KR102028856B1 - Dust collecting device and perforation device including the same - Google Patents

Abstract

The present invention relates to a dust collecting device and a drilling device including the same and, more specifically, to a dust collecting device and a drilling device including the same which can suck dust created in a process of performing drilling work. According to the present invention, the dust collecting device comprises: a handle part installed on a drill shaft; and a covering part connected to an end of the handle part. The handle part includes: a first body part including a through hole penetrated by the drill shaft; a first connecting part formed on an end of the body part for connection to the covering part; and a bearing part arranged between the first body part and the drill shaft. The covering part includes: a second body part wherein a second connecting part for connection to the first body part is formed on one side thereof, and the other side thereof is opened; and a suction part which is formed on a side wall of the second body part, and includes a suction hole.

Description

Dust collector and perforation device including the same {DUST COLLECTING DEVICE AND PERFORATION DEVICE INCLUDING THE SAME}

The present invention relates to a dust collector and a perforation apparatus including the same.

More specifically, the present invention relates to a dust collecting device capable of sucking dust generated in the process of performing the drilling operation, and a drilling device comprising the same.

In general, when drilling plumbing work such as air conditioner indoors, the ceiling or wall is drilled. In this case, when drilling with the drill, dust is scattered, not only to cloud the indoor air, but also dust is directly introduced into the worker's respirator. It causes a variety of respiratory diseases, in addition to the respiratory tract can enter the eye can cause various eye diseases.

To prevent this, even in the hot summer, the user must wear a separate mask or goggles, not only to cause inconvenience, but also to have a cumbersome problem of having a separate mask or goggles.

As a conventional technology for solving such a problem, Korean Patent No. 10-0830049 [Document 1] is a technology for applying a transparent vinyl dust filter made of a transparent soft vinyl to the drilling device for dust collection in the drilling operation Posting configuration.

However, the technique according to the literature 1 has the trouble of replacing the transparent vinyl dust filter when a large amount of dust is generated.

As another conventional technology for solving the above problems, Korean Patent Laid-Open Publication No. 10-2018-0126999 [Patent 2] is coupled to one side of the drill bit and provided with an inlet and an outlet, and separates dust and gas through rotational driving force. It discloses a technical configuration including a dust collecting unit for receiving dust and the dust collecting unit connected to one side of the dust collecting unit to prevent the spread of dust generated by the rotational driving force and the drill bit and to transfer the dust to the suction port.

However, in the technique according to Document 2, when a large amount of dust is generated, it is troublesome to separate the dust to separate the dust collector and to resume work after removing the dust.

In another prior art for solving the above problems, Korean Utility Model Publication No. 20-2008-0005289 [Document 3] is to closely adhere to the dust collector for the drilling drill on the wall, and insert the drill through the through-hole formed in the dust collector The technical configuration of the drilling work is posted.

However, in the technique according to the document 3, there is a problem that dust may leak into the gap between the dust collector and the drill.

[Document 1] Republic of Korea Patent No. 10-0830049 [Document 2] Republic of Korea Patent Publication No. 10-2018-0126999 [Document 2] Korean Utility Model Model No. 20-2008-0005289

It is an object of the present invention to provide a dust collecting device that can effectively and continuously inhale dust generated in the process of carrying out a drilling operation, and a fabric mill including the same.

In addition, an object of the present invention is to provide a dust collecting device and a fabric mill including the same, which is easy to post-treatment during or after drilling.

The dust collecting device according to the present invention includes a handle part installed on a drill axis and a cover part connected to an end of the handle part. The handle part penetrates through the drill axis. A first body part including a hole, formed at an end of the body, and disposed between a first connecting part for connecting to the cover part and between the first body and the drill shaft; The bearing part includes a bearing part, and the cover part has a second connecting part for connection with the first body on one side thereof, and an open second body part on the other side thereof. And an inhalation part formed on a side wall of the second body and including an inhalation hole.

In addition, a first groove having a concentric shape is formed inside the first body, the bearing portion is disposed in the first groove, and the bearing portion is an inner race, an outer race, and the A bearing including a rolling part disposed between an inner ring and an outer ring, the bearing having a concentric shape, disposed adjacent to the bearing in a longitudinal direction of the drill axis, and facing the drill axis; An O-ring cabinet including a second hollow and an o-ring disposed in the second groove of the o-ring cabinet and extending more than the o-ring cabinet toward the drill axis. have.

