EP2910689A1 - Hydraulikhammervorrichtung für bagger - Google Patents

Hydraulikhammervorrichtung für bagger Download PDF

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Publication number
EP2910689A1
EP2910689A1 EP13843264.6A EP13843264A EP2910689A1 EP 2910689 A1 EP2910689 A1 EP 2910689A1 EP 13843264 A EP13843264 A EP 13843264A EP 2910689 A1 EP2910689 A1 EP 2910689A1
Authority
EP
European Patent Office
Prior art keywords
ripper
cylinders
cylinder
integrally connected
attacks
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13843264.6A
Other languages
English (en)
French (fr)
Other versions
EP2910689A4 (de
Inventor
Javier Aracama Martinez De Lahidalga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=50434395&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2910689(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from ES201231013U external-priority patent/ES1077891Y/es
Priority claimed from ES201231011U external-priority patent/ES1077883Y/es
Application filed by Individual filed Critical Individual
Publication of EP2910689A1 publication Critical patent/EP2910689A1/de
Publication of EP2910689A4 publication Critical patent/EP2910689A4/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/30—Auxiliary apparatus, e.g. for thawing, cracking, blowing-up, or other preparatory treatment of the soil
    • E02F5/32—Rippers
    • E02F5/323—Percussion-type rippers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/966—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements of hammer-type tools
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels

