WO2013109085A1

WO2013109085A1 - Shock absorbers for a vibratory ripper

Info

Publication number: WO2013109085A1
Application number: PCT/KR2013/000405
Authority: WO
Inventors: Jae Ryong Jo; Hun Jae Lee
Original assignee: Gb Industries Co., Ltd.
Priority date: 2012-01-19
Filing date: 2013-01-18
Publication date: 2013-07-25
Also published as: KR20130085134A; KR101379831B1

Abstract

Provided is a shock absorber for a vibrating ripper generating vibrations by using eccentric weights longitudinally (vertically) arranged and built in a vibrating body, the shock absorber having a configuration in which porous upper dampers are mounted on a top of an inside of a frame to restrain vibrations generated while the vibrating body is ascending or descending and damper bushes with vibration-resistant rubbers attached are mounted on links connecting the frame and the vibrating body to restrain vibrations at the links. According to the present embodiment, it is effectively absorbed transferring the vibrations generated by the vibrating body to the arm of the heavy equipments via the links and the frame in such a way that components of the arm of the heavy equipments such as a hydraulic cylinder of the arm may be not damaged, thereby extending lifespan thereof and it is possible to largely reduce fatigue of an operator while crushing rocks

Description

SHOCK ABSORBERS FOR A VIBRATORY RIPPER

The present invention relates to a shock absorber for a vibratory ripper mounted on heavy equipments and crushing rocks, and more particularly, to a shock absorber for a vibratory ripper, in which an upper damper is mounted on a top inside a frame of the vibratory ripper generating vibrations by using eccentric weights built in a vibrating body in such a way that vibrations generated while the vibrating body is vertically transferred is restrained by the upper damper and a damper bush with a vibration-resistant rubber is mounted on a link connecting the frame and the vibrating body to restrain vibrations at the link, thereby preventing damages of components of the heavy equipments and reducing extreme fatigue of an operator.

Generally, in the field of construction, to crush bedrock, a breaker formed of a metallic pin is mounted on an arm of heavy equipment and strikes the bedrock to be crushed. However, since general methods of striking using a breaker generate 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, it is necessary to provide 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.

To perform such functions, there have been proposed vibratory rippers. General vibratory rippers have a horizontal structure and a vibrating body in which two axes of vibrators are installed by laterally alternating two pair of gears with one another, the gears with an eccentric weight being rotated by a hydraulic motor.

In the case of such vibrating rippers, since gears rotated by the hydraulic motor are laterally alternated with one another to be horizontally arranged in the vibrating body, a width of the vibrating body is relatively broaden, which prevents the vibrating body from entering the ground though a blade of the ripper burrows the ground.

Accordingly, in general horizontal structure in which gears are laterally arranged inside the vibrating body, it is impossible to excavate the ground deep.

To resolve such problems, the applicant of the present invention has proposed a vertical vibrating ripper 1 for heavy equipments as shown in FIGS. 1 and 2.

In the vertical vibrating ripper 1 for heavy equipments, a vibrating body 20 is mounted inside a frame 5, the vibrating body 20 in which gears (not shown) rotated by a hydraulic motor 10 are vertically arranged to be rotatable, an eccentric weight is mounted on the respective gears to generate a vibration in a vertical direction while the gears are being rotated, and a ripper blade 30 is mounted on a bottom of the vibrating body 20 in a longitudinal direction of the vibrating body to allow the vibrating body 20 to be inserted deep into the ground according to the ripper blade 30 while excavating the ground.

When the vertical vibrating ripper 1 excavates the ground, the vibrating body 20 is capable of being inserted deep into the ground according to the ripper blade 30, thereby largely improving excavation performance to be excellent.

Also, when the ripper blade 30 excavates the ground, though the ripper blade 30 receives lateral resistance from the ground, since the ripper blade 30 is connected to the vibrating body 20 in a link 40 to be capable of being vertically displaced, the lateral resistance against the ripper blade 30 is largely absorbed in such a way that an operation of the ripper blade 30 is free and a buffer 50 is protected, thereby largely improving durability thereof.

