EP0147262B1 - Schalldämpfendes Gehäuse für pneumatische Bohrhämmer - Google Patents

Schalldämpfendes Gehäuse für pneumatische Bohrhämmer Download PDF

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Publication number
EP0147262B1
EP0147262B1 EP84402259A EP84402259A EP0147262B1 EP 0147262 B1 EP0147262 B1 EP 0147262B1 EP 84402259 A EP84402259 A EP 84402259A EP 84402259 A EP84402259 A EP 84402259A EP 0147262 B1 EP0147262 B1 EP 0147262B1
Authority
EP
European Patent Office
Prior art keywords
hammer
housing
exhaust orifice
chamber
exhaust
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
EP84402259A
Other languages
English (en)
French (fr)
Other versions
EP0147262A1 (de
Inventor
Frédéric Etienne Marcel
François Jean Marie Maume
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.)
Charbonnages de France CDF
Original Assignee
Charbonnages de France CDF
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 Charbonnages de France CDF filed Critical Charbonnages de France CDF
Priority to AT84402259T priority Critical patent/ATE34933T1/de
Publication of EP0147262A1 publication Critical patent/EP0147262A1/de
Application granted granted Critical
Publication of EP0147262B1 publication Critical patent/EP0147262B1/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
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/11—Arrangements of noise-damping means
    • B25D17/12—Arrangements of noise-damping means of exhaust silencers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/11—Arrangements of noise-damping means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • F02B77/13—Acoustic insulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S173/00—Tool driving or impacting
    • Y10S173/02—Sound muffling

