VIBRATION NIPPER FOR HEAVY MACHINERY

FIELD

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

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.

However, general methods of striking using a breaker cause great noises, it is needed heavy equipment with low noise and high efficiency.

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.

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.

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.

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.

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.

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.

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

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.

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.

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.

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.

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.

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.

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.

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

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:

FIG. 1 is a perspective view illustrating a general vibrating nipper;

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;

FIG. 3 is a perspective view illustrating a vibrating nipper for heavy equipment according to an embodiment of the present invention;

FIG. 4 is a side view illustrating the vibrating nipper of FIG. 3;

FIG. 5 is a longitudinal cross-section of the vibrating nipper of FIG. 3;

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;

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;

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;

FIG. 9 is a perspective view illustrating buffers provided in the vibrating nipper of FIG. 3;

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

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

Hereinafter, an exemplary embodiment of the present invention will now be described in detail. Like reference numerals refer to the like elements throughout.

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.

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 ∩ 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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The present invention may be applied to the field of manufacturing heavy equipment.

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.

VIBRATION NIPPER FOR HEAVY MACHINERY

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CPC

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