In addition, the side of the o-ring cabinet may correspond to the inner ring of the bearing, the diameter of the o-ring cabinet may be smaller than the diameter of the outer ring of the bearing.

In addition, in the longitudinal direction of the drill shaft, the bearings may be disposed on both sides of the O-ring cabinet, respectively, or in the longitudinal direction of the drill shaft, the bearing may be located between the O-ring cabinet and the cover part.

In addition, a third groove (Third Hollow) of the concentric shape is formed in the drill shaft, the O-ring may correspond to the third groove.

The cover part may further include a cap part for opening and closing the suction hole, and a suction device may be connected to the suction hole.

In addition, the cover part may be disposed on the other side of the second body, and may further include an adhesive part having ductility.

The second main body may include a first sub body part and a first sub body part connected to the first sub body, and the first sub body may include the second sub body part. Located between the sub main body and the handle portion, the suction hole is formed in the first sub main body, the length of the first sub main body in the longitudinal direction of the drill axis may be shorter than the length of the second sub main body.

The handle part may further include a bent part formed on an outer surface of the first body, and may further include an elastic part disposed between the first sub body and the second sub body.

The fabric mill according to the present invention includes a drill axis, a drill part including a drill disposed at an end of the drill axis, and a dust collection part connected to the drill part. The dust collecting part may include a handle part installed on a drill axis and a covering part connected to an end of the handle part, and the handle part may include a through hole through which the drill axis passes. A first body including a first body part, a first connecting part formed at an end of the main body, and a bearing disposed between the first body and the drill shaft; And a covering part, wherein the cover part has a second connecting part for connection with the first body on one side, and an open second body part on the other side; Sidewalls of the second body It may be formed in the ll, and may include an inhalation part including an inhalation hole.

In the present invention, the dust collector and the cloth mill including the same have an effect of effectively inhaling dust generated even when a large amount of dust is generated to prevent scattering of dust.

In addition, the dust collector and the cloth mill including the same according to the present invention has the effect of easy operation and post-treatment by handling the dust collector using the handle portion during or after the drilling operation.

1 to 3 are views for explaining the drilling device according to the present invention.
4 to 17 are views for explaining the handle portion.
18 to 22 are views for explaining the cover portion.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the dust collecting device and the drilling device including the same according to the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. It is not intended to limit the invention to the specific embodiments, it can be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing the present invention, terms such as first and second may be used to describe various components, but the components may not be limited by the terms. The terms may be used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

The term and / or may include a combination of a plurality of related items or any item of a plurality of related items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected or connected to that other component, but other components may be present in between. Can be understood. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it may be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions may include plural expressions unless the context clearly indicates otherwise.

In this document, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It may be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries may be interpreted to have meanings consistent with the meanings in the context of the related art, and shall be interpreted in ideal or excessively formal meanings unless expressly defined in the present application. It may not be.

In addition, the embodiments disclosed in this document are provided to more fully describe those skilled in the art, and shapes and sizes of elements in the drawings may be exaggerated for clarity.

In the following description of the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description may be omitted.

Hereinafter, the first direction DR1 may cross (vertical) the second direction DR2.

Here, the first direction DR1 may mean a longitudinal direction, and the second direction DR2 may mean a width direction.

1 to 3 are views for explaining the drilling device according to the present invention.

1, the drilling apparatus 10A according to the present invention may include a drill part 2A and a dust collection part 1A.

The drill portion 2A can drill a hole in a wall or the like. To this end, the drill portion 2A may include a drill body 30, a drill axis 31, and a drill 32 disposed at an end of the drill axis 31.

The drill body 30 may include power means such as a motor, power supply means such as a battery, and the like.

The drill shaft 31 is connected to the power means of the drill body 30 and can rotate.

The drill shaft 31 may be a rotary motion only, it may be possible to perform a rotary motion and the forward / backward movement together.

The drill 32 may form a hole in a wall or the like according to the rotation of the drill shaft 31.

The operator can drive the drilling device 10A according to the present invention in close contact with the wall 50 for forming the hole, as shown in FIG. 2.

Then, while forming a hole in the wall 50, it is possible to effectively collect and remove the dust generated.