Definitions

  • the subject of the invention is a soundproofing cover intended to contain a pneumatic hammer in order to attenuate the noise produced by the latter and mainly the noise caused at the exhaust by the expansion of the air which leaves this hammer.
  • the cover of the invention is especially useful for the soundproofing of pneumatic hammers of the rotary hammer type installed on a drilling jumbo in mines and in quarries.
  • the main sources of noise are the exhaust of air, the foil and the body of the air hammer.
  • the total sound energy emitted by the hammer (by the body and by the exhaust of air) varies from 35% to 90% of the total global energy radiated depending on whether it is a light or heavy hammer and that the foil is itself weak or of large transverse dimension. It is therefore particularly important to reduce the noise emitted by the hammer.
  • the front wall of the casing has an opening for the exit to the atmosphere of the air which comes from the exhaust orifice provided on the hammer. Air circulates freely between this last orifice and the opening through which it escapes to the open air.
  • Document EP-A-0 009 229 also discloses a casing containing a pneumatic hammer and formed by two shells joining together with one another around the body of the hammer; this casing has internal transverse partitions which limit with the body of the hammer four successive annular chambers in the longitudinal direction of the hammer, communicating by holes provided in these partitions.
  • the hammer exhaust air enters a first extreme chamber and it propagates through the following chambers in the same direction to the last opposite extreme chamber which is placed in communication with the atmosphere.
  • the main object of the invention is to provide a casing for the soundproofing of a pneumatic hammer whose efficiency is improved.
  • a casing for an air hammer having on one of its sides an air exhaust orifice, composed of assemblable and dismountable parts internally comprising a sound absorbing material, having through its wall an air outlet opening exhaust and limiting with the hammer an internal volume of which at least a fraction is divided by internal partitions in the longitudinal direction of the hammer into several communicating chambers, is characterized according to the invention by the fact that the exhaust port of the hammer s opens in a first chamber located in the middle part of the length of the hammer and the exhaust air outlet opening is in a last chamber determining a return of this air in the opposite direction along the hammer, in an area not containing the exhaust port.
  • the interior volume is divided by two transverse partitions into three chambers between the exhaust orifice and the outlet opening.
  • the casing plays the role of a pot of successive expansion of the air, like an exhaust in addition to its role of soundproofing hood.
  • a first expansion chamber is created by means of two partitions transverse to the body of the hammer, these partitions being arranged on the side and other of the exhaust port in the longitudinal direction of the hammer; one of these partitions is perforated with several exhaust holes.
  • the air enters a second expansion chamber then borrows a communication passage with reduced cross section on the side of the hammer opposite to that where the exhaust orifice is located, to reach a third expansion chamber in which opens the air outlet opening.
  • the partitions are directly in contact with the body of the hammer and they are in contact on the side of the casing with the absorbent material which is part of the latter.
  • the absorbent material is advantageously a polyurethane foam burnt on the surface so that, the surface pores being thus closed, it has a closed continuous surface;
  • the metal part of the casing is a composite sheet, commercially available comprising a first external steel sheet, a damping material, a second internal steel sheet.
  • a pneumatic hammer 1 has an orifice 2 for supplying compressed air and an orifice 3 for exhausting the air used.
  • the relative position of these orifices 2 and 3 on the hammer can be different depending on the manufacturer; the invention is easily adaptable to any position of these orifices.
  • a casing according to the invention is made in three parts; a sole 4 is intended to be fixed to the movement carriage on which the hammer rests during use. On this sole 4 is disposed in turn the hammer 1 by its own sole 1A.
  • a housing body 5 almost entirely contains the hammer 1.
  • a cover 6 is fixed to the body 5 of the housing.
  • the cover 6 and the body 5 are joined in a joint plane using two corresponding perimeter flanges 7, 8 pierced with holes for the passage of bolts.
  • the parting line has a step such that it descends closer to the sole 4 in the front part of the hammer 1 so that this part, where the drill bit is put in place (not shown), is more accessible after removal of the cover 6.
  • the sole 4, the body 5 and the cover 6 are made of a composite sheet coated on its entire inner surface, after making the casing, with an acoustically absorbent material 9.
  • Any suitable absorbent material can be used.
  • the interior absorbent material 9 is a rather firm, open-pore, commercially available polyurethane foam, the exposed surface of which has been burnt so that it becomes continuous, relatively smooth and resists penetration. fats.
  • the composite sheet comprises a first outer steel sheet with a thickness of 3.5 mm, a damping material with a thickness of 0.5 mm and an inner steel sheet with a thickness of 1 mm.
  • the wall of the casing 1 has a thickness of 30 mm, ie 5 mm for the composite sheet and 25 mm for the interior absorbent material 9.
  • Such a casing is effective because of its heterogeneous constitution; however, the composite sheet could be replaced by a heterogeneous synthetic material produced otherwise, for example using a moldable synthetic material loaded with fibers.
  • This internal volume 10 is divided into several successive expansion chambers communicating.
  • this opening 12 straddles the joint plane of the body 5 and the cover 6, which is not shown in the schematic representation of FIGS. 3 and 4.
  • the latter better show the three chambers 11A, 11B, 11C.
  • These are produced by means of two partitions 13A, 13B transverse to the hammer 1 which divide the internal volume 10 into three chambers in the longitudinal direction of the hammer, in an area which leads from the exhaust orifice 3 to the opening outlet 12.
  • the first chamber 11A is located in the central region of the hammer in the longitudinal direction and it contains the exhaust orifice 3.
  • the partition 13A is pierced with several holes 14 which make the 1st chamber 11A and the 2nd chamber 11B communicate.
  • partitions 13A and 13B are located on the upper side of the hammer 1 where the exhaust orifice 3 is located; they completely or almost completely cut, in a transverse direction, the internal volume 10 but there remain on the opposite side or lower side of the hammer 1, between its sole 1A and its body, two symmetrical passages 15 of relatively small section and which one could partially block if necessary, which connect the second chamber 11 B with the third chamber 11 C.
  • the partitions 13A, 13B can be produced in many equivalent ways; they can be an integral part of the casing, for example of the cover 6, and come into contact with the external surface of the hammer. They can also be fixed to the surface of the hammer so that the casing comes to bear against their edge by its internal surface or more exactly by the internal surface of the insulating material 9 which forms part of it. In the example described here, another variant has been produced.
  • the partitions 13A, 13B are the two end walls in the longitudinal direction of a box 13 better visible in FIG. 1, inverted on the upper face of the hammer, to which it is fixed, to contain the exhaust orifice 3. This box 13 has a flat bottom 13C against which the internal face of the absorbent material 9 which is part of the cover 6 bears.
  • the casing has, for the passage of a connection pipe, an opening 16 which is also preferably astride the joint plane between the body 5 and the cover 6.
  • the partitions 13A, 13B are shaped and arranged as a function of the relative situation of the supply orifice 2 and the exhaust orifice 3 so as to provide the desired expansion chambers between the latter and an outlet opening 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Pipe Accessories (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Claims (6)

