U.S. patent application number 13/641575 was filed with the patent office on 2013-02-07 for vibration nipper for heavy machinery.
The applicant listed for this patent is Jae-Ryong Jo, Jung Ho Lee. Invention is credited to Jae-Ryong Jo, Jung Ho Lee.
Application Number | 20130031812 13/641575 |
Document ID | / |
Family ID | 44834627 |
Filed Date | 2013-02-07 |
United States Patent
Application |
20130031812 |
Kind Code |
A1 |
Jo; Jae-Ryong ; et
al. |
February 7, 2013 |
VIBRATION NIPPER FOR HEAVY MACHINERY
Abstract
There is provided a vibrating nipper including a vibrating body
in which a plurality of gears built therein and having eccentric
pendulums are longitudinally arranged and rotated to generate
longitudinal vibration, the vibrating body in which the gears
rotated by an oil hydrolytic motor are longitudinally arranged to
be rotatable, an eccentric pendulum mounted on each of the gears to
generate the longitudinal vibration while rotating the gears,
wherein a nipper blade is longitudinally mounted on a bottom of the
vibrating body in such a way that the vibrating body is capable of
being inserted deeply into the ground along the nipper blade when
excavating the ground.
Inventors: |
Jo; Jae-Ryong; (Seoul,
KR) ; Lee; Jung Ho; (Gyeonggi-do, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Jo; Jae-Ryong
Lee; Jung Ho |
Seoul
Gyeonggi-do |
|
KR
KR |
|
|
Family ID: |
44834627 |
Appl. No.: |
13/641575 |
Filed: |
April 19, 2011 |
PCT Filed: |
April 19, 2011 |
PCT NO: |
PCT/KR11/02796 |
371 Date: |
October 16, 2012 |
Current U.S.
Class: |
37/403 ;
299/37.1 |
Current CPC
Class: |
E02F 5/326 20130101 |
Class at
Publication: |
37/403 ;
299/37.1 |
International
Class: |
E02F 5/30 20060101
E02F005/30; E02F 3/04 20060101 E02F003/04 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 20, 2010 |
KR |
10-2010-0036183 |
Claims
1-3. (canceled)
4. A vibrating nipper mountable on an arm of heavy equipment, the
vibrating nipper comprising: a vibrating body comprising a
plurality of gears rotated by an oil hydrolytic motor, wherein the
plurality of gears are longitudinally arranged to be rotatable, an
eccentric pendulum mounted on each of the plurality of gears to
generate longitudinal vibration while rotating the gears, and a
nipper blade which is longitudinally mounted on a bottom of the
vibrating body in such a way that the vibrating body is capable of
being inserted into ground along the nipper blade.
5. The vibrating nipper of claim 4, wherein the vibrating body
comprises three gears.
6. The vibrating nipper of claim 5, wherein the vibrating body has
a configuration in which the size of a rotation moment of an
eccentric pendulum of a central gear is an half of the size of a
rotation moment of eccentric pendulums connected to top and bottom
gears in such a way that, when rotating the gears, later
centrifugal force generated from the eccentric pendulums of the top
and bottom gears has the same size in a different direction as that
of the eccentric pendulum of the central gear to mutually
compensating one another and mutual centrifugal forces thereof are
overlapped, thereby generating vibration.
7. The vibrating nipper of claim 4, wherein the vibrating body has
a configuration in which top and bottom corners of the vibrating
body are connected to a frame surrounding the vibrating body via
links and pins in the shape of a double lever link device.
8. The vibrating nipper of claim 7, wherein the configuration
allows levers of top and bottom links to trace arcs and to allow
top and bottom displacement to be possible.
9. The vibrating nipper of claim 4, wherein the heavy equipment is
an excavator, a bulldozer, or a wheel loader.
Description
FIELD
[0001] The present invention relates to a vibrating nipper for
heavy equipment, mounted on heavy equipment such as excavators,
bulldozers, and wheel loaders, capable of effectively crushing and
excavating in the fields of civil engineering and demolishing, and
more particularly, to a vibrating nipper with improved durability
including a vibrating body in which a plurality of gears having
eccentric pendulums are longitudinally arranged and rotated and
generate longitudinal vibration in such a way that the width of the
vibrating body may be manufactured to be narrow to deeply insert a
nipper blade into the ground, a frame is connected to the vibrating
body in a link structure to freely operate the nipper blade, and
built-in buffers are protected.