Definitions

  • the object of the present invention is a ripper-type hydraulic hammer device formed as an implement for an excavator which delivers blows to and digs up rock, concrete, asphalt, or any other type of ground and essentially consists of a hydraulic motor which receives oil flow and pressure from the excavator and is responsible for operating a series of elements hammering the ripper, giving it a movement which delivers blows to the ground.
  • Hydraulic hammers are extremely well-known in the field of public works as a basic implement for breaking hard grounds. These hammers are generally formed by an essentially cylindrical body internally housing a piston configured for delivering blows to a ground rod which, floating on at least one bushing, is responsible for attacking the ground.
  • the ground rod has a vertical stroke.
  • the operation of the hammer essentially starts from receiving oil from the excavator, putting pressure on the piston, such that it moves down very quickly and delivers blows to the ground rod, and the latter in turn delivers blows to the ground.
  • the piston moves up, the piston returns the oil to the excavator and loads a nitrogen chamber, such that nitrogen pressure strongly pushes against the piston, delivering blows to the ground rod and the ground accordingly.
  • ground rod is a floating element independent of the piston, since it must logically be made of a much stronger structure. If the piston was delivering blows directly, it would have to be made of special steel, and furthermore, in the event that it wore out, the entire assembly would have to be replaced, which would increase the cost of the system disproportionally. Given the floating structure supported on special bushings, the ground rod generates side clearances during use which in a long run results in the ground rod tilting and blows being delivered to the piston in a non-planar manner, so if there is no constant maintenance, the ground rod deforms, causing the piston and therefore the hammer to break in many cases. Examples of conventional or simplified hammers can be found in patent documents US5445323 and ES2296139 .
  • Patent documents describing different hammer configurations with different distributions for solving different technical problems include ES2181716 (preventing water hammer in drilling), ES1075243 (boring and delivering blows by means of rotating the ground rod) and ES2296153 (describing a hammer having a distribution valve with improved tightness).
  • Patent document US6517164 combines the advantages of hydraulic hammers and rippers. Nevertheless, its structure is not compact, rather they are elements exchangeable through force transmission means which, in practice, means that the implements for attacking the ground are floating implements and therefore would also tend to break along their connection and rotating shaft.
  • Another patent document combining both devices is US4666213 , but as in the preceding case they are non-integrated superimposed devices that suffer from the same problems as conventional hammers.
  • the present invention relates to a hydraulic hammer device for excavators comprising at least one ripper and an energy accumulator where the energy accumulator is integrally connected to said ripper and located on the longitudinal shaft thereof, the ground being attacked on said shaft between the retracted and deployed positions of the ripper and characterized in that it comprises a cylinder which is integrally connected to the ripper and housed therein.
  • a second particular embodiment comprises at least two cylinders integrally connected to the ripper and housed therein, forming between them an angle the vertex of which coincides with the shaft which attacks the ground; and where each of said cylinders comprises an energy chamber, the energy chambers of the cylinders communicating with one another, said cylinders being configured for alternating movement.
  • Energy chamber is understood as the pressure chamber in the upper portion of the cylinder which is compressed by the upward movement of the plunger (caused in turn by the injection of oil from the excavator) and is responsible for thrusting said plunger in its downward movement due to the accumulated pressure.
  • the energy chamber is typically filled with nitrogen and/or any compressible fluid, in general.
  • a piston does not have the same thrust at the start of the stroke as at the end.
  • the energy chambers of both cylinders are communicated to prevent this.
  • the pressure in both chambers would be about the same, therefore, the pressure would be kept constant in the stroke of both cylinders.
  • the pressure in both chambers will not be 100% constant since, as mentioned, the cylinder that moves down does so faster than the cylinder that moves up. Nevertheless, the fluctuation of pressures is minimal, which significantly improves yield compared to conventional hammers, without changing the pressure from the machine and without sending the oil to the return tank.
  • reaction to the blow compresses the accumulator, i.e., loading it, whereas the accumulator is unloaded when blow is delivered, i.e., it decompresses, adding the accumulated force to that of the blow itself due to the cylinders, since the accumulator is aligned with the attacking shaft, as indicated.
  • the accumulator advantageously dampens the transmission of vibrations to the rest of the machine.
  • the device object of the invention improves the yield of known hydraulic or pneumatic hammers working on particularly hard grounds, furthermore improving their service life.
  • Another advantage is that the combination of a ripper and a hammer allows both breaking up the ground (by means of the cylinder) and digging up the ground (by means of the ripper) something which is impossible up until now.
  • Figure 1 shows a schematized view of the device object of the invention in a practical embodiment with two cylinders (2,3).
  • Figure 2 shows a view of the ripper (1) which is part of the invention, and of the arrangement of the cylinders (2,3) inside same.
  • Figure 3 shows a perspective view of the device object of the invention, in which the arrangement of the cylinders (2,3) in relation with the entire device is shown, whereas Figure 4 shows a complete view of the assembly, except the outer protections of the ripper (1).
  • Figure 5 shows a schematized view of the device object of the invention in a practical embodiment with a single cylinder.
  • the hydraulic hammer device for excavators object of the present invention is used for delivering blows to and digging up extremely hard grounds, such as rock (granite) and the like.
  • the device essentially comprises a ripper (1) itself, at the lower end of which there is arranged a tooth (11) connected to the body of the ripper (1) by means of a bolt (12) or the like, such that said tooth (11) can be replaced if it wears out.
  • a space (13) provided for such purpose there are housed two cylinders (2,3) integrally connected to the body of the ripper (1) and arranged with respect to one another such that the force vector (F2,F3) of both cylinders (2,3) is oriented towards one and the same point coinciding with the attack vector (F1) which attacks the bottom of the ripper and which in this embodiment coincides with the connection point (12) of the tooth (11) with the ripper (1).
  • the angle is 14o, although said value will vary depending on the number of cylinders, since this number is only limited by the measurements of the body of the ripper (1), the only design condition being that all the force vectors are oriented towards the same point and that the latter coincides with the attack vector (F1) of the ripper (1).
  • Each cylinder (2,3) comprises in its upper portion an energy chamber (21,31) filled with nitrogen (a compressible fluid, in general) such that when the plunger of the cylinder moves up due to the injection of oil from the excavator (not shown in the attached drawings), the fluid (i.e., the nitrogen) is compressed and when the machine stops injecting the oil, it is the pressure in said energy chambers (21,31) that thrusts the cylinder (2,3) downwards, delivering blows to the body of the ripper (1) itself in a region of impact (14).
  • nitrogen a compressible fluid, in general
  • said region of impact (14) can be formed by a dolly connected to the ripper (1) and replaceable in the case of deformation.
  • both chambers (21,31) To keep a quasi-constant pressure in both chambers (21,31), they are communicated with one another (22), facilitating the alternating movement of both cylinders (2,3) since when the first cylinder (2) moves down, the second cylinder (3) moves up and vice versa. Given that the cylinder that moves down is always faster, when the second cylinder (3) moves up and reaches the end, it sends a signal to a valve so that the first cylinder (2), which was on stand-by, starts to move up also.
  • the alternating movement between both cylinders (2,3) therefore involves injecting oil to either cylinder, without returning to the machine.
  • the hammer-blow speed can be controlled through the injection of oil (more or less oil) to the cylinders (2,3) depending on the hardness of the ground.
  • the control element can be a shutoff cock, a valve or the like.
  • An energy accumulator (4) preferably an air cushion or a pneumatic cylinder, is integrally connected between the body of the ripper (1) and the head (5) of the machine such that it is loaded (compressed) due to the reaction force of the blow of the cylinders (2,3) and unloaded (decompressed) when the device attacks the ground, since the accumulator (4) is aligned in said shaft, adding a new force component (F4) in the blow. Due to this, the actual hammer-blow force is the sum of F1 + F4.
  • a cylinder (2) integrally connected to the body of the ripper (1) and arranged with respect to one another such that the force vector (F2) of the cylinder (2) is aligned with the attack vector (F1) which attacks the bottom of the ripper and which in this embodiment coincides with the connection point (12) of the tooth (11) with the ripper (1).
  • the cylinder delivers blows to a region of impact (14), where in another practical embodiment, said region of impact (14) can be formed by a dolly connected to the ripper (1) and replaceable in the case of deformation.
  • the hammer-blow speed can be controlled through the injection of oil (more or less oil) to the cylinder (2) depending on the hardness of the ground.
  • the control element can be a shutoff cock, a valve or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Fluid-Pressure Circuits (AREA)
EP13843264.6A 2012-10-03 2013-09-30 Hydraulikhammervorrichtung für bagger Withdrawn EP2910689A4 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ES201231013U ES1077891Y (es) 2012-10-03 2012-10-03 Dispositivo percutor hidraulico para maquinas excavadoras
ES201231011U ES1077883Y (es) 2012-10-03 2012-10-03 Dispositivo percutor hidraulico para maquinas excavadoras
PCT/ES2013/070672 WO2014053686A1 (es) 2012-10-03 2013-09-30 Dispositivo percutor hidráulico para máquinas excavadoras