1. Gehäuse für einen pneumatischen Hammer mit einer Abluftöffnung (3) an einer seiner Seiten, das aus zusammenfügbaren und demontierbaren Teilen (4, 5, 6) besteht und innen ein schallabsorbierendes Material (9) aufweist, das eine seine Gehäusewand durchsetzende Ausgangsöffnung (12) für die Abluft enthält und das mit dem Hammer (1) ein inneres Volumen (10) einschließt, von dem mindestens ein Teil durch innere Trennwände (13A, 13B) in Längsrichtung des Hammers in mehrere miteinander verbundene Kammern (11A, 11 B, 11C) unterteilt ist, dadurch gekennzeichnet, daß die Abluftöffnung (3) in eine erste Kammer (11A) führt, die sich in einem mittleren Längenbereich des Hammers befindet, und daß sich die Ausgangsöffnung (12) für die Abluft in einer letzten Kammer (11C) befindet, wodurch ein Zurückströmen der Abluft in der entgegengesetzten Richtung entlang dem Hammer in einen Bereich bewirkt wird, der nicht die Abluftöffnung (3) enthält.
2. Gehäuse nach Anspruch 1, dadurch gekennzeichnet, daß das innere Volumen (10) durch zwei quer angeordnete Trennwände (13A, 13B) in drei Kammern (11A, 11 B, 11C) zwischen der Abluftöffnung (3) und der Ausgangsöffnung (12) für die Abluft unterteilt ist.
3. Gehäuse nach Anspruch 2, dadurch gekennzeichnet, daß die quer gerichteten Trennwände (13A, 13B) auf der Seite des Hammers (1), an der sich die Abluftöffnung (3) befindet, beiderseitig der letzteren angeordnet sind, und daß die Verbindung zwischen der letzten Kammer (11 C) und der ihr vorgeordneten Kammer (11 B) auf der entgegengesetzten Seite des Hammers (1) aus mindestens einer Durchführung (15) zwischen dem Gehäuse (5, 6) und dem Hammer (1) besteht.
4. Gehäuse nach Anspruch 3, dadurch gekennzeichnet, daß die quer stehende Trennwand (13A), die dem Vorderteil des Hammers (1) am nächsten ist, mehrere Durchbohrungen (14) aufweist, welche die Kommunikation mit der nachfolgenden Kammer (11 B) sicherstellen.
5. Gehäuse nach Anspruch 4, dadurch gekennzeichnet, daß das innere Volumen (10) auf der Seite des Hammers (1), auf der sich die Abluftöffnung (3) befindet in drei Kammern (11A, 11 B, 11C) mittels eines Kastens (13) unterteilt ist, der zur Oberfläche des Hammers (1) hin umgedreht ist, um die Abluftöffnung (3) aufzunehmen, wobei dieser Kasten (13) einen ebenen Boden (13C) hat, an dem die Innenfläche des inneren isolierenden Materials (9) des Gehäuses anliegt.
6. Gehäuse nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß es aus einem Verbundblech hergestellt ist, welches aus einem ersten Stahlblech, einer Dämpfungsschicht, einem zweiten Stahlblech und einer inneren Schicht (9) aus einem schallabsorbierenden Material besteht.
EP84402259A 1983-11-10 1984-11-09 Schalldämpfendes Gehäuse für pneumatische Bohrhämmer Expired EP0147262B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84402259T ATE34933T1 (de) 1983-11-10 1984-11-09 Schalldaempfendes gehaeuse fuer pneumatische bohrhaemmer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8317900A FR2554752B1 (fr) 1983-11-10 1983-11-10 Carter insonorisant pour marteau pneumatique de foration
FR8317900 1983-11-10