The type of drill portion 2A that can be applied to the present invention can vary. For example, in the present invention, the drill part 2A may be applied to various types such as a core drill, an impact drill, a hammer drill, and the like.

In this document, it is assumed that the drill portion 2A is a core drill type.

When the drill portion 2A is a core drill type, the drill 32 may be a core bit.

The dust collecting part 1A is connected to the drill part 2A, and can collect the foreign matter (dust), such as dust which may arise at the time of the drilling operation of the drill part 2A.

To this end, although not shown, a suction device such as a vacuum cleaner may be connected to the dust collecting part 1A.

The dust collecting part 1A may include a handle part 10 and a cover part 20 as shown in FIG. 3.

The handle portion 10 may be installed on the drill shaft 31.

Such a handle portion 10 may facilitate handling of the drilling device 10A during or after the drilling operation.

For example, the operator may help the dust generated by grabbing the handle portion 10 and shaking the dust collector 1A during or after the drilling operation to be easily sucked into the suction device (not shown).

In addition, the handle portion 10 can prevent the dust collecting portion 1A from being separated from the drill portion 2A during the drilling operation.

For example, even if the worker grasps the handle portion 10 and shakes the dust collecting portion 1A during or after the drilling operation, the dust collecting portion 1A may not be easily separated from the drill portion 2A.

The cover part 20 may prevent dust from occurring during the drilling operation so as not to spread to the outside.

To this end, it may be desirable to ensure sufficient space between the lid 20 and the drill shaft 31 or drill 32.

For example, the width W2 of the lid 20 in the width direction (second direction DR2) may be larger than the width W1 of the handle 10.

In addition, the cover portion 20 may cover the drill 32 to control the dust more effectively.

Hereinafter, the dust collecting part 1A will be described in detail with reference to the accompanying drawings.

4 to 17 are views for explaining the handle portion. Hereinafter, the description of the above-described parts may be omitted.

Referring to (A) and (B) of FIG. 4, the handle part 10 of the dust collecting part 1A includes a first body part 11, a first connecting part 12, and a bearing part. Part 13) may be included.

FIG. 4A is a view showing a cross section of the first main body 11, and FIG. 4B is a view showing a cross section in a state where the bearing portion 13 is disposed on the first main body 11. .

In addition, the handle part 10 may further include a first groove 14 and a bent part 15.

The first body 11 may form an overall frame of the handle portion 10.

The first body 11 may include a through hole H1 through which the drill shaft 31 penetrates in the longitudinal direction (first direction DR1).

The first connection part 12 is formed at the end of the main body 11 and may be used for connection with the cover part 20. For this purpose, it is possible for the first connection part 12 to comprise a thread.

The bent part 15 may be formed on an outer surface of the first body 11 and may allow an operator to easily grasp the handle part 10.

The bearing portion 13 may allow the drill shaft 31 to rotate smoothly without being disturbed by the first body 11. To this end, the bearing portion 13 may be disposed between the first body 11 and the drill shaft 31.

The bearing parts 13 may be disposed at both ends of the first body 11, respectively.

In order to stably arrange the bearing part 13 in the first main body 11, a first groove 14 having a concentric shape may be formed inside the first main body 11.

The bearing part 13 may be disposed in the first groove 14.

The bearing part 13 may include a bearing 130, an O-ring cabinet 131, and an O-ring 132 as shown in FIG. 5.

The bearing 130 may allow the drill shaft 31 to rotate smoothly. The bearing 130 is disposed between an inner race 130a, an outer race 130b and an inner race 130a and an outer race 130b and includes at least one roller or ball. It may include a rolling part (130c).

Here, the inner ring 130a and the outer ring 130b may be independently rotated with the rolling part 130c interposed therebetween.

5, 6, and 7, the O-ring cabinet 131 has a concentric shape, and may be disposed adjacent to the bearing 130 in the longitudinal direction (first direction DR1) of the drill shaft 31.

In addition, the O-ring cabinet 131 may include a second hollow 131a facing the drill shaft 31. For example, the cross section of the O-ring cabinet 131 may have a 'c' shape in which one side is opened and the other side is closed. In another aspect, the O-ring cabinet 131 may have a form of a car tire.

The O-ring 132 may include a material having ductility such as rubber and synthetic resin, and may be installed in the O-ring cabinet 131. In detail, the O-ring 132 may be installed in the second groove 131a of the O-ring cabinet 131.