Publications (2)

Publication Number Publication Date
EP2910689A1 true EP2910689A1 (de) 2015-08-26
EP2910689A4 EP2910689A4 (de) 2016-07-20

Family

ID=50434395

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13843264.6A Withdrawn EP2910689A4 (de) 2012-10-03 2013-09-30 Hydraulikhammervorrichtung für bagger

Country Status (23)

Country Link
US (1) US20150275474A1 (de)
EP (1) EP2910689A4 (de)
JP (1) JP2015532370A (de)
KR (1) KR20150063412A (de)
CN (1) CN104781475A (de)
AU (1) AU2013326422A1 (de)
BR (1) BR112015006987A2 (de)
CA (1) CA2887378A1 (de)
CL (1) CL2015000786A1 (de)
CR (1) CR20150173U (de)
EA (1) EA201590668A1 (de)
EC (1) ECSMU15017016U (de)
GT (1) GT201500079A (de)
HK (1) HK1211639A1 (de)
IL (1) IL237913A0 (de)
MX (1) MX2015003480A (de)
NI (1) NI201500044U (de)
PE (1) PE20150588A1 (de)
PH (1) PH12015500668A1 (de)
SG (1) SG11201502383YA (de)
TN (1) TN2015000116A1 (de)
WO (1) WO2014053686A1 (de)
ZA (1) ZA201502982B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170082437A1 (en) * 2015-09-21 2017-03-23 Caterpillar Inc. Plumb bob assembly for hyraulic hammer
US10245714B2 (en) * 2015-11-13 2019-04-02 Caterpillar Inc. Hydraulic buffer with fast startup
US10562165B2 (en) 2016-04-10 2020-02-18 Caterpillar Inc. Hydraulic hammer
ES2684509B1 (es) * 2017-03-31 2019-07-16 Talleres Betono S A Conjunto de percusion
KR102486334B1 (ko) * 2020-11-10 2023-01-09 (주)대동이엔지 저진동 브리오 리퍼조립체 및 이를 이용한 암파쇄공법

