EP0071546B1 - Dichteinrichtungen für Schlagmaschinen zwischen hydraulischem und äusserem Medium - Google Patents

Dichteinrichtungen für Schlagmaschinen zwischen hydraulischem und äusserem Medium Download PDF

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Publication number
EP0071546B1
EP0071546B1 EP82420092A EP82420092A EP0071546B1 EP 0071546 B1 EP0071546 B1 EP 0071546B1 EP 82420092 A EP82420092 A EP 82420092A EP 82420092 A EP82420092 A EP 82420092A EP 0071546 B1 EP0071546 B1 EP 0071546B1
Authority
EP
European Patent Office
Prior art keywords
chamber
buffer chamber
hydraulic fluid
fluid
communicates
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
EP82420092A
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English (en)
French (fr)
Other versions
EP0071546A1 (de
Inventor
Roger Montabert
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.)
Montabert SAS
Original Assignee
Montabert SAS
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Filing date
Publication date
Application filed by Montabert SAS filed Critical Montabert SAS
Priority to AT82420092T priority Critical patent/ATE8854T1/de
Publication of EP0071546A1 publication Critical patent/EP0071546A1/de
Application granted granted Critical
Publication of EP0071546B1 publication Critical patent/EP0071546B1/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
    • B25D9/06—Means for driving the impulse member
    • B25D9/12—Means for driving the impulse member comprising a built-in liquid motor, i.e. the tool being driven by hydraulic pressure
    • 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
    • B25D9/04—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously of the hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member

