U.S. patent application number 13/824848 was filed with the patent office on 2013-09-12 for drilling apparatus having head.
The applicant listed for this patent is Suk Shin In. Invention is credited to Suk Shin In.
Application Number | 20130233624 13/824848 |
Document ID | / |
Family ID | 46136600 |
Filed Date | 2013-09-12 |
United States Patent
Application |
20130233624 |
Kind Code |
A1 |
In; Suk Shin |
September 12, 2013 |
DRILLING APPARATUS HAVING HEAD
Abstract
Disclosed is a drilling apparatus having a head. The drilling
apparatus includes a main body, a lead supported by the main body
of the drilling apparatus, a driving shaft slidably installed in
the lead and having a unit rod connected thereto for performing a
drilling work, and a head having an actuator for driving the
driving shaft, wherein the driving shaft includes a screw coupling
part formed on the outer circumferential surface of the driving
shaft and screw-coupled with an end of the unit rod for performing
the drilling work, and a screw coupling inducing part formed at a
front end of the screw coupling part to induce screw coupling
between the driving shaft and a rod screw coupling part formed at a
hollow part formed at the end of the unit rod. The drilling
apparatus can reduce the number of work numbers by combining the
unit rod with the driving shaft, thereby increasing the efficiency
of the drilling work.
Inventors: |
In; Suk Shin; (Gwangju,
KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
In; Suk Shin |
Gwangju |
|
KR |
|
|
Family ID: |
46136600 |
Appl. No.: |
13/824848 |
Filed: |
September 30, 2011 |
PCT Filed: |
September 30, 2011 |
PCT NO: |
PCT/KR2011/007283 |
371 Date: |
May 28, 2013 |
Current U.S.
Class: |
175/170 |
Current CPC
Class: |
E21B 17/03 20130101;
E21B 7/02 20130101 |
Class at
Publication: |
175/170 |
International
Class: |
E21B 7/02 20060101
E21B007/02 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 30, 2010 |
KR |
10-2010-0095223 |
May 13, 2011 |
KR |
10-2011-0045376 |
Claims
1. A drilling apparatus having a head, comprising: a main body; a
lead supported by the main body of the drilling apparatus; a
driving shaft slidably installed in the lead and having a unit rod
connected thereto for performing a drilling work; and a head having
an actuator for driving the driving shaft, wherein the driving
shaft includes a screw coupling part formed on the outer
circumferential surface of the driving shaft and screw-coupled with
an end of the unit rod for performing the drilling work, and a
screw coupling inducing part formed at a front end of the screw
coupling part to induce screw coupling between the driving shaft
and a rod screw coupling part formed at a hollow part formed at the
end of the unit rod.
2. The drilling apparatus of claim 1, wherein a stopper is provided
on the outer circumferential surface of a top end of the screw
coupling part of the driving shaft for preventing the unit rod
screw-coupled to the driving shaft from elevating.
3. The drilling apparatus of claim 1, wherein the screw coupling
induction part includes a taper part extending from the screw
coupling part of the driving shaft to an end of the screw coupling
induction part and having diameters gradually decreasing.
4. A drilling apparatus having a head, comprising: a main body; a
lead supported by the main body of the drilling apparatus; a
driving shaft slidably installed in the lead and having a unit rod
connected thereto for performing a drilling work; and a head having
an actuator for driving the driving shaft, wherein the driving
shaft includes a first driving shaft supported on the head body by
a bearing and exposed to a bottom end of the head body, and a
second driving shaft having a screw coupling part screw-coupled
coaxially with the first driving shaft and screw-coupled with an
end of the unit rod for performing the drilling work, and a screw
coupling inducing part formed at a front end of the screw coupling
part to induce screw coupling between the driving shaft and a rod
screw coupling part formed at a hollow part formed at the end of
the unit rod.
5. The drilling apparatus of claim 4, wherein the first driving
shaft includes stepped coupling parts having different diameters,
and a plurality of second driving shafts having different diameters
to be selectively coupled to the coupling parts of the first
driving shaft.
Description
TECHNICAL FIELD
[0001] The present invention relates to a drilling apparatus, and
more particularly, to a drilling apparatus having a head, which
facilitates engagement or disengagement between a rod and a driving
shaft installed in the head when a drilling work is performed using
a bit.
BACKGROUND ART
[0002] In general, a drilling apparatus is used to excavate deep
holes into the ground for purposes of boring, soil testing or
development of underground water. The drilling apparatus is
classified into a type in which a boring work is performed while
rotating a rod having a bit, and a type in which a boring work is
performed by rotating a rod having a bit or a cutter and striking
the bit or the cutter using the rod.