However, the vertical vibrating ripper 1 has a certain vacant space 5a inside a top of the frame 5 in which the vibrating body 20 is built to vertically move.

Also, to allow the ripper blade 30 to excavate and to allow the vibrating body 20 to vertically move inside the frame 5, the frame 5 is connected to the vibrating body 20 by using a plurality of vertical links 40 and link pins 42 as shown in FIG. 2.

The vertical vibrating ripper 1 generates strong vibrations while operating to crush rocks, and the vibrations generated by the vibrating body 20 are transferred to the frame 5 via the links and the link pins 42, vibrates an arm 60 of the heavy equipments with the vibrating ripper 1 mounted thereon to make a great noise, and damages a hydraulic cylinder 60a of the arm 60 to shorten a lifespan thereof.

In addition, such vibrations are transferred to an operator of the heavy equipments via the arm 60 of the heavy equipments to give the operator severe fatigue while crushing rocks.

Accordingly, the present invention is directed to a shock absorber for a vibrating ripper that substantially obviates one or more of the problems due to limitations and disadvantages of the related art, the shock absorber for a vibrating ripper effectively preventing vibrations generated by a vibrating body from being transferred to an arm of heavy equipments via links and a frame in such a way that components of the arm of the heavy equipments such as a hydraulic cylinder of the arm may be not damaged, thereby extending lifespan thereof and it is possible to largely reduce fatigue of an operator while crushing rocks.

According to an aspect of the present invention, there is provided a shock absorber used for a vibrating ripper mounted on heavy equipments to crush rocks, the shock absorber having a configuration in which, on a top of an inside of a metallic frame with a top connected to an arm of the heavy equipments to be rotatable, upper dampers absorbing a shock transferred to the frame by elastically supporting a top surface of a vibrating body while the vibrating body is ascending are mounted in such a way that a transfer of vibrations of the vibrating body in a vertical direction to the frame is restrained.

The upper dampers may be mounted on the top of the inside of the frame by bolt-fastening a fastened metallic plate boned to top surfaces of the upper dampers to a bracket of the frame by using a plurality of fastening bolts and are formed of an elastic material with porous holes, respectively, in such a way that the porous holes are compressed and elastically absorb the shock of the vibrating body while the vibrating body is vertically moving.

In the shock absorber, damper bushes with vibration-resistant rubber rings may be mounted on links connecting the frame to the vibrating body, respectively, to restrain vibrations at the links.

According to another aspect of the present invention, there is provided a shock absorber used for a vibrating ripper mounted on heavy equipments to crush rocks, the shock absorber having a configuration in which damper bushes with rubber rings are mounted on insides of link-holes of links connecting a metallic frame with a top connected to an arm of the heavy equipments to a vibrating body, respectively, in such a way that it is restrained transferring of vibrations of the vibrating body in a vertical direction to the frame via the links.

The damper bush may have a structure in which the rubber ring is inserted into inner and outer metallic rings and a link-pin is inserted into and fastened to an inside of the inner ring.

According to the present invention, a shock absorber for a vibrating ripper includes upper dampers formed of an elastic material with porous holes, the upper dampers being mounted on a top of an inside of a frame and elastically supporting a top surface of a vibrating body to absorb a shock transferred to the frame while the vibrating body is ascending. Also, damper bushes with vibration-resistant rubber rings are mounted on links connecting the frame to the vibrating body to restrain a transfer of vibrations at the links.

Accordingly, according to the shock absorber for the vibrating ripper, vibrations generated by the vibrating body are effectively absorbed not to be transferred to an arm of heavy equipments via the links and the frame in such a way that components of the arm of the heavy equipments such as a hydraulic cylinder of the arm may be not damaged, thereby extending lifespan thereof and it is possible to largely reduce fatigue of an operator while crushing rocks.