Definitions

  • the present invention relates to a percussion device driven by an incompressible fluid under pressure, such as a hydraulic fluid.
  • This device has the general structure shown in FIG. 1 of the attached schematic drawing. It comprises a striking striking mass (2) in the form of a piston providing a succession of percussions on a tool (3).
  • the displacement of the piston (2) is obtained by placing in communication a chamber (4) located above the piston, alternately with a high pressure circuit and with a low pressure circuit.
  • An annular chamber (5) of small surface and antagonistic to the chamber (4) is maintained either constantly or alternatively in relation to the high pressure circuit, so that the result of the hydraulic forces is exerted alternately in one direction and in the other.
  • the chamber (5) formed in the cylinder (1) of the body of the device is generally separated from the external environment by a cylindrical surface (6) serving to guide the piston (2), then by a chamber (7) serving to collect the inevitable leaks of hydraulic fluid passing through the play existing between the piston (2) and the bearing (6), a sealing system (8) being provided beyond the chamber (7), comprising one or more seals d sealing.
  • the hydraulic fluid recovery chamber (7) is usually connected to the device's drainage circuit (9) which is itself connected either to the device's low pressure circuit (10) or to a circuit. exterior (12) independent of drainage.
  • the annular clearance existing between the cylindrical seat (6) and the piston (2) is constantly filled with fluid coming from the chamber (5), the pressure of the fluid varying progressively from the high pressure near the chamber (5), to the pressure of the drainage circuit near the chamber (7).
  • the object of the invention is to significantly reduce or even eliminate the pressure waves in the chamber (7) and in the drainage circuit.
  • the hydraulic fluid recovery chamber is associated with a buffer chamber delimited at least partially by a deformable wall and containing a fluid compressible under low pressure.
  • This buffer chamber is capable, upon impact of the piston, of rapidly deforming under the effect of pressure and, as a result, of releasing a certain volume for the fluid repelled by the piston upon impact, avoiding thus a significant increase in the pressure of the hydraulic fluid in the recovery chamber thereof.
  • the fluid flows slowly through the drainage circuit, pushed back by the deformable wall of the buffer chamber which returns to its initial shape.
  • the buffer chamber is arranged inside the hydraulic fluid recovery chamber.
  • the buffer chamber is housed in a cavity which, formed in the body of the device, communicates with the hydraulic fluid recovery chamber by at least one wide section channel.
  • the buffer chamber is housed outside the body of the device and communicates with the hydraulic fluid recovery chamber by at least one wide section channel.
  • the buffer chamber can either be arranged laterally or be annular.
  • the buffer chamber is either sealed and filled with a gas under low pressure, or filled with air, and brought to atmospheric pressure by communication with the outside.
  • an element (13) in which are fixed the two edges of a membrane (14) delimiting with the element (13) an annular chamber (15) .
  • Figs. 2 and 3 show three possibilities of mounting the membrane (14) on elements (13) having different respective shapes.
  • One of the buffer chambers (15) shown in FIG. 3 is constituted by a tubular membrane (16).
  • the buffer chamber (15) can either be formed in a leaktight manner and contain a compressible gas under low pressure, or be filled with air and communicate with the outside, for example by a channel (17), shown in dotted lines in the drawing.
  • an element (18) is fixed in the chamber (7), which provides a cavity (19) in which the buffer chamber (20) is mounted.
  • the buffer chamber can be constituted either by a tubular hose (22), or by a membrane (23), the two edges of which are fixed in the element (18).
  • the communication of the cavity (19) containing the chamber (20) with the chamber (7) is done either by channels (24) formed in the body of the device, or by channels (25) formed in the element (18).
  • Fig. 5 shows a third type of buffer chamber according to which the buffer chamber (26) is arranged laterally to the device, and formed outside of it in the left part and inside of it in the part right.
  • This chamber (26) is separated by a membrane (27) from a chamber (28) communicating with the fluid recovery chamber (7) by a wide section channel (29).
  • the latter may or may not communicate with the outside via a channel (30).
  • the membrane delimiting, at least partially, the buffer chamber will deform in a direction of reduction of the volume of the buffer chamber, thus increasing the volume available for the fluid hydraulic in the chamber (7) and avoiding an excessively sudden increase in pressure inside this chamber.
  • the fluid flows slowly through the drainage circuit (9) or (12), pushed back by the deformable membrane of the buffer chamber, which returns to its initial shape.
  • the drainage circuit (9) is connected to the low pressure circuit (10) of the apparatus, there is provided, on the drainage circuit (9), a non-return valve (32), so that that the fluid cannot pass from the low pressure circuit (10) to the chamber (7) for recovering hydraulic fluid.
  • this chamber is isolated from pressure fluctuations existing in the low pressure circuit, the valve (32) opening when the pressure in the low pressure circuit is lower than that in the chamber (7), allowing the evacuation of the excess fluid stored during the deformation of the buffer chamber.
  • the invention brings a great improvement to the existing technique by providing a device of simple design ensuring the maintenance of the drainage circuit of the device under a fluid pressure whose fluctuations are modest, thus saving at the seals and the sealing system of the device, rapid destruction.

Landscapes

  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Pipe Accessories (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Electroluminescent Light Sources (AREA)
  • Sealing Devices (AREA)
  • General Details Of Gearings (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Claims (9)