BACKGROUND
[0002] Generally, in the field of construction, to crush bedrock, a
breaker formed of an iron pin is mounted on an arm of heavy
equipment and strikes the bedrock to be crushed.
[0003] However, general methods of striking using a breaker cause
great noises, it is needed heavy equipment with low noise and high
efficiency.
[0004] Also, though bedrocks should be crushed using breakers in
case of a land formed of only bedrocks, since breakers make holes
in bedrocks instead of crushing the same when bedrocks are soft,
there is needed an apparatus having an excavating blade in the
shape capable of excavating the ground as an excavator and also,
crushing and excavating the ground while longitudinally vibrating
as breakers.
[0005] For this, the Applicant of the present invention has filed
"Vibrator nipper for heavy equipment" of Korean Patent No.
10-0755017, "Vibrating nipper" of Korean Patent Application
Publication No. 10-2009-0054513, and "Vibrating nipper" of Korean
Patent No. 10-0878296, providing technologies of effectively
crushing and demolishing with low noise.
[0006] FIGS. 1 and 2 illustrate a general vibrating nipper 1. The
vibrating nipper 1 has a configuration in which a vibrating body 20
is arranged inside a guide bracket 10 on whose top a mount part 12
is formed, the vibrating inside which a vibrator with two axes is
formed including a configuration in which a gear 23 of a driving
axis 22 on which an eccentric weight 21 operated by an oil
hydrolytic motor (not shown) is installed is laterally interlocked
with a gear 23' of a driven axis 22' on which an eccentric weight
21' is installed.
[0007] Also, both outsides of the vibrating body 20 are coupled
with each other using dustproof rubbers 31, 31', 32, and 32' and
guide bearings 41 and 42 are installed on top and bottom between
the inside of the guide bracket 10 and the outside of the vibrating
body 20, where the dustproof rubbers 31, 31', 32, and 32' mounted
on, in such a way that outer circumferential surfaces of the guide
bearings 41 and 42 are separated from an outer surface of the
vibrating body 20 with a certain interval. Also, a nipper blade 50
is installed on a bottom of the vibrating body 20 by using an
interlocking bolt.
[0008] In case of the vibrating nipper 1, as shown in FIG. 2, the
gears 23 and 23' rotated by the oil hydrolytic motor inside the
vibrating body 20 are laterally interlocked and horizontally
arranged in such a way that a width W of the vibrating body 20
becomes relatively wider, which prevents the vibrating body 20 with
such wide width W from being inserted into the ground though the
nipper blade 50 is inserted into the ground. Accordingly, such
configuration in which the gears 23 and 23' are laterally arranged
inside the vibrating body 20 has a problem while deeply excavating
the ground.
[0009] Also, when the nipper blade 50 excavates the ground, the
vibrating nipper 1 receives excavation-resistance of from the
ground in a direction opposite to that of the move of the nipper
blade 50, that is, in a direction of A in FIG. 1. To support the
force of excavation-resistance, though there are added to the
vibrating nipper 1 a plurality of friction supporting structures 41
and 42 or there are installed a plurality of strengthened dustproof
rubbers, it is difficult to support the excavation-resistance,
thereby easily tearing the dustproof rubbers 31, 31', 32, and 32'
due to excessive lateral deformation or deterioration of buffer
capacity of the dustproof rubbers 31, 31', 32, and 32' to disturb
longitudinal vibration.
[0010] Accordingly, when increasing excavation force, the vibrating
nipper 1 may be easily damaged and durability thereof is decreased
to spend a lot of time to mend or maintain the same.
SUMMARY
[0011] To solve the problems described above, an aspect of the
present invention provides a vibrating nipper for heavy equipment,
the vibrating nipper having a configuration in which built-in gears
and eccentric pendulums longitudinally vibrate due to reaction
force of an oil hydrolytic motor regardless of a vibrating body
manufactured to have a narrower width and the vibrating body is
capable of being deeply inserted into the ground along a nipper
blade when excavating the ground, thereby improving excavation
performance.
[0012] An aspect of the present invention also provides a vibrating
nipper for heavy equipment, the vibrating nipper having a
configuration in which, when a nipper blade receives lateral
resistance force from the ground while excavating the ground, since
the nipper blade and a vibrating body are connected to each other
to form a longitudinally displaceable link structure, the lateral
resistance force to the nipper blade is greatly buffered to allow
the nipper blade to freely operate and buffers supporting the
vibrating body are protected, thereby greatly improving durability
thereof.