FIG. 1 is a side view illustrating a vibrating ripper of related art;

FIG. 2 is an external perspective view illustrating an exploded link portion of the vibrating ripper of related art;

FIG. 3 is a side view illustrating a vibrating ripper with a shock absorber for the vibrating ripper according to an embodiment of the present invention;

FIG. 4 is a view illustrating a structure in which an upper damper is mounted on inside a frame in the shock absorber for the vibrating ripper according to an embodiment of the present invention;

FIG. 5 is a view illustrating a porous structure formed on the upper damper in the shock absorber for the vibrating ripper according to an embodiment of the present invention;

FIG. 6 is an external perspective view illustrating an exploded link portion of the shock absorber for the vibrating ripper according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view illustrating a coupled structure in which a damper bush included in the shock absorber for the vibrating ripper is mounted on the link according to an embodiment of the present invention;

FIG. 8 is a side-sectional view illustrating a structure of the damper bush included in the shock absorber for the vibrating ripper according to an embodiment of the present invention; and

FIG. 9 is a view illustrating operations of the shock absorber for the vibrating ripper according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to accompanying drawings.

A vibrating ripper to which a shock absorber according to an embodiment of the present invention is applied includes, as shown in FIG. 3, a metallic frame 105 whose top is connected to an arm 60 of heavy equipments to be rotatable and a vibrating body 120 connected to the frame 105 via links 140 inside the frame 105 and operated by a hydraulic motor to generate vibrations in a vertical direction.

The shock absorber 100 for the vibrating ripper according to the present embodiment includes an upper damper 130 mounted on an inside of a top of the frame 105, the upper damper 130 absorbing a shock transferred to the frame 105 by elastically supporting a top surface of the vibrating body 120 while the vibrating body 120 is ascending and restraining a transfer of the vibrations of the vibrating body 120 in a vertical direction to the frame 105.

As shown in FIGS. 4 and 5, the upper damper 130 is formed of an elastic material with porous holes 132, for example, may be formed of a urethane rubber material with a hexagonal section and is fastened to a bottom of an upper plate of the frame 105.

That is, a plurality of the upper dampers 130 is mounted on the inside of the top of the frame 105 by bolt-fastening a fastened metallic plate 134 bonded to top surfaces of the upper dampers 130 to a bracket 138 fastened to the bottom of the upper plate of the frame 105 by using a plurality of fastening bolts 136.

The upper damper 130 as described above is provided in a vacant space 5a in a top inside of a frame 5 of a vibrating ripper 1 according to related art to elastically absorb a shock of the vibrating body 120 by compressing the porous holes 132 while the vibrating body 120 vertically moves.

The porous holes 132 as described above allow much more pores to be formed inside the upper damper 130 to more stably absorb the shock of the vibrating body 120.

Also, as shown in FIG. 6, the shock absorber 100 for the vibrating ripper has a configuration in which damper bushes 150 with vibration-resistant rubber rings 152 are mounted on the links 140 to restrain vibrations at the links 140.

As shown in FIG. 7, the four damper bushes 150 are provided for the one link 140 and restrain vibrations transferred from the vibrating body 120 to the frame 105 via the link 140.

As shown in FIG. 8, the damper bush 150 has a configuration in which the rubber ring 152 is inserted into between an inner and outer

metallic rings

154 and 156, the outer metallic ring 156 being assembled inside a hole of the link 140 by using, for example, one of a hot-driving method, a cold-driving method, and an indentation-driving method, a link pin 142 being inserted into and fastened to the inside of the inner metallic ring 154.

The shock absorber 100 for the vibrating ripper, the shock absorber 100 with the configuration described above, includes the upper dampers 130 formed of the elastic body with the porous holes 132 and mounted on the inside of the top of the frame 105 to elastically support the top surface of the vibrating body 120 while the vibrating body 120 is ascending and the damper bush 150 with the vibration-resistant rubber rings 152 provided on the link 140 connecting the frame 105 to the vibrating body 120 to restrain a transfer of vibrations at the link 140.

