EP0149967B1 - Hydraulisch betätigte Schlagvorrichtung - Google Patents

Hydraulisch betätigte Schlagvorrichtung Download PDF

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Publication number
EP0149967B1
EP0149967B1 EP84730125A EP84730125A EP0149967B1 EP 0149967 B1 EP0149967 B1 EP 0149967B1 EP 84730125 A EP84730125 A EP 84730125A EP 84730125 A EP84730125 A EP 84730125A EP 0149967 B1 EP0149967 B1 EP 0149967B1
Authority
EP
European Patent Office
Prior art keywords
piston
percussion
control valve
valve
stroke
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.)
Expired
Application number
EP84730125A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0149967A1 (de
Inventor
Wilhelm Dipl.-Ing. Rode
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.)
Rudolf Hausherr & Soehne & Co KG GmbH
Original Assignee
Rudolf Hausherr & Sohne & Co KG GmbH
Rudolf Hausherr and Sohne GmbH and Co KG
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
Application filed by Rudolf Hausherr & Sohne & Co KG GmbH, Rudolf Hausherr and Sohne GmbH and Co KG filed Critical Rudolf Hausherr & Sohne & Co KG GmbH
Priority to AT84730125T priority Critical patent/ATE37315T1/de
Publication of EP0149967A1 publication Critical patent/EP0149967A1/de
Application granted granted Critical
Publication of EP0149967B1 publication Critical patent/EP0149967B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/145—Control devices for the reciprocating piston for hydraulically actuated hammers having an accumulator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/16—Valve arrangements therefor
    • B25D9/20—Valve arrangements therefor involving a tubular-type slide valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2209/00—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D2209/005—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously having a tubular-slide valve, which is coaxial with the piston