[0003] A conventional drilling apparatus is disclosed in Korean
Patent No. 624233. The disclosed drilling apparatus comprises a
main body having a driving device such as an engine, a leader
supported by the main body, and a head sliding along the leader and
generating an elevational force or a rotational force by a driving
device provided in the main body, a rod coupled to the head and
elevating or rotating by the head, and a drill unit provided at a
front end of the rod and perforate the ground while elevating or
rotating along with the rod.
[0004] The drill unit includes a bit striking and drilling the
ground and a hammer operated by a hydraulic pressure to apply a
striking force to the beat. The drilling apparatus is configured to
drill the ground to a predetermined depth such that the bit of the
drill unit rotates or strikes the ground.
[0005] As the excavated depth increases in the course of drilling,
the drilling work is performed by connecting unit rods to allow a
drill unit to excavate the ground deeper and deeper. The unit rods
are connected such that a driving shaft of a head is separated from
the unit rod currently performing the drilling work and then
connected to a new unit rod to perform a drilling work.
[0006] In the course of drilling, if the unit rods have relatively
small diameters, it is difficult to align the driving shaft of the
head with the unit rod. In particular, even if the unit rod and the
driving shaft are coaxially aligned, it is not easy to screw-couple
the unit rod to the driving shaft. Thus, it is impossible to
increase the efficiency of the drilling work due to a trouble in
screw-coupling of the unit rod and the driving shaft.
[0007] Meanwhile, a support pipe is installed to prevent a
landslide during the drilling work. As the drill unit and the unit
rod are inserted into the ground to a gradually increasing depth,
it is necessary to connect the support pipe. Since there is no
separate means for balancing the support pipe, the support pipe may
vibrate or may not be aligned with the center of a rotation shaft.
Therefore, it is necessary to adjust the support pipe installed on
the ground when the support pipe is connected.
DISCLOSURE OF THE INVENTION
[0008] In order to overcome the above-mentioned shortcomings, the
present invention provides a drilling apparatus having a head,
which facilitates engagement or disengagement between a rod and a
driving shaft of the head when a drilling work is performed,
thereby increasing the efficiency in the drilling work.
[0009] The present invention also provides a drilling apparatus
having a head, which enables engagement between a driving shaft and
a unit rod according to the diameter of the unit rod connected to
the driving shaft.
[0010] According to an aspect of the invention, there is provided a
drilling apparatus having a head, including a main body, a lead
supported by the main body of the drilling apparatus, a driving
shaft slidably installed in the lead and having a unit rod
connected thereto for performing drilling work, and a head having
an actuator for driving the driving shaft, wherein the driving
shaft includes a screw coupling part formed on the outer
circumferential surface of the driving shaft and screw-coupled with
an end of the unit rod for performing the drilling work, and a
screw coupling inducing part formed at a front end of the screw
coupling part to induce screw coupling between the driving shaft
and a rod screw coupling part formed at a hollow part formed at the
end of the unit rod.
[0011] A stopper may be provided on the outer circumferential
surface of a top end of the screw coupling part of the driving
shaft for preventing the unit rod screw-coupled to the driving
shaft from elevating.
[0012] The screw coupling induction part may include a taper part
extending from the screw coupling part of the driving shaft to an
end of the screw coupling induction part and having diameters
gradually decreasing.
[0013] According to another aspect of the invention, there is
provided a drilling apparatus having a head, including a main body,
a lead supported by the main body of the drilling apparatus, a
driving shaft slidably installed in the lead and having a unit rod
connected thereto for performing drilling work, and a head having
an actuator for driving the driving shaft, wherein the driving
shaft includes a first driving shaft supported on the head body by
a bearing and exposed to a bottom end of the head body, and a
second driving shaft having a screw coupling part screw-coupled
coaxially with the first driving shaft and screw-coupled with an
end of the unit rod for performing the drilling work, and a screw
coupling inducing part formed at a front end of the screw coupling
part to induce screw coupling between the driving shaft and a rod
screw coupling part formed at a hollow part formed at the end of
the unit rod.
[0014] The first driving shaft may include stepped coupling parts
having different diameters, and a plurality of second driving
shafts having different diameters to be selectively coupled to the
coupling parts of the first driving shaft.
[0015] As described above, in the drilling apparatus having a head
according to the present invention, the unit rod and the driving
shaft can be easily engaged with each other during a drilling work,
thereby increasing the efficiency of the drilling work.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The objects, features and advantages of the present
invention will be more apparent from the following detailed
description in conjunction with the accompanying drawings, in
which:
[0017] FIG. 1 is a side view of a drilling apparatus having a head
according to the present invention;
[0018] FIG. 2 is a cross-sectional view of the drilling apparatus
shown in FIG. 1;
[0019] FIG. 3 is an exploded perspective view of a driving shaft
according to an embodiment of the present invention;
[0020] FIGS. 4 and 5 are perspective views of driving shafts
according to another embodiment of the present invention; and
[0021] FIG. 6 is a perspective view illustrating a state in which a
driving shaft and a unit rod are engaged with each other.