That is, as shown in the left of FIG. 9, when the vibrating ripper with the shock absorber 100 mounted on is lifted from the ground or rocks G, in other words, in a no-load state, a ripper blade 30 descends due to a self-load and the upper damper 130 is not pressed.

However, as shown in the right of FIG. 9, the vibrating ripper with the shock absorber 100 is pushed toward the rocks G to crush the rocks G, the vibrating body 120 ascends to a certain height and pushes a bottom surface of the upper damper 130 to a certain depth.

In the state as described above, when a hydraulic motor 10 of the vibrating body 120 operates and vibrations are generated, the upper damper 130 repeats being pressed to an amplitude of vibration of the vibrating body 120 and being restored while being pressed. In this case, the upper damper 130 guides vertical movements of the vibrating body 120 to a force for being pressed, thereby allowing the movements of the vibrating body 120 to be stable.

Also, the vibrations generated while the vibrating body 120 is moving are removed by compensating with contraction and elastic restoration operations of the porous holes 132 of the upper damper 130, thereby restraining a transfer of the vibrations to the arm 60 of the heavy equipments.

Also, while the vibrating body 120 is vertically moving, the link 140 is vertically pivoting, in which the rubber rings 152 of the damper bushes 150 mounted on the link 140 elastically absorb the vibrations, thereby effectively restraining the transfer of the vibrations via the link 140.

As described above, according to the shock absorber 100 for the vibrating ripper according to the present embodiment, since the vibrations generated by the vibrating body 120 transferred to the arm 60 of the heavy equipments via the link 140 and the frame 105 are effectively absorbed, components of the heavy equipments such as a hydraulic cylinder 60a of the arm 60 may be not damaged, thereby extending lifespan thereof and it is possible to largely reduce fatigue of an operator while crushing rocks.

While the present invention has been described and illustrated herein with reference to the preferred embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made therein without departing from the spirit and scope of the invention. Thus, it is intended that the present invention covers the modifications and variations of this invention that come within the scope of the appended claims and their equivalents.

this invention can be applied in the field of manufacturing a vibratory ripper.

Claims

A shock absorber used for a vibrating ripper mounted on heavy equipments to crush rocks, the shock absorber having a configuration in which, on a top of an inside of a metallic frame with a top connected to an arm of the heavy equipments to be rotatable, upper dampers absorbing a shock transferred to the frame by elastically supporting a top surface of a vibrating body while the vibrating body is ascending are mounted in such a way that a transfer of vibrations of the vibrating body in a vertical direction to the frame is restrained.
The shock absorber of claim 1, wherein the upper dampers are mounted on the top of the inside of the frame by bolt-fastening a fastened metallic plate boned to top surfaces of the upper dampers to a bracket of the frame by using a plurality of fastening bolts and are formed of an elastic material with porous holes, respectively, in such a way that the porous holes are compressed and elastically absorb the shock of the vibrating body while the vibrating body is vertically moving.
The shock absorber of claim 2, wherein damper bushes with vibration-resistant rubber rings are mounted on links connecting the frame to the vibrating body, respectively, to restrain vibrations at the links.
A shock absorber used for a vibrating ripper mounted on heavy equipments to crush rocks, the shock absorber having a configuration in which damper bushes with rubber rings are mounted on insides of link-holes of links connecting a metallic frame with a top connected to an arm of the heavy equipments to a vibrating body, respectively, in such a way that it is restrained transferring of vibrations of the vibrating body in a vertical direction to the frame via the links.
The shock absorber of claim 4, wherein the damper bush has a structure in which the rubber ring is inserted into inner and outer metallic rings and a link-pin is inserted into and fastened to an inside of the inner ring.