[0013] According to an aspect of the present invention, there is
provided a vibrating nipper mounted on an arm of heavy equipment
such as an excavator, a bulldozer, and a wheel loader to
simultaneously crush and excavate in the field of civil engineering
and demolishing, the vibrating nipper including a vibrating body in
which gears rotated by an oil hydrolytic motor are longitudinally
arranged to be rotatable, an eccentric pendulum mounted on each of
the gears to generate longitudinal vibration while rotating the
gears, wherein a nipper blade is longitudinally mounted on a bottom
of the vibrating body in such a way that the vibrating body is
capable of being inserted deeply into the ground along the nipper
blade when excavating the ground.
[0014] The vibrating body may have a configuration in which the
three gears are longitudinally arranged and the size of a rotation
moment of an eccentric pendulum of a central gear is a double of
the size of rotation moments of eccentric pendulums connected to
top and bottom gears in such a way that, when rotating the gears,
later centrifugal forces generated from the eccentric pendulums of
the top and bottom gears have the same size in a different
direction as that of the eccentric pendulum of the central gear to
mutually compensate one another and mutual centrifugal forces
thereof are overlapped, thereby generating vibration.
[0015] The top gear is connected to the oil hydrolytic motor and
operates as a driving gear, the central gear rotates in a direction
opposite to that of the top gear, and the bottom gear rotates in a
direction opposite to that of the central gear. Accordingly, when
the eccentric pendulums of the top and bottom gears are laterally
located, the eccentric pendulum of the central gear is laterally
arranged opposite thereto, thereby compensating mutual centrifugal
forces. When the eccentric pendulums of the top and bottom gears
are longitudinally located, the eccentric pendulum of the central
gear is longitudinally arranged in the same direction as that of
the eccentric pendulums of the top and bottom gears, thereby
overlapping centrifugal forces and generating longitudinal
vibration.
[0016] The vibrating body may have a configuration in which front
top and bottom corners thereof are connected to a frame surrounding
the vibrating body using links and pins in the shape of a double
lever link device and to allow levers of top and bottom links to
trace arcs and to allow top and bottom displacement to be
possible.
[0017] A front corner and a rear corner of the vibrating body are
supported by a plurality of buffers built in the frame,
respectively. The buffers are formed of dustproof rubbers mounted
on both side plates formed of iron, respectively to buffer
vibration.
[0018] According to the present invention, there is provided a
vibrating nipper having a configuration in which a vibrating body
is manufactured to have the width relatively narrower than general
ones by longitudinally arranging gears inside the vibrating body,
on each of which an eccentric pendulum is mounted to generate
longitudinal vibration while rotating the gears. Accordingly, it is
possible to form a frame with a narrow breadth simultaneously with
a structure strong enough not to be an obstacle while excavating,
thereby deeply inserting a nipper blade into the ground to increase
the depth of excavation and greatly improving excavation
performance. Also, since front top and bottom corners of the
vibrating body are connected to the frame surrounding the vibrating
body by using links and pins to longitudinally trace arcs and to be
displaceable, though the nipper blade receives lateral
excavation-resistance force from the ground while excavating the
ground, it is possible to sufficiently support the lateral
excavation-resistance force to the nipper blade to strongly
excavate the ground and the nipper blade freely perform
longitudinal operation to protect buffers supporting the vibrating
body not to be damaged, and durability thereof is greatly improved
due to a longitudinally displaceable link structure of connecting
the nipper blade and the vibrating body to the frame.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The above and/or other aspects and advantages of the present
invention will become apparent and more readily appreciated from
the following detailed description, taken in conjunction with the
accompanying drawings of which:
[0020] FIG. 1 is a perspective view illustrating a general
vibrating nipper;
[0021] FIG. 2 is a diagram illustrating the process of operating a
plurality of gears and eccentric pendulums laterally mounted on the
vibrating nipper of FIG. 1;
[0022] FIG. 3 is a perspective view illustrating a vibrating nipper
for heavy equipment according to an embodiment of the present
invention;
[0023] FIG. 4 is a side view illustrating the vibrating nipper of
FIG. 3;
[0024] FIG. 5 is a longitudinal cross-section of the vibrating
nipper of FIG. 3;
[0025] FIG. 6 is a side cross-section of a configuration in which
three gears and eccentric pendulums mounted on the vibrating nipper
of FIG. 3 are longitudinally arranged;
[0026] FIG. 7 is an exploded perspective view illustrating a
configuration in which a front corner of a body of the vibrating
nipper of FIG. 3 is mounted on a frame using pins and links to be
longitudinally displaceable;
[0027] FIG. 8 is a diagram illustrating a path of the pins and the
links, shown in FIG. 7, connecting the body to the frame of the
vibrating nipper of FIG. 3;
[0028] FIG. 9 is a perspective view illustrating buffers provided
in the vibrating nipper of FIG. 3;
[0029] FIG. 10 is a cross-sectional view illustrating a
configuration in which the buffers provided in the vibrating nipper
of FIG. 3 are installed inside the top and bottom of the frame;
and
[0030] FIGS. 11 to 14 are diagrams illustrating by stages a
situation in which the gears and the eccentric pendulums mounted on
the vibrating nipper of FIG. 3 are vibrated longitudinally due to
overlapped centrifugal forces and not vibrated laterally due to
mutual compensation between the centrifugal forces.