The O-ring 132 may be firmly fixed to the O-ring cabinet 131. Accordingly, the O-ring cabinet 131 may also rotate together with the rotation of the O-ring 132.

Here, the O-ring cabinet 131 may include a material having a harder property than the material of the O-ring 132. For example, the O-ring cabinet 131 may include a metal material. Accordingly, the O-ring cabinet 131 may have a stronger resistance to friction than the O-ring 132.

In addition, as shown in FIG. 7, the O-ring 132 may extend further by a predetermined length d1 than the O-ring cabinet 131 toward the drill shaft 31. In other words, the O-ring 132 may protrude more than the O-ring cabinet 131 with the O-ring 132 installed in the second groove 131a of the O-ring cabinet 131.

Referring to FIG. 8, the bearing 130 and the O-ring cabinet 131 may be disposed adjacent to each other in the first groove 14 of the first body 11. Accordingly, the bearing 130 and the O-ring cabinet 131 may be adjacent to each other in the longitudinal direction (first direction DR1).

In another aspect, the side surface SS1 of the O-ring cabinet 131 in the longitudinal direction (first direction DR1) may correspond to the inner ring 130a of the bearing 130.

In detail, in the state in which the drill shaft 31 is installed in the through hole H1 of the first main body 11, the side surface SS1 of the O-ring cabinet 131 in the longitudinal direction (first direction DR1) is bearing It may overlap with the inner ring 130a of 130 and may not overlap with the outer ring 130b.

To this end, the diameter R1 of the O-ring cabinet 131 may be smaller than the diameter R2 of the outer ring 130b of the bearing 130.

In this state, the O-ring 132 installed in the O-ring cabinet 131 may be in close contact with the drill shaft 31.

Accordingly, when the drill shaft 31 rotates, the O-ring 132 and the O-ring cabinet 131 rotate, and the side surface SS1 of the O-ring cabinet 131 and the side surface of the inner ring 130a of the bearing 130 are rotated. The inner ring 130a may rotate by friction. On the other hand, the outer ring 130b of the bearing 130 may not rotate.

As such, the O-ring 132 and the O-ring cabinet 131 are firmly fixed so that the inner ring 130a is caused by friction between the side surface SS1 of the O-ring cabinet 131 and the side surface of the inner ring 130a when the drill shaft 31 rotates. Because of the rotation, the consumption of the O-ring 132 having a relatively soft property can be suppressed. Accordingly, the replacement cycle of the O-ring 132 can be increased, thereby reducing management costs and improving reliability.

In order to smoothly rotate the O-ring cabinet 131 when the drill shaft 31 is rotated, the O-ring cabinet 131 and the main body 11 in the longitudinal direction (first direction DR1) in the first groove 14. It may be desirable to secure a predetermined interval g2 therebetween. In addition, it may be preferable that a predetermined distance g1 is also secured between the O-ring cabinet 131 and the main body 11 in the width direction (second direction DR2) in the first groove 14.

Since the bearing 130 having the outer ring 130b having a larger diameter than the O-ring cabinet 131 is disposed in the first groove 14 together with the O-ring cabinet 131, the bearing 130 has a longitudinal direction (first The distance g2 between the O-ring cabinet 131 and the main body 11 in one direction DR1) is the distance g1 between the O-ring cabinet 131 and the main body 11 in the width direction (second direction DR2). It is possible to be smaller than).

Referring to FIG. 9, the drill shaft 31 may have a third concentric third groove 31a, and the O-ring 132 may correspond to the third groove 31a.

In detail, at least a part of the portion protruding from the O-ring cabinet 131 of the O-ring 132 may be inserted into the third groove 31a.

In this case, the handle portion 10 on the drill shaft 31 can be more easily and accurately aligned. In addition, the O-ring 132 and the O-ring cabinet 131 may be effectively rotated together with the drill shaft 31.

Referring to FIG. 10, the first groove 14 may include a first portion 14a and a second portion 14b.

Here, the first portion 14a may correspond to the bearing 130, and the second portion 14b may correspond to the O-ring cabinet 131.

In addition, the depth h1 of the first portion 14a may be deeper than the depth h2 of the second portion 14b.