1. Mit inkompressiblem Druckfluid betriebene Schlagmaschine, die einen aufeinanderfolgend Schläge auf ein Werkzeug (3) ausübenden Kolben (2) enthält, der durch Verbinden einer oberhalb von ihm angeordneten Kammer (4) alternativ mit einem Hochdruckkreis und mit einem Niederdruckkreis verlagert wird, wobei eine der Kammer (4) entgegenwirkende Ringkammer (5) geringer Oberfläche vorgesehen ist, die entweder konstant oder alternativ mit dem Hochdruckkreis verbunden und vom äußeren Medium durch einen zylindrischen, den Kolben führenden Bereich (6), eine Kammer (7) zum Sammeln der Verluste des Hydraulikfluids und eine Dichteinrichtung (8) getrennt ist, dadurch gekennzeichnet, daß der Kammer (7) zum Sammeln des Hydraulikfluids eine Pufferkammer (15) zugeordnet ist, die mindestens teilweise durch eine deformierbare Wand (14) begrenzt ist und ein unter geringem Druck kompressibles Fluid enthält.
2. Maschine nach Anspruch 1, dadurch gekennzeichnet, daß die Pufferkammer (15) im Inneren der Kammer (7) zum Sammeln des Hydraulikfluids angeordnet ist.
3. Maschine nach Anspruch 1, dadurch gekennzeichnet, daß die Pufferkammer (20) in einer im Maschinenkörper angeordneten Ausnehmung (19) untergebracht ist, die mit der Kammer (7) zum Sammeln des Hydraulikfluids dur.ch mindestens einen Kanal (24, 25) weiten Querschnitts verbunden ist.
4. Maschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Pufferkammer (15, 20) ringförmig ist.
5. Maschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Pufferkammer (26) seitlich am Gerät angeordnet ist.
6. Maschine nach Anspruch 5, dadurch gekennzeichnet, daß die Pufferkammer (26) außen am Maschinenkörper angeordnet ist und mit der Kammer (7) zum Sammeln des Hydraulikfluids durch mindestens einen Kanal (29) weiten Querschnitts verbunden ist.
7. Maschine nach Anspruch 5, dadurch gekennzeichnet, daß die Pufferkammer (26) im Inneren des Maschinenkörpers untergebracht ist und mit der Kammer (7) zum Sammeln des Hydraulikfluids durch mindestens einen Kanal (29) weiten Querschnitts verbunden ist.
8. Maschine nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Pufferkammer (15, 20, 26) dicht geschlossen und mit einem unter niedrigem Druck stehenden Gas gefüllt ist.
9. Maschine nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Pufferkammer (15, 20, 26) mit Luft gefüllt ist und mit dem äußeren Medium in Verbindung steht.
EP82420092A 1981-07-17 1982-07-06 Dichteinrichtungen für Schlagmaschinen zwischen hydraulischem und äusserem Medium Expired EP0071546B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82420092T ATE8854T1 (de) 1981-07-17 1982-07-06 Dichteinrichtungen fuer schlagmaschinen zwischen hydraulischem und aeusserem medium.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8114304A FR2509652A1 (fr) 1981-07-17 1981-07-17 Perfectionnement au systeme d'etancheite entre le milieu hydraulique et le milieu exterieur d'un appareil a percussions
FR8114304 1981-07-17

Publications (2)

Publication Number Publication Date
EP0071546A1 EP0071546A1 (de) 1983-02-09
EP0071546B1 true EP0071546B1 (de) 1984-08-08

Family

ID=9260776

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82420092A Expired EP0071546B1 (de) 1981-07-17 1982-07-06 Dichteinrichtungen für Schlagmaschinen zwischen hydraulischem und äusserem Medium

Country Status (12)

Country Link
US (1) US4508017A (de)
EP (1) EP0071546B1 (de)
JP (1) JPS599315B2 (de)
AT (1) ATE8854T1 (de)
AU (1) AU536362B2 (de)
CA (1) CA1200734A (de)
DE (2) DE3260542D1 (de)
ES (1) ES8304467A1 (de)
FI (1) FI822338L (de)
FR (1) FR2509652A1 (de)
NO (1) NO151110C (de)
ZA (1) ZA825105B (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3330670A1 (de) * 1983-08-25 1985-03-14 J. und H. Büter Maschinenfabrik GmbH, 4472 Haren Doppeltwirkende kolben-zylinder-einheit
FR2595972B2 (fr) * 1985-07-16 1989-10-20 Montabert Ets Appareil a percussions
JPH0810291B2 (ja) * 1988-03-09 1996-01-31 株式会社日立製作所 太陽光採光システム
JPH0571811U (ja) * 1993-02-04 1993-09-28 株式会社フジタ 太陽光集光伝送装置
KR100260308B1 (ko) * 1997-06-11 2000-07-01 최해성 개선된 실링을 갖는 유압헤머
US6058632A (en) * 1997-11-07 2000-05-09 Hawkins; Peter Arthur Taylor Tool holder with percussion member
FI106618B (fi) * 1998-03-30 2001-03-15 Sandvik Tamrock Oy Sovitelma painenestekäyttöisen iskulaitteen, kuten esimerkiksi rikotuslaitteen yhteydessä
FI110804B (fi) * 2000-06-27 2003-03-31 Sandvik Tamrock Oy Menetelmä porauskomponenttien liitosten avaamiseksi ja kallioporakone
JP2009297847A (ja) * 2008-06-16 2009-12-24 Yokota Kogyo Kk 衝撃式締付工具
JP5386704B2 (ja) * 2008-06-16 2014-01-15 ヨコタ工業株式会社 衝撃式締付工具
SE534794C2 (sv) * 2010-04-01 2011-12-27 Atlas Copco Rock Drills Ab Hydraulisk slående anordning, kolvstyrning, samt borrigg
CN103452158A (zh) * 2012-05-30 2013-12-18 株式会社水山重工业 液压破碎锤的气缸液压损失防止装置
SE536562C2 (sv) * 2012-06-28 2014-02-25 Atlas Copco Rock Drills Ab Anordning och förfarande vid en hydraulisk bergborrmaskin jämte bergborrmaskin
JP5528527B2 (ja) * 2012-11-22 2014-06-25 スサン重工業株式会社 油圧ブレーカーのピストン接触面強制潤滑装置
EP3100828B1 (de) 2014-01-31 2021-09-22 Furukawa Rock Drill Co., Ltd. Hydraulische hammervorrichtung
FR3057483B1 (fr) * 2016-10-14 2019-04-19 Montabert Appareil a percussions pourvu d’un palier de guidage equipe d’un dispositif de centrage