DETAILED DESCRIPTION
[0031] Hereinafter, an exemplary embodiment of the present
invention will now be described in detail. Like reference numerals
refer to the like elements throughout.
[0032] A vibrating nipper 100 according to an embodiment of the
present invention is mounted on an arm of heavy equipment such as
an excavator, a bulldozer, and a wheel loader to simultaneously
perform crushing and excavating in the fields of civil engineering
and demolishing.
[0033] As entirely shown in FIG. 3, the vibrating nipper 100 has a
configuration in which a mount 110 with arm fastening holes 112
connected to an arm of the heavy equipment formed thereon is formed
on a top thereof, a frame 120 is connected to a bottom of the mount
110 in an approximate .andgate. shape, a vibrating body 130 is
located inside the frame 120, and a nipper blade 135 is mounted on
a bottom of the vibrating body 130.
[0034] As shown in FIGS. 4, 5, and 6, the vibrating body 130 has a
configuration in which gears 142a, 142b, and 142c rotated by an oil
hydrolytic motor 140 are longitudinally arranged to be rotatable
and eccentric pendulums 144a, 144b, and 144c are mounted on one
sides of the respective gears 142a, 142b, and 142c to generate a
longitudinal vibration while rotating the gears 142a, 142b, and
142c.
[0035] That is, the vibrating body 130 has a configuration in which
the three gears 142a, 142b, and 142c are longitudinally arranged
and coupled with one another. Via the configuration, as shown in
FIG. 4, a width w1 of the vibrating body 130 may be formed to be
relatively smaller than the general width W.
[0036] As described above, on the bottom of the vibrating body 130,
there is mounted the nipper blade 135 longitudinal to the vibrating
body 130 and a width w2 of the frame 120 may be increased due to
the small width w1 of the vibrating body 130. Accordingly, since it
is possible to form a frame having a structure strong enough in a
shape whose breadth b is narrow not to be an obstacle while
excavating the ground, the vibrating body 130 is deeply inserted
into the ground along the nipper blade 135, thereby improving
excavation performance.
[0037] On the other hand, the three gears 142a, 142b, and 142c
built in the vibrating body 130 are formed in such a way that the
eccentric pendulums 144a and 144c connected to the top and bottom
gears 142a and 142c have a rotation moment whose size is double as
that of a rotation moment of the eccentric pendulum 144b of the
central gear 142b.
[0038] In other words, when rotating the gears 142a, 142b, and
142c, there are generated centrifugal forces in the three gears
142a, 142b, and 142c by the rotation moments of the respective
eccentric pendulums 144a, 144b, and 144c. In this case, lateral
centrifugal forces generated from the eccentric pendulums 144a and
144c of the top and bottom gears 142a and 142c and lateral
centrifugal force generated from the eccentric pendulum of the
central gear 142b are formed in the same size in mutually different
directions, thereby being mutually compensated and mutually
overlapping in a longitudinal direction to generate vibration.