In this case, the O-ring cabinet in the longitudinal direction (first direction DR1) within the second portion 14a, considering that the operator mainly exerts a force in the longitudinal direction (first direction DR1) during the drilling operation. The distance g2 between the 131 and the main body 11 may be larger than the distance g3 between the O-ring cabinet 131 and the main body 11 in the width direction (second direction DR2).

Looking at the positional relationship between the O-ring cabinet 131 and the bearing 130 on the drill shaft 31, the bearing 130 in the longitudinal direction (first direction DR1) of the drill shaft 31 and the O-ring cabinet 131 It may be located between the cover portion 20.

Alternatively, it may be possible to arrange the bearing 130 on both sides of the O-ring cabinet 131.

For example, as in the case of FIG. 11, the bearing 130 may be disposed at both sides of the O-ring cabinet 131 in the longitudinal direction (first direction DR1) of the drill shaft 31.

In this case, it may be possible to apply the force freely in either direction before or after.

In the present invention, the shape of the O-ring cabinet 131 may be variously changed.

For example, as shown in FIGS. 12 to 13, the O-ring cabinet 131 includes a first vertical extension part 131b and a longitudinal direction (first direction DR1) extending in the width direction (second direction DR2). The first horizontal extension part 131c extending in the first direction, the second vertical extension part 131d extending in the width direction (second direction DR2), and the second horizontal extension part extending in the longitudinal direction (first direction DR1). It may include an extension 131e.

One end of the first vertical extension 131b may face the drill shaft 31, and the other end of the first vertical extension 131b may be connected to one end of the first horizontal extension 131c.

The other end of the first horizontal extension 131c may be connected to one end of the second vertical extension 131d.

The other end of the second vertical extension 131d may face the drill shaft 31 and be connected to one end of the second horizontal extension 131e.

The other end of the second horizontal extension part 131e may face the cover part 20.

Here, the first vertical extension part 131b, the first horizontal extension part 131c, and the second vertical extension part 131d may form a second groove 131a.

The second horizontal extension part 131e may correspond to the inner ring 130a of the bearing 130. In detail, as shown in FIG. 14, the second horizontal extension part 131e may be located between the inner ring 130a and the drill shaft 31. In addition, the second horizontal extension part 131e may be in contact with the inner ring 130a.

In this case, when the drill shaft 31 rotates, the O-ring cabinet 131 may rotate, and the inner ring 130a of the bearing 130 may rotate by the second horizontal extension 131e.

As such, the O-ring cabinet 131 may correspond to the inner surface of the inner ring 130a. In other words, the second horizontal extension 131e of the O-ring cabinet 131 may correspond to the inner surface of the inner ring 130a of the bearing 130. Here, corresponding may mean contact.

15A and 15B, the handle part 10 may further include a bent part 15 connected to the main body 11.

Comparing FIG. 15A and FIG. 15B, it can be seen that the shape of the bent portion 15 is different.

Such a bent portion 15 may help the operator to grab the handle portion 10 more easily.

Here, in order to make it easy to hold the handle portion 10, the bent portion 15 may include a material having a relatively soft nature compared to the first body (11). For example, the bent portion 15 may include a material having relatively soft properties such as plastic and silicon, and the first body 11 may include a metal material.

The bent portion 15 in the handle portion 10 can be separated.

To this end, as shown in FIG. 16, the first body 11 may include a cutout portion 11a in which a portion of the first body 11 is cut so that a portion of the through hole H1 is exposed.

In this case, in the state where the drill shaft 31 is inserted into the through hole H1, a part of the drill shaft 31 may be exposed through the cutout 11a.

In addition, the first main body 11 may be provided with a fastening groove 11b to which fastening means SC, such as a screw and a screw.

The bent portion 15 may have a fastening hole 15b corresponding to the fastening groove 11b.

As the fastening means SC penetrates the fastening hole 15b of the bent part 15 and is fastened to the fastening groove 11b of the first body 11, the bent part 15 is cut out of the first body 11. 11a).

Meanwhile, a first spring groove 11c may be formed in the first body 11, and a second spring groove 15b corresponding to the first spring groove 11c may be formed in the bent portion 15.

The spring part SPR may be disposed between the first spring groove 11c and the second spring groove 15b.

In this case, elasticity can be imparted to the bent portion 15.