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1962168A (en) * 1930-07-30 1934-06-12 Smith Corp A O Lined pressure vessel
US2808070A (en) * 1955-04-29 1957-10-01 Malsbary Mfg Company Cushion dome
FR1431835A (fr) * 1965-01-28 1966-03-18 Montabert Ets Appareil à percussions
GB1142324A (en) * 1965-05-10 1969-02-05 Angus George Co Ltd Improvements in or relating to pressure-fluid-operated devices
DE1901776C3 (de) * 1969-01-15 1980-04-17 Ermeto Armaturen Gmbh, 4800 Bielefeld Vorrichtung zum selbsttätigen Entlüften von Hydraulikanlagen
CA941264A (en) * 1970-04-03 1974-02-05 Etablissements Montabert Dispositif de commande du distributeur d'un appareil a percussions mu par un liquide sous pression
FR2220700B1 (de) * 1973-03-08 1976-09-10 Poclain Sa
FI50941C (fi) * 1974-04-25 1976-09-10 Tampella Oy Ab Paineenalaisen nesteen avulla käytettävä iskulaite.
SE392830B (sv) * 1975-03-18 1977-04-25 Atlas Copco Ab Anordning vid bergborrmaskiner for dempning av rekylen fran ett till maskinen anslutet arbetsverktyg
US3972396A (en) * 1975-06-05 1976-08-03 United Technologies Corporation Leakage detector with back pressure sensor
FR2355617A1 (fr) * 1975-12-18 1978-01-20 Montabert Roger Machine de percussion
DE2738956B2 (de) * 1977-08-30 1979-11-29 Frank 3380 Goslar Habsick Bohrgestänge-Vorspanneinrichtung für Drehschlagbohrmaschinen

Also Published As

Publication number Publication date
FR2509652B1 (de) 1984-04-20
DE3260542D1 (en) 1984-09-13
NO822475L (no) 1983-01-18
ES513726A0 (es) 1983-03-16
AU536362B2 (en) 1984-05-03
ZA825105B (en) 1983-04-27
FR2509652A1 (fr) 1983-01-21
JPS5871082A (ja) 1983-04-27
NO151110C (no) 1985-02-13
ES8304467A1 (es) 1983-03-16
JPS599315B2 (ja) 1984-03-01
EP0071546A1 (de) 1983-02-09
NO151110B (no) 1984-11-05
DE71546T1 (de) 1983-06-23
FI822338L (fi) 1983-01-18
CA1200734A (fr) 1986-02-18
US4508017A (en) 1985-04-02
FI822338A0 (fi) 1982-06-30
ATE8854T1 (de) 1984-08-15
AU8609682A (en) 1983-07-28

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