributed and fixed to the periphery of the open side of the core, including two or more wings. A propeller fixed to an upper portion of the hollow part of the core and configured to rotate together with the core during the operation to guide the dust generated during the operation to the upper part, and to close the core, the dust induced by the propeller is hollowed out. It relates to a core drill characterized in that the dust discharge hole is formed to be discharged from the portion.

According to the present invention, since the dust generated during the dry operation can be guided to the upper part, it is possible to significantly reduce the scattered dust (particles) without the need for a separate dust collector, and is also good for collecting and disposing the generated dust in one place. In addition, it is possible to improve the machinability of the product by removing the fine dust generated during cutting.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

Fig. 3 discloses a preferred grinding cup tool of the invention, and Fig. 4

A preferred grinding cup propeller of the present invention is disclosed, and FIGS. 5 and 6 disclose a state in which the preferred grinding cup tool propeller of the present invention is assembled to a grinding cup according to the present invention.

As shown in FIG. 3, the grinding cup tool 100 of the present invention includes a propeller 40 between the grinding cup 10 and the drive 30.

The grinding cup 10 includes a cup-shaped core 11 in which a through slot 13 is formed and a tip 12 in which abrasive particles are distributed and fixed to a recessed side of the core 11.

A fixed shaft through hole 14 is formed at the center of the cup core 11 to penetrate the fixed shaft 31 of the drive device 30.

The core 11 of the grinding cup 10 is driven by a drive device 30 which is provided at a position facing the tip 12.

The drive device includes a fixed shaft 31 for fixing the core to the drive device.

Part of the fixed shaft 31 is spiralized.

Combination of the core 11 and the driving device 30 passes through the fixed shaft 31 of the driving device 30 through the fixed shaft through-hole 14 of the core and then through the fixed shaft 31. This is accomplished by coupling the nut 32 to the threaded portion of the.

On the other hand, the grinding cup tool 100 of the present invention, as shown in Figure 3, is inserted into the fixed shaft through-hole 14 of the cup-shaped core 11 and threaded to be screwed with the fixed shaft in the center It may include a high information tool 33 is formed a screw hole 331.

The propeller 40 for grinding cup tool of the present invention largely includes a fixing portion 41 and a blade 42 as shown in FIG.

The wings 42 form two or more wings, preferably as many as the number of through slots 13 of the core 11.

The shape of the blade 42 is not particularly limited, a part of which is located inside the through slot 13 and rotates together with the core 11 during operation to induce dust generated during operation to the upper portion. If so, any shape is possible.

The material and thickness of the wing 42 can be any material and thickness as long as it can lead to the dust generated during the work.

The blade 42 is preferably formed to be bent in the rotational direction.

At least part of the blade 42 is formed to be located in the through slot 13 of the core 11.

Preferably, as shown in Figs. 5 and 6, the area of the portion of the blade 42 located in the through slot 13 is 10 to 100% of the area of the through slot 13.

The reason why the area of the portion of the blade 42 positioned in the through slot 13 can be 100% of the area of the through slot 13 is that the portion of the blade 42 positioned in the through slot 13 is possible. Because it is inclined.

That is, in the present invention, if the through slot 13 is not blocked by all of the propellers and a small gap exists, the effect of the present invention can be exhibited.

When positioning the propeller 40 between the grinding cup 10 and the drive device 30, the tip 421 of the blade 42 of the propeller 40 has a core as shown in FIGS. 5 and 6. It is desirable to be inserted into the slot by the size of 1/5 to 1.0 of the thickness t.

If the tip portion 421 of the blade 42 is inserted too shallowly in the slot 13, the dust generated at the time of operation cannot be sufficiently led upward, and if it is inserted too deep, it comes into contact with the tip 12, The tip 421 of the blade 42 is preferably inserted into the slot by the size of 1/5 to 1.0 of the core thickness (t).

The wing portion inserted into the slot is preferably inclined at an inclination angle θ of about 20 to 60 degrees as shown in FIG. 4.

In addition, the blade 42 is preferably formed to be wider while going in the outer circumferential direction.

On the other hand, the fixing portion 41 is a through-hole 411 and the core 11 and the core 11 and the driving device 30 when the driving device 30 is configured to penetrate the fixed shaft 31 of the driving device 30 and Compression contact by the drive device 30 includes a coupling portion 412 that serves to fix the propeller 40 between the core 11 and the drive device (30).

The size and shape of the through hole 411 is not particularly limited, and the size and shape of the fixed shaft 31 of the drive device 30 and the size and shape of the fixed shaft through hole 14 of the core 11, and the like. Can be selected accordingly.

7 and 8 show a preferred example of the core drill of the present invention.