For example, when the operator applies the force by holding the handle portion 10, as shown in FIG. 17A, the bent portion 15 may be in close contact with the first body (11).

In this case, the bent portion 15 may contact the drill shaft 31 penetrating the through hole H1 of the first body 11. Thereby, the worker can shake off dust 1A more strongly in the state which gripped the bent part 15, and shake off dust.

On the other hand, when the operator removes the force applied to the handle portion 10, as shown in FIG. 17B, the bent portion 15 may be separated from the first body 11 by a predetermined distance d2.

In this case, the bent portion 15 is separated from the drill shaft 31, so that the drill shaft 31 can rotate smoothly.

18 to 22 are views for explaining the cover portion. Hereinafter, the description of the above-described parts may be omitted.

Referring to FIG. 18, the cover part 20 may include a second body part 21 and an inhalation part 22. In addition, the cover part 20 may further include an adhesion part 24.

A second connecting part 23 may be formed at one side of the second main body 21 for connection with the first main body 11 of the handle part 10.

The second connection part 23 may be connected to the first connection part 12 of the first body 11. To this end, the first connecting portion 12 may include a first threaded portion (not shown), and the second connecting portion 23 may include a second threaded portion (not shown) corresponding to the first threaded portion. .

The other side of the second body 21 may be in an open form.

The drill 32 is exposed at the other side of the second main body 21, and the exposed drill 32 may proceed with the drilling operation.

The close contact portion 24 of the cover portion 20 is disposed on the other open side of the second body 21, may have a ring shape, and may include a material having ductility. For example, the adhesion part 24 may include a material having ductility, such as a rubber material, a resin material, and a silicon material.

The adhesion part 24 can make the 2nd main body 21 adhere to the object of the drilling operation | work, such as a wall. As a result, it is possible to suppress the outflow of dust generated during the drilling operation to the outside.

The suction part 22 may be formed on a side wall of the second body 21 and may include an suction hole 22a.

19, a suction device 40 such as a vacuum cleaner may be connected to the suction hole 22a.

The suction device 40 may suck and remove dust collected in the cover 20.

Accordingly, even if a large amount of dust occurs, the worker may be able to proceed with the continuous drilling for a relatively long time using the drilling device (10A) according to the present invention.

In addition, the suction part 22 of the cover part 20 may further include a cap part 22b. The stopper portion 22b may be used to open and close the suction hole 22a.

For example, in a situation where the puncturing apparatus 10A according to the present invention is not used or the like, the suction hole 22a can be blocked using the stopper portion 22b as shown in FIG. 19A. .

On the other hand, in the case where the drilling operation is performed using the drilling apparatus 10A according to the present invention, as shown in FIG. 16B, the plug portion 22b is removed from the suction hole 22a, and the suction hole ( It is possible to connect the suction device 40 to 22a).

Referring to FIG. 20, the second main body 21 of the cover part 20 is connected to a first sub body part 21a and a first sub body part 21a. , 21b).

Here, the first sub main body 21a may be located between the second sub main body 21b and the handle part 10.

The suction hole 22a may be formed in the first sub main body 21a.

In addition, the length L1 of the first sub main body 21a may be shorter than the length L2 of the second sub main body 21b in the longitudinal direction (the first direction DR1) of the drill shaft 31.

Thus, the division of the 2nd main body 21 into the 1st sub main body 21a and the 2nd sub main body 21b is the case where the drill 32 entered deeply enough in the drilling object, such as a wall, at the time of a drilling operation, This is to prevent dust from spilling when starting work. To this end, as shown in FIG. 21, an elastic part 26 may be further disposed between the first sub main body 21a and the second sub main body 21b of the second main body 21.

Referring to FIG. 21, a body groove 21aH into which an end of the second sub body 21b may be inserted may be formed at an end of the first sub body 21a. FIG. 21 is an enlarged view of the first area AR1 in FIG. 20.

In the main body groove 21aH, an elastic portion 26 such as a spring may be disposed.

Although only the case where the elastic portion 26 is a spring type is shown here, any type may be used as long as it has elasticity that contracts when a force is applied and recovers when the force is removed.

In addition, a protrusion 21bP may be formed at an end of the second sub main body 21b to prevent the main body groove 21aH from being separated from the main body groove 21aH.