BEST MODE FOR CARRYING OUT THE INVENTION
[0022] Hereinafter, embodiments of the present invention will be
described in detail with reference to the accompanying
drawings.
[0023] The drilling apparatus according to the present invention
facilitates engagement between a unit rod and a driving shaft of
the head when the ground hole is excavated, and en exemplary
embodiment of the drilling apparatus is shown in FIGS. 1 to 5.
[0024] Referring to FIGS. 1 to 5, the drilling apparatus 100 having
a head includes a lead 20 supported by a main body 10, a driving
shaft 40 slidably installed in the lead 20 and connected to the
topmost unit rod among the unit rods 70 connected to each other for
drilling work, a head 30 having an actuator (not shown) for driving
the driving shaft 40, and a support pipe 200 installed on the
ground for preventing earth and sand around a hole excavated by the
lead from collapsing.
[0025] The head 30 slidably installed along the lead 20 and is
configured to elevate by a separate driver (although not shown, the
driver including sprockets installed at top and bottom portions of
the lead 20, a chain locked on the sprockets and having one side
fixed to the head 30, and a hydraulic motor driving one of the
sprockets). As shown in FIG. 2, a hydraulic motor 33 for driving
the driving shaft 40 rotatably supported by the bearing 32 is
installed in a main body 31 of the head 30. The hydraulic motor 33
receives hydraulic oil by a hydraulic supply system installed in
the main body 10 to then be driven.
[0026] As shown in FIGS. 2 and 3, the driving shaft 40 includes a
screw coupling part 41 and a screw coupling inducing part 42. The
screw coupling part 41 is formed on the outer circumferential
surface of the driving shaft 40 and is screw-coupled to an end of
the unit rod 70 for performing a drilling work. The screw coupling
inducing part 42 is formed at a front end of the screw coupling
part 41 to smoothly achieve screw coupling between the driving
shaft 40 and a rod screw coupling part 73 formed at a hollow part
70a at the end of the unit rod 70. A stopper 43 is formed on the
outer circumferential surface of the driving shaft 40 at a top end
of the driving shaft 40, corresponding to a terminating end of the
screw coupling part 41, to prevent the unit rod 70 screw-coupled to
the screw coupling part 41 from being damaged while rotating.
[0027] The stopper 43 may include a protrusion formed on the outer
circumferential surface of the driving shaft 40, but aspects of the
present invention are not limited thereto.
[0028] The hollow part 40a is formed at the driving shaft 40 in a
lengthwise direction. The screw coupling inducing part 42 may be
tapered upwardly from its end. That is to say, a diameter of an end
of the screw coupling induction part 42 is smaller than that of the
driving shaft 40. Smooth surfaces 45 and 46 symmetrical about the
center of the driving shaft 40 are provided at one or more sides of
the screw coupling part 41 or the screw coupling inducing part 42.
When the driving shaft 40 includes first and second driving shafts
to be described later, the smooth surfaces 45 and 46 are provided
for engagement or disengagement of the first driving shaft and the
second driving shaft.
[0029] FIG. 4 illustrates a head driving shaft of a drilling
apparatus according to another embodiment of the present
invention.
[0030] Referring to FIG. 4, a head driving shaft 50 is supported on
the head body 31 by a bearing 32 to be rotatably installed, and
includes a first driving shaft 51 formed at an end exposed to a
bottom end of the head body 31 and a second driving shaft 55
combined with the first driving shaft 51.
[0031] The first driving shaft 51 may include stepped coupling
parts 51a, 51b and 51c having different diameters. Screws for being
coupled to the second driving shaft 55 are formed on the outer
circumferential surfaces of the coupling parts 51a, 51b and
51c.
[0032] The second driving shaft 55 may include a plurality of
second driving shafts having different diameters (corresponding to
diameters of unit rods) to be engaged with the coupling parts 51a,
51b and 51c of the first driving shaft 51. The second driving
shafts 55 having different diameters are provided for the purpose
of being compatibly used when the unit rods for performing a
drilling work have different diameters.
[0033] The second driving shaft 55 may include a coupling screw
part 56, a screw coupling part 57 and a screw coupling inducing
part 58. The coupling screw part 56 is formed on the inner
circumferential surface of the second driving shaft 55 to be
coaxially coupled to the first driving shaft 51, the screw coupling
part 57 is formed on the outer circumferential surface of the
second driving shaft 55 to be screw-coupled to the rod screw
coupling part 73 of the unit rod 70, and the screw coupling
inducing part 58 extends from the screw coupling part 57. As
described above, the screw coupling inducing part 58 is tapered
such that its diameter gradually decreases from the screw coupling
part 57 to its end. The end of the screw coupling induction part 58
may be spherical to facilitate insertion of the hollow part 70a of
the unit rod 70 into the screw coupling induction part 58. A hollow
part 40a is formed in a lengthwise direction of the first and
second driving shafts 51 and 55.