Definitions

  • the invention relates to a hydraulically operated impact device according to the preamble of patent claim 1.
  • a hydraulically operated impact device in which the control valve is displaceable in one direction by the moving piston, responds to the movement of the piston in the opposite direction and is then actuated by the hydraulic fluid in such a way that it moves in the opposite direction due to hydrostatic pressure.
  • the control valve is arranged on the side facing the striking tool. This arrangement has the disadvantage that the mass of the valve has to be moved during the entire working stroke. This hinders the acceleration of the percussion piston.
  • control valve travels a longer way than the control piston.
  • control valve On the other hand, the long way of the control valve means that the control valve must be caught. This leads to an undesired heating of the hydraulic medium. In addition, an undesired large oil volume is required to switch the control valve.
  • the control valve is guided inside and outside in order to obtain the chambers required for the return. Since tight manufacturing tolerances are required, high manufacturing costs will arise for this. Here, too, premature wear can occur due to transverse movements of the percussion piston.
  • the object of the present invention is to provide a striking device of the type described, which adapts the speed of the control process to the nature of the object to be struck in a substantially simplified control system and by taking advantage of the oil pressure rise when the striking piston strikes the striking tool.
  • control valve consists of a simple sleeve without transverse bore, which is reversed hydraulically in the stroke stroke and mechanically in the upward stroke as a function of the path and speed of the impact piston.
  • the control valve is held hydraulically in defined positions in the housing, except during the changeover process.
  • the control channel to the control valve is released and remains open at the beginning of the backward movement.
  • the tool and the object to be struck could be viewed like a spring system.
  • the nature of the object has an impact on the rebound speed. If, for example, hard rock is struck, the path to a standstill of the piston is almost zero. In contrast to the impact on soft rock, hard rock has a high rebound speed of the percussion piston and a momentary pressure increase in the oil column. Since this pressure is used to reverse the control valve, the reversing process for hard objects is faster as desired.
  • Another advantage of the invention is the simple structure of the impact device. Except for the control edges, the control valve has a diameter almost the same size as the cylinder of the percussion piston.
  • the housing has predominantly simple cylindrical bores for receiving the percussion piston.
  • the structure of the percussion piston is simple in terms of production technology and has the advantage that the contact surfaces to the housing are so far apart that no one strikes the percussion tool Wear of the piston guide occurs.
  • Another advantage of the striking device is the easy interchangeability of the piston. Since the diameter of the guide cylinder of the percussion piston is smaller than the inner diameter of the sleeve-shaped control valve, z. B. for repair purposes, the percussion piston can be replaced without dismantling the control valve.
  • the invention is based on drawings a schematically illustrated impact device explained in more detail.
  • the striking device consists of the housing 2, the striking piston 3 and the control valve 4, an impact tool 1, such as a chisel, drill or the like, being introduced axially into the housing on which the axially reciprocating percussion piston acts.
  • an impact tool 1 such as a chisel, drill or the like
  • Fig. 1 the percussion piston 3 has performed the blow.
  • the control edge 3.3 of the guide cylinder 3 "has opened the outlet 7.1 of the connecting channel 7.
  • the pressure oil has entered the annular space 8.2 via the feed 7.2 and has moved the control valve 4 in the direction of the striking tool 1 and the annular surface via the annular surface of the control edge 4.3 the control edge 4.6 of the control valve 4 against the annular surface 2.4 of the housing.
  • the oil from the annular groove 5 '" has reached the middle outlet 6.3 and the upper connection 6.4 to the oil outlet 6.
  • the annular space 5 "" is opened so that pressure oil from the pressure inlet 5 moves the control valve into the "return stroke” position via the annular surface of the control edge 4.4.
  • the control valve 4 has released the upper annular groove 6 "and the lower annular groove 6 '.
  • the oil from the inner annular space 8.1 can flow out to the oil outlet 6 via the upper drain 6.5.
  • the control valve 4 blocks the annular groove 5" and thus in this position the supply of the pressure oil via the supply 5.3 to the annular surface of the control edge 3.3.
  • the pressure of the oil present in the annular space 8.3 holds the control valve 4 in position over the annular surface of the control edge 4.4.
  • the pressure oil reaching the lower annular space 5 'via connection 5.2 and the feed 5.1 acts on the annular surface 3.1 of the cylinder 3' and moves the percussion piston in the direction of the side of the piston facing away from the percussion tool.
  • the percussion piston 3 hits the control valve 4 (FIG. 5).
  • a part of the outer wall of the pin 3.4 is pushed into the inner bore 4.2 of the control valve 4.
  • the oil located between the surfaces of the outer wall of the pin 3.4 of the ring surface 3.3 of the housing inner wall 2.1 and the ring surface of the lower edge 4.1 of the control valve 4 is enclosed in the resulting annular space.
  • the overlapping surfaces between the pin 3.4 and the inner bore 4.2 and the middle cylinder 3 "and the housing inner bore 2.1 provide sufficient sealing.
  • the sealing surface which is formed by the outer surface 4.7 and the housing inner surface 2.1 becomes smaller when the control valve 4 moves back.
  • the pressure of the oil from the annular groove 5 ′′ is present in the annular space described above.
  • the oil on the pressure side acts on the annular surface 3.3 of the percussion piston 3 and brakes its movement.
  • the control valve moves to the "stroke stroke" position (Fig. 2).
  • the pressure-side oil passes through the control edge 4.1 of the control valve 4 into the inner annular space 8.1.
  • the percussion piston is accelerated in the direction of the percussion tool, since the annular surface 3.5 is now also effective in the direction of impact in addition to the annular surface 3.3.
  • the oil of the central annular groove 5 ′′ flows through the connecting channel 7 and the annular space 3.2 to the oil outlet 6.
  • the control valve 4 in the "stroke stroke” position.
  • the control valve 4 lies with the end face 4.5 on the annular surface 2.3 of the housing 2.
  • the outflow of the oil from the annular space 8.1 into the upper drain 6.5 and the annular groove 6 "and 6 ' is prevented.
  • the pressure oil reaches the inlet 5.3 and the annular groove 5 "into space 8.1 and thus onto the end face 3.5 and 3.3 facing the striking tool and via the feed 5.1 onto the end face 3.1 of the striking piston facing the striking tool.
  • the striking piston designed as a differential piston moves in the direction of the striking tool.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Manufacture Of Iron (AREA)
  • Actuator (AREA)
EP84730125A 1984-01-03 1984-11-26 Hydraulisch betätigte Schlagvorrichtung Expired EP0149967B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84730125T ATE37315T1 (de) 1984-01-03 1984-11-26 Hydraulisch betaetigte schlagvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843400302 DE3400302A1 (de) 1984-01-03 1984-01-03 Hydraulisch betaetigte schlagvorrichtung
DE3400302 1984-01-03

Publications (2)

Publication Number Publication Date
EP0149967A1 EP0149967A1 (de) 1985-07-31
EP0149967B1 true EP0149967B1 (de) 1988-09-21

Family

ID=6224426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84730125A Expired EP0149967B1 (de) 1984-01-03 1984-11-26 Hydraulisch betätigte Schlagvorrichtung

Country Status (7)