The protruding portion 21bP may be disposed above the elastic portion 26 in the body groove 21aH.

The elastic part 26 can push the protrusion part 21bP in the main body groove 21aH.

For example, in a state where a force is not applied to the second main body 21, as shown in FIG. 22A, the second main body 21 in the longitudinal direction (first direction DR1) of the drill shaft 31. L3 may be relatively long. In this case, the elastic portion 26 is extended sufficiently long, and thus the protrusion 21bP can be located at a position close to the inlet of the main body groove 21aH.

FIG. 22A may correspond to a situation in which a drilling operation is started or a case where a depth of a hole formed in the drilling operation is relatively small.

On the other hand, when a force is applied to the second main body 21 in the direction of the arrow, the elastic portion 26 is compressed, whereby the protrusion 21bP may be located at a position close to the bottom of the main body groove 21aH. have.

In this case, as shown in FIG. 22B, the length L4 of the second main body 21 in the longitudinal direction (first direction DR1) of the drill shaft 31 may be relatively short.

FIG. 22B may correspond to a case in which a depth of a hole formed by sufficiently performing the drilling operation is relatively large.

As such, the technical configuration of the present invention described above can be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the foregoing detailed description, and the meaning and scope of the claims are as follows. And all changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

Claims (10)

A handle part installed on a drill axis; And a cover part connected to the end of the handle part. Including,
The handle portion may include a first body including a through hole through which the drill shaft passes; A first connecting part formed at an end of the main body and connected to the cover part; And a bearing part disposed between the first body and the drill shaft.
The cover part has a second connecting part (Second Connecting Part) for connecting to the first body on one side, the other side (Open) Second body (Second Body Part); And an inhalation part formed on a side wall of the second body and including an inhalation hole.
Concentric first grooves (First Hollow) is formed inside the first body,
The bearing portion is disposed in the first groove,
The bearing part includes a bearing including an inner race, an outer race, and a rolling part disposed between the inner and outer races; An O-Ring cabinet having a concentric shape and disposed adjacent to the bearing in a longitudinal direction of the drill axis, the metal O-ring cabinet including a second hollow toward the drill axis; And an O-ring disposed in the second groove of the O-ring cabinet and extending more than the O-ring cabinet toward the drill axis.
The side of the o-ring cabinet corresponds to the inner ring of the bearing,
The diameter of the o-ring cabinet is smaller than the diameter of the outer ring of the bearing to overlap the inner ring of the bearing and do not overlap the outer ring of the bearing,
When the drill shaft is rotated, the O-ring cabinet rotates with the O-ring, the inner ring of the bearing may rotate by friction with the side of the O-ring cabinet,
In the first groove, a predetermined distance is secured in the longitudinal direction and the width direction between the O-ring cabinet and the first body.
The drill shaft is formed with a third hollow (Third Hollow) of concentric form,
And a part of the portion protruding from the O-ring cabinet in the O-ring is inserted into the third groove.
delete delete The method of claim 1,
The bearings in the longitudinal direction of the drill axis are respectively disposed on both sides of the O-ring cabinet,
A dust collecting device located between the O-ring cabinet and the cover part in a longitudinal direction of the drill shaft. delete The method of claim 1,
The cover part further includes a cap part for opening and closing the suction hole,
Dust collecting device to which the suction device is connected to the suction hole. The method of claim 1,
The cover part
The dust collecting device is disposed on the other side of the second body, and further comprising an adhesive part having a ductility. delete A handle part installed on a drill axis; And a cover part connected to an end of the handle part.
The handle portion may include a first body including a through hole through which the drill shaft passes; A first connecting part formed at an end of the main body and connected to the cover part; And a bearing part disposed between the first body and the drill shaft.
The cover part has a second connecting part (Second Connecting Part) for connecting to the first body on one side, the other side (Open) Second body (Second Body Part); And an inhalation part formed on a side wall of the second body and including an inhalation hole.
The second body may include a first sub body part; And a first sub body part connected to the first sub body.
The first sub body is located between the second sub body and the handle portion,
The suction hole is formed in the first sub body,
The length of the first sub body in the longitudinal direction of the drill axis is shorter than the length of the second sub body,
The handle portion further includes a bent portion formed on the outer surface of the first body (Outer Surface),
And a resilient portion disposed between the first sub body and the second sub body. delete

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