[0039] As shown in FIG. 5, the top gear 142a is connected to the
oil hydrolytic motor 140 and operate as a driving gear, the central
gear 142b interlocked with a bottom of the top gear 142a rotates in
a direction opposite to that of the top gear 142a, and the bottom
gear interlocked with a bottom of the central gear 142b rotates in
a direction opposite to that of the central gear 142b.
[0040] Via such configuration, the eccentric pendulums 144a and
144c of the top and bottom gears 142a and 142c rotate in the same
direction and the eccentric pendulum 144b of the central gear 142b
rotates in the direction opposite thereto.
[0041] As shown in HG. 7, the vibrating nipper 100 has a
configuration in which a front bottom corner 132a of the vibrating
body 130 is connected to the frame 120 surrounding the vibration
body 130 via a link 162a and pins 164a and 164b and a front top
corner 132b of the vibrating body 130 is connected to the frame 120
via a link 162b and pins 164c and 164d in the shape of a
double-lever link device.
[0042] Accordingly, when excavating the ground using the nipper
blade 135, strong lateral excavation-resistance force is applied to
the nipper blade 135 from the ground, in which the lateral
excavation-resistance force is supported via the links 162a and
162b connected to the vibrating body 130. When the vibrating body
130 vibrates due to vibration force of the pendulums, the vibrating
body 130 longitudinally traces arcs and is displaced due to
lever-operation of the links 162a and 162b.
[0043] That is, in the case of the vibrating body 130, the front
bottom corner 132a is connected to one side of the link 162a using
the pin 164a and another side of the link 162a is connected to the
frame surrounding the vibrating body 130 using the pin 164b and the
front top corner 132b is connected to one side of the link 162b
using the pin 164c and another side of the link 162b is connected
to the frame 120 using the pin 164d in such a way that the
vibrating body 130, the frame 120, and the links 162a and 162b form
the double-lever link device. When the nipper blade 135 receives
the lateral excavation-resistance force from the ground while
excavating the ground, as shown in FIG. 8, the vibrating body 130
may move tracing arcs longitudinally to the frame 120 using the
links 162a and 162b and the pins 164a, 164b, 164c, and 164d,
thereby supporting the action of the force in a lateral direction A
and longitudinally vibrating.
[0044] As shown in FIG. 4, a front corner 138a and a rear corner
138b of the vibrating body 130 are supported by a plurality of
buffers 170 built in the frame. The buffers 170 has a configuration
in which a dustproof rubber 174 is mounted between both side plates
172a and 172b formed of steel, as shown in FIG. 9.
[0045] The buffers 170 are longitudinally arranged forming a
plurality of pairs, respectively, inside the frame 120, thereby
effectively buffering vibration generated by the vibrating body
130.
[0046] The vibrating nipper 100 formed as described above operates
in such a way that the vibrating body 130 mounted inside the frame
120 longitudinally vibrates while suppressing lateral or right and
left vibration.
[0047] That is, as shown in FIG. 11, before the vibrating body 130
operates, the eccentric pendulums 144a and 144c connected to the
top and bottom gears 142a and 142c and the eccentric pendulum 144b
formed on the central gear 142b are arranged downward due to dead
loads thereof.
[0048] In such status, when the oil hydrolytic motor 140 operates,
as shown in FIG. 12, the top gear 142a rotates clockwise, the
eccentric pendulum 144a rotates in the same direction, the central
gear 142b interlocked with the top gear 142a rotates in the
opposite direction thereof, and the eccentric pendulum 144b rotates
in a direction opposite to that of the eccentric pendulum 144a.
[0049] Also, the bottom gear 142c interlocked with the central gear
142b rotates in a direction opposite to that of the central gear
142b, and at the same time, the eccentric pendulum 144c rotates in
a direction opposite to that of the eccentric pendulum 144b.
[0050] Accordingly, when the gears 142a, 142b, and 142c rotate as
described above, eccentric pendulums 144a, 144b, and 144c mounted
on the gears 142a, 142b, and 142c generate centrifugal force by
rotation moments. In this case, the rotation moment of the
eccentric pendulum 144b maintains a rotation moment ratio 2:1 to
the rotation moments of the eccentric pendulums 144a and 144b,
corresponding to a double thereof. Accordingly, the centrifugal
force toward right, generated by the rotation moment of the
eccentric pendulum 144b, are mutually compensated with the
centrifugal forces toward left, generated by the rotation moments
of the eccentric pendulums 144a and 144c not to generate lateral
vibration.