[0034] As shown in FIG. 5, the first and second driving shafts 51
and 55 may be coupled to the first and second driving shafts 51 and
55 by flange parts 61 and 62.
[0035] A stopper 59 may be installed in the second driving shaft 55
to prevent the unit rod 70 coupled to the second driving shaft 55
and performing a drilling work from elevating while rotating. A
position adjusting unit (not shown) may further be provided at an
upper portion of the stopper 59 to hold the support pipe 200
inserted into an excavated portion for preventing earth and sand
existing around the excavated portion from collapsing. The position
adjusting unit is tapered such that its upper side has a larger
diameter than the support pipe 200.
[0036] The aforementioned drilling apparatus operates as
follows.
[0037] As shown in FIGS. 1 and 6, in order to excavate an
underground hole using the drilling apparatus according to the
present invention, the drilling apparatus is positioned at a
portion where the ground hole is to be formed, and the lead 20 is
vertically positioned on the portion where the ground hole is to be
formed. In such a state, the head 30 is positioned on the lead 20
and the unit rod 70 is then connected to the driving shaft 40. An
air hammer or a water hammer 80 for performing a drilling work is
installed at a bottom end of the unit rod 70.
[0038] The unit rod 70 and the driving shaft 40 are engaged with
each other such that the unit rod 70 is suspended using a crane
(not shown), the screw coupling induction part 42 of the driving
shaft 40 is inserted into the hollow part 70a of the unit rod 70,
and the driving shaft 40 is rotated while moving the unit rod 70
and the driving shaft 40 with respect to each other. In such a
manner, in a state in which the screw coupling induction part 42
extending from the screw coupling part 41 of the driving shaft 40
is inserted into the hollow part 70a of the unit rod 70, the screw
coupling part 41 is guided to the rod screw coupling part 73 of the
unit rod 70, thereby facilitating engagement of the unit rod 70 and
the driving shaft 40, which will now be described in more detail.
Since the screw coupling induction part 42 provided at the driving
shaft 40 has a diameter gradually decreasing from the screw
coupling part 41, even if the unit rod 70 and the driving shaft 40
are not aligned in line, the screw coupling induction part 42 can
be easily inserted into the hollow part 70a of the unit rod 70.
[0039] Therefore, the problem associated with the conventional
drilling apparatus, that is, the necessity for making the end of
the unit rod 70 and the driving shaft 40 coincide with each other
by an operator's manual work, can be solved. In particular, when
the unit rod 70 has a small diameter and a small thickness,
engagement of the unit rod 70 and the driving shaft 40 can be
smoothly achieved by being guided by the screw coupling induction
part 42.
[0040] The above-described operation is achieved in the same manner
as in engagement of the second driving shafts 55 and the unit rod
70. In particular, as shown in FIG. 4, the coupling parts 51a, 51b
and 51c formed in multiple-steps are provided in the first driving
shaft 51, and the second driving shafts 55 suited to diameters of
the respective coupling parts 51a, 51b and 51c are provided,
thereby allowing the second driving shafts 55 to be compatibly used
according to the diameters of the unit rods for performing a
drilling work.
[0041] Meanwhile, the stopper 43 for preventing the unit rod 70
from elevating due to a rotational force of the driving shaft 40
when the unit rod 70 is screw-coupled is provided at the driving
shaft 40. Thus, even if a rotational load is applied to the unit
rod 70 during a drilling work, it is possible to prevent the unit
rod 70 from elevating along the screw coupling part 41 of the
driving shaft 40. It is also possible to prevent the unit rod 70
screw-coupled to the screw coupling part 41 from being damaged due
to the rotational load applied thereto while rotating. That is to
say, the unit rod 70 can be prevented from being damaged, which may
be caused when the unit rod 70 elevates to a portion of the driving
shaft 40 without screws due to the rotational load.
[0042] In addition, the position adjusting unit for balancing the
support pipe 200 installed for drilling soft ground is further
provided at the driving shaft 40. When the head 30 is lowered, the
position adjusting unit is inserted into the support pipe 200,
thereby aligning centers of the support pipe 200 and the driving
shaft 40. Therefore, it is possible to prevent the center of the
support pipe 2000 from deviating from the center of the unit rod 70
while the drilling work is performed.
[0043] Although exemplary embodiments of the present invention have
been described in detail hereinabove, it should be understood that
many variations and modifications of the basic inventive concept
herein described, which may appear to those skilled in the art,
will still fall within the spirit and scope of the exemplary
embodiments of the present invention as defined by the appended
claims.
* * * * *