Family Cites Families (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2228445A (en) * 1938-10-12 1941-01-14 Velbiss Charles Dudley De Excavating bucket
US3386769A (en) * 1966-01-07 1968-06-04 White Pine Copper Co Rock-breaking apparatus
US3512284A (en) * 1969-06-02 1970-05-19 Freddie J Haynes Back hoe tooth structure
JPS5045208Y1 (de) * 1970-05-12 1975-12-22
US3729137A (en) * 1971-04-12 1973-04-24 Caterpillar Tractor Co Mechanically actuated water cannon
US3770322A (en) * 1971-04-12 1973-11-06 Caterpillar Tractor Co Apparatus for fracture of material in situ with stored inertial energy
JPS5010005U (de) * 1973-05-24 1975-02-01
JPS50111107U (de) * 1974-02-20 1975-09-10
US3958831A (en) * 1974-05-28 1976-05-25 Kabushiki Kaisha Komatsu Seisakusho Tunnel excavator
DE2542305C3 (de) * 1974-09-30 1981-12-17 Kabushiki Kaisha Komatsu Seisakusho, Tokyo Bodenaushubgerät
US4044838A (en) * 1975-04-21 1977-08-30 American Tractor Equipment Corporation Automatic control for ripper tool
US4379595A (en) * 1981-02-17 1983-04-12 Caterpillar Tractor Co. Ripper with offset impacting means and slotted shank
DE3335509C2 (de) * 1983-09-30 1986-05-07 Karl Schaeff GmbH & Co, 7183 Langenburg Gesteinsbrecher-Räumwerkzeug-Kombination für eine Arbeitsmaschine
US4625438A (en) * 1985-09-20 1986-12-02 Mozer Daniel S Excavating bucket having power driven, individually controlled digging teeth
US4666213A (en) * 1985-09-27 1987-05-19 Howard Artis N Rock breaker tool
US4834461A (en) * 1987-11-18 1989-05-30 Caterpillar Inc. Control system for a multiple shank impact ripper
JPH072736Y2 (ja) * 1988-09-30 1995-01-25 株式会社小松製作所 直動式衝撃リッパ装置
US4959915A (en) * 1989-03-06 1990-10-02 Caterpillar Inc. Impact bucket apparatus
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SE528033C2 (sv) * 2004-03-12 2006-08-15 Atlas Copco Constr Tools Ab Hydraulslagverk
SE528040C2 (sv) 2004-03-12 2006-08-15 Atlas Copco Constr Tools Ab Hydraulisk brythammare
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CN101319508A (zh) * 2007-06-08 2008-12-10 沈阳军区司令部工程科研设计院 多功能工程设备中的液压冲击振动系统
EP2201180B1 (de) * 2007-08-16 2014-07-30 Jeong Yel Park Vibrationszange
CN201384964Y (zh) * 2009-03-05 2010-01-20 天津辰龙重工机械有限公司 破碎锤用液压缸
AU2010272444B2 (en) * 2009-07-16 2014-12-18 Javier Aracama Martinez De Lahidalga Hydraulic ripper for excavators
SE535904C2 (sv) * 2010-11-03 2013-02-12 Brokk Ab Brytanordning vid en fjärrstyrd med manöverbar arm utrustad arbetsmaskin
ES1075243Y (es) 2011-02-02 2011-11-24 Salamanca Maria Cuadrado Martillo perforador acoplable a cualquier tipo de excavadora

Also Published As

Publication number Publication date
ECSMU15017016U (es) 2015-12-31
EP2910689A4 (de) 2016-07-20
SG11201502383YA (en) 2015-05-28
NI201500044U (es) 2015-05-29
EA201590668A1 (ru) 2015-08-31
HK1211639A1 (en) 2016-05-27
IL237913A0 (en) 2015-05-31
US20150275474A1 (en) 2015-10-01
KR20150063412A (ko) 2015-06-09
TN2015000116A1 (en) 2016-06-29
CL2015000786A1 (es) 2015-08-21
AU2013326422A1 (en) 2015-05-07
CR20150173U (es) 2015-05-25
WO2014053686A1 (es) 2014-04-10
MX2015003480A (es) 2015-06-22
GT201500079A (es) 2016-11-16
JP2015532370A (ja) 2015-11-09
CA2887378A1 (en) 2014-04-10
PE20150588A1 (es) 2015-04-26
CN104781475A (zh) 2015-07-15
PH12015500668A1 (en) 2015-05-18
BR112015006987A2 (pt) 2017-07-04
ZA201502982B (en) 2016-11-30

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