[0051] Also, in such status, when the gears 142a, 142b, and 142c
rotate more, as shown in FIG. 13, all of the eccentric pendulums
144a and 144c of the top and bottom gears 142a and 142c are located
upward and the eccentric pendulum 144b of the central gear 142b is
also located upward, thereby mutually overlapping the centrifugal
forces by the rotation moments of the eccentric pendulums 144a and
144c and the eccentric pendulum 144b to generate vibration pushing
up the vibrating body 130.
[0052] Also, in such status, when the gears 142a, 142b, and 142c
rotate more, as shown in FIG. 14, there are generated centrifugal
forces toward right from the rotation moments of the eccentric
pendulums 144a and 144c and centrifugal force toward right from the
rotation of the eccentric pendulum 144b, whose size is
corresponding to the centrifugal forces toward left in such a way
that those are mutually compensated not to generate lateral
vibration.
[0053] On the other hand, in such status, when the gears 142a,
142b, and 142c rotate more, as shown in FIG. 11, all of the
eccentric pendulums 144a and 144c and the eccentric pendulum 144b
are located downward in such a way that all of the centrifugal
forces by the rotation moments of the eccentric pendulum 144a and
144c and the eccentric pendulum 144b are mutually overlapped
downward to generate vibration pushing down the vibrating body
130.
[0054] Accordingly, the vibrating nipper 100 allows that the gears
142a, 142b, and 142c continuously rotated due to oil hydrolytic
motor 140 in such a way that the centrifugal forces are mutually
compensated in a lateral direction not to generate lateral
vibration and are mutually overlapped in a longitudinal direction
to generate longitudinal vibration, thereby continuously vibrating
the vibrating body 130 and the nipper blade 135 mounted on the
bottom of the vibrating body 130.
[0055] When the vibrating body 130 is formed as described above,
the width w1 of the frame 120 and the vibrating body 130 is much
smaller than the width W of general vibrating bodies with gears
laterally arranged to allow the breadth of a frame with a structure
strong to support lateral excavation-resistance force to be
narrower in such a way that the vibrating body 130 may be deeply
inserted into the ground along the nipper blade 135 and excavation
performance may be improved when excavating the ground.
[0056] Also, when the vibrating nipper 100 vibrates as described
above and excavates the ground using the nipper blade 135,
excavation-resistance in a lateral direction A is applied from the
ground to the nipper blade 135 as shown in FIGS. 3 and 4. In this
case, the vibrating body 130 whose front top and bottom corners
132a and 132b are connected to the one sides of the links 162a and
162b using the pins 164a and 164b moves tracing arcs longitudinal
to the frame 120.
[0057] Accordingly, force in the lateral direction A may be
effectively supported, in which the front corner 138a and the rear
corner 138b of the vibrating body 130 are supported by the
plurality of buffers 170 built in the frame 120, respectively,
thereby effectively buffering vibration generated by the vibrating
body 130.
[0058] As described above, since the vibrating nipper 100 may be
manufactured to have the width w1 of the frame 120 and the
vibrating body 130 relatively narrower than general ones, though
the nipper blade 135 is inserted into the ground, the vibrating
body 130 may be deeply inserted into the ground along the nipper
blade 135, thereby increasing the depth of excavation and more
improving excavation performance.
[0059] Also, since the front top and bottom corners 132a and 132 of
the vibrating body 130 are connected to the frame 120 surrounding
the vibrating body 130 using the links 162a and 162b and the pins
164a, 164b, 164c, and 164d to longitudinally trace arcs and to be
displaceable, though the nipper blade 135 receives great
excavation-resistance in the lateral direction A from the ground
while excavating, the nipper blade 135 and the vibrating body 130
are displaced in a longitudinal arc direction by lever-operation of
the links 162a and 162b toward the frame 120 and it is possible to
support the excavation-resistance in the lateral direction A toward
the nipper blade 135 in such a way that the nipper blade 135 freely
operates, the buffers 170 supporting the vibrating body 130 is
protected not to be damaged, and durability thereof is greatly
improved.
[0060] The present invention may be applied to the field of
manufacturing heavy equipment.
[0061] While the present invention has been particularly shown and
described with reference to exemplary embodiments thereof, it will
be understood by those skilled in the art that various changes in
form and details may be made therein without departing from the
spirit and scope of the invention as defined by the appended
claims.
* * * * *