Country Link
US (1) US4635531A (ja)
EP (1) EP0149967B1 (ja)
JP (1) JPS60150975A (ja)
AT (1) ATE37315T1 (ja)
DE (2) DE3400302A1 (ja)
FI (1) FI844848L (ja)
ZA (1) ZA8523B (ja)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4858701A (en) * 1987-11-30 1989-08-22 Weyer Paul P Fluid-powered impact device and tool therefor
DE58903827D1 (de) * 1989-03-23 1993-04-22 Menck Gmbh Hydraulikventilkombination fuer rammhaemmer.
FR2676953B1 (fr) * 1991-05-30 1993-08-20 Montabert Ets Appareil hydraulique a percussions.
DE69305839T2 (de) * 1992-01-21 1997-05-07 Bsp Int Foundation Ventilsteuervorrichtung
DE19652079C2 (de) 1996-12-14 1999-02-25 Krupp Berco Bautechnik Gmbh Fluidbetriebenes Schlagwerk
AT407919B (de) * 1998-01-19 2001-07-25 Boehler Pneumatik Internat Gmb Pneumatisch oder hydraulisch betreibbarer hammer und verwendung des hammers zum offenstellen oder zum verschliessen einer abstichöffnung eines metallurgischen gefässes
GB9802034D0 (en) * 1998-01-31 1998-03-25 Caldervale Engineering Service Fluid actuated tool
DE19804078A1 (de) * 1998-02-03 1999-08-05 Krupp Berco Bautechnik Gmbh Fluidbetriebenes Schlagwerk
FI107891B (fi) * 1998-03-30 2001-10-31 Sandvik Tamrock Oy Painenestekäyttöinen iskulaite
SE522213C2 (sv) * 2000-05-31 2004-01-20 Morphic Technologies Ab Hydrauliskt slag/anpressningsanordning
FR2811601B1 (fr) 2000-07-13 2002-10-11 Montabert Ets Appareil hydraulique a percussions
FR2811602B1 (fr) 2000-07-13 2002-10-11 Montabert Ets Appareil hydraulique a percussions
SE528033C2 (sv) * 2004-03-12 2006-08-15 Atlas Copco Constr Tools Ab Hydraulslagverk
FI119398B (fi) * 2006-12-21 2008-10-31 Sandvik Mining & Constr Oy Iskulaite
AT511810B1 (de) * 2011-09-27 2013-03-15 Tmt Bbg Res And Dev Gmbh Schlagwerk für eine hammereinrichtung und verfahren zum offenstellen einer abstichöffnung
ITBA20120055A1 (it) * 2012-09-24 2014-03-25 Tecna Group Srl Demolitore per escavatori con pistone e circuito idraulico ottimizzato
SE537608C2 (sv) * 2013-11-01 2015-07-28 Tools Pc Ab Const Pneumatisk slaganordning och förfarande vid pneumatisk slaganordning
CN103726783A (zh) * 2013-11-28 2014-04-16 江麓机电集团有限公司 一种新型套阀式液压冲击机构
US9840000B2 (en) * 2014-12-17 2017-12-12 Caterpillar Inc. Hydraulic hammer having variable stroke control
US20160221171A1 (en) * 2015-02-02 2016-08-04 Caterpillar Inc. Hydraulic hammer having dual valve acceleration control system
US20170157759A1 (en) * 2015-12-08 2017-06-08 Caterpillar Inc. Dust Clearing Tool

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE848779C (de) * 1944-10-03 1952-09-08 Chicago Pneumatic Tool Co Pneumatischer Gesteinsbohrer oder aehnliches Schlagwerkzeug mit einem ringfoermigen,in einem Gehaeuse sich axial hin- und herbewegenden Verteilerventil
FR1431835A (fr) * 1965-01-28 1966-03-18 Montabert Ets Appareil à percussions
FI50390C (fi) * 1973-09-14 1976-03-10 Murskauskone Oy Hydraulisesti käytetty iskulaite
FI50307C (fi) * 1974-04-20 1976-02-10 Xandor Ag Hydraulisesti käytetty iskulaite
FI50941C (fi) * 1974-04-25 1976-09-10 Tampella Oy Ab Paineenalaisen nesteen avulla käytettävä iskulaite.
US4011795A (en) * 1975-03-24 1977-03-15 Schroeder Brothers Corporation Impact tool
FI751895A (ja) * 1975-06-26 1976-12-27 Xandor Ag
US3986567A (en) * 1975-12-08 1976-10-19 Vasily Borisovich Pototsky Hydraulic percussive-rotary machine
ZA763554B (en) * 1976-05-03 1977-09-28 Hydroacoustic Inc Impact tools
BE850812R (fr) * 1976-06-24 1977-05-16 Ingersoll Rand Co Dispositifs d'actionnement hydrauliques
FR2369908A1 (fr) * 1976-11-08 1978-06-02 Montabert Roger Appareil a percussions hydraulique

Also Published As

Publication number Publication date
DE3400302A1 (de) 1985-08-29
FI844848A0 (fi) 1984-12-07
US4635531A (en) 1987-01-13
ZA8523B (en) 1985-11-27
ATE37315T1 (de) 1988-10-15
DE3474120D1 (en) 1988-10-27
JPS60150975A (ja) 1985-08-08
EP0149967A1 (de) 1985-07-31
DE3400302C2 (ja) 1988-01-07
FI844848L (fi) 1985-07-04

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