The core drill of the present invention is an improvement of the conventional core drill, and as shown in FIGS. 7 and 8, the core drill 50 of the present invention includes a propeller 53 in the hollow portion 513 of the core 51. And a dust discharge hole 5121 is formed in the closed portion 512 of the core 51.

The tip 52 in which the abrasive grains are distributed is fixed to the periphery 511 of the open side of the core 51.

The prepeller 53 is fixed to the upper portion of the hollow portion 513 of the core 51 including two or more wings to rotate with the core 51 during operation to induce dust generated during operation to the top Is configured to.

The number of wings of the preferred prepeller 53 is four or more.

The dust discharge hole (5121) is formed in the closed portion 512 of the core 51 is formed to discharge the dust induced by the propeller 53 from the hollow portion 513 to the outside.

The dust discharge hole (5121) is formed at least one, preferably at least two.

1 is a schematic view showing an example of a conventional grinding cup

2 is a schematic representation of a conventional core drill

3 is an exploded perspective view of a preferred example of a grinding cup tool in accordance with the present invention;

4 is a perspective view showing a preferred example of a propeller for a grinding cup tool according to the present invention;

5 is a configuration diagram showing a state in which a preferred example of a propeller for a grinding cup tool according to the present invention is assembled to a grinding cup.

FIG. 6 is a side cross-sectional view showing a portion cut along the line II ′ of FIG. 5;

7 is an exploded perspective view of a preferred example of a core drill in accordance with the present invention;

8 is a cross-sectional view of a preferred example of a core drill in accordance with the present invention.

Explanation of symbols on the main parts of the drawings

10. . Grinding Cup 20, 50. . Core drill 11, 21, 51. . core

12, 22, 52. . Tip 13. . Through slot 14. . Fixed Shaft Through Hole

30. . Actuator 31. . Fixed shaft 32. . nut

33. . Old Information Zones 40, 53. . Propeller 41. . Fixture

42. . Wings 421. . Tip 411. . Through hole

412. . Couplings 5121. . Dust exhauster

Claims

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A grinding cup tool having a cup-shaped core having a through slot formed therein and a grinding cup including a tip in which abrasive particles are distributed and fixed to a recessed side of the core, and a driving device provided at a position opposed to the tip to drive the core. As used,

Including two or more wings are located between the core and the drive unit, at least a portion of the wings are located inside the through slot to rotate with the core during operation to guide the dust generated during operation to the top Propeller for grinding cup tool

3. The propeller of a grinding cup tool according to claim 2, wherein the number of wings of the propeller is equal to the number of through slots of the core.

The wing of claim 2 or 3, wherein the wing of the propeller is formed to be bent in a rotational direction, at least a portion of the wing is formed to be located in the through slot of the core, and the wing portion inserted into the slot is 20 to. It is inclined at an inclination angle of 60 °, and the wing is propeller for a grinding cup tool, characterized in that the width is formed so as to go in the circumferential direction

5. A blade according to claim 4, wherein the area of the blade portion located in the slot is 10 to 100% of the slot area, and the tip of the blade is inserted into the slot by the size of 1/5 to 1.0 of the core thickness t. Propeller for grinding cup tool, characterized in that

A grinding cup tool having a cup-shaped core in which a through slot is formed and a grinding cup including a tip in which abrasive particles are distributed and fixed to a recessed side of the core, and a driving device provided at a position opposed to the tip to drive the core. ,

Including two or more wings are located between the core and the drive unit, at least a portion of the wings are located inside the through slot to rotate with the core during operation to guide the dust generated during operation to the top Grinding Cup Tool Containing Propeller Composed

The grinding cup tool of claim 6, wherein the number of wings of the propeller is equal to the number of through slots of the core.

The wing of claim 6 or 7, wherein the wing of the propeller is formed to bend in the rotational direction, at least a portion of the wing is formed to be located in the through slot of the core, the wing portion inserted into the through slot is 20 to Grinding cup tool, characterized in that inclined at an inclination angle of 60 °, and the blade is formed to be wider while going in the circumferential direction

9. A blade according to claim 8, wherein an area of a portion of the blade located in the through slot is 10 to 100% of the through slot area, and the tip of the blade is placed in the through slot by a size of 1/5 to 1.0 of the core thickness t. Grinding cup tools, characterized in that inserted

A core drill comprising a hollow cylindrical core, one of which is open and the other of which is closed, a tip in which abrasive particles are distributed and fixed to the periphery of the open side of the core, the core drill comprising two or more vanes. A propeller fixed to the upper part and configured to rotate together with the core during operation to guide the dust generated during the operation to the upper part, and the closed part of the core is configured to discharge dust induced by the propeller from the hollow part Core drill, characterized in that the dust discharge hole is formed