Publications (2)

Publication Number Publication Date
EP0147262A1 EP0147262A1 (de) 1985-07-03
EP0147262B1 true EP0147262B1 (de) 1988-06-08

Family

ID=9293991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84402259A Expired EP0147262B1 (de) 1983-11-10 1984-11-09 Schalldämpfendes Gehäuse für pneumatische Bohrhämmer

Country Status (9)

Country Link
US (1) US4624339A (de)
EP (1) EP0147262B1 (de)
JP (1) JPS60173288A (de)
AT (1) ATE34933T1 (de)
AU (1) AU562897B2 (de)
DE (1) DE3471897D1 (de)
ES (1) ES291672Y (de)
FR (1) FR2554752B1 (de)
ZA (1) ZA848781B (de)

Families Citing this family (20)

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Publication number Priority date Publication date Assignee Title
FI90400C (fi) * 1990-05-23 1994-02-10 Bretec Oy Hydraulinen iskuvasara
US5419404A (en) * 1990-05-23 1995-05-30 Bretec Oy Hydraulic impact hammer
US5272285A (en) * 1992-08-20 1993-12-21 Scott Mfg., Inc. Sound attenuating machinery cover
DE4423166A1 (de) * 1994-07-04 1996-01-11 Krupp Maschinentechnik Hydraulikhammer mit Bedüsungsanordnung zur Staubbindung
US6067409A (en) * 1996-06-28 2000-05-23 Lsi Logic Corporation Advanced modular cell placement system
EP0935058A3 (de) * 1998-02-06 2000-09-06 Isuzu Ceramics Research Institute Co., Ltd. Kühler und Maschinenlärmschutzumhüllung
FI108561B (fi) * 1998-09-29 2002-02-15 Tamrock Oy Kotelo kallionporauslaitteen äänen eristämiseksi ja sovitelma kallionporauslaitteen yhteydessä
KR200207572Y1 (ko) * 1998-12-04 2001-01-15 이원해 유압식 착암기의 방음 방진 장치
US6220369B1 (en) * 2000-09-20 2001-04-24 Hey Yeh Scrap removing and tool cooling device for a front holding end of a tool spindle of a machine tool
JP3740694B2 (ja) * 2002-02-22 2006-02-01 日立工機株式会社 電動工具
US20070246237A1 (en) * 2006-04-24 2007-10-25 Emile Homsi Vibration dampening of a power tool
US7681690B2 (en) * 2007-07-13 2010-03-23 Longyear Tm, Inc. Noise abatement device for a pneumatic tool
DE102008063113A1 (de) * 2008-01-09 2009-07-16 Marquardt Gmbh Elektrowerkzeug
FR2927010B1 (fr) 2008-01-31 2010-06-11 Sullair Europ Dispositif de marteau piqueur a air comprime
EP2105261A1 (de) * 2008-03-27 2009-09-30 AEG Electric Tools GmbH Elektrowerkzeug, insbesondere Bohr- und/oder Meißelhammer
US7735603B2 (en) * 2008-05-28 2010-06-15 Longyear Tm, Inc. Noise reducing device for a pneumatic tool
WO2010150185A1 (en) * 2009-06-23 2010-12-29 Compair (Sa) (Pty) Ltd Muffler for pneumatic rock drill
US8215449B2 (en) * 2009-12-02 2012-07-10 Longyear Tm, Inc. Muffler system for noise abatement and ice control
US9153225B2 (en) 2011-12-16 2015-10-06 Emerson Climate Technologies, Inc. Sound enclosure for enclosing a compressor assembly
EP3113905B1 (de) * 2014-03-03 2019-04-24 Noretud Industries Dichtungspositionierungsvorrichtung und ihre verwendung

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US2789653A (en) * 1954-05-17 1957-04-23 Fannen John Muffler attachment for air driven tools of the impact type
US3255844A (en) * 1964-01-16 1966-06-14 Gardner Denver Co Multi-passage silencer for pneumatic tool
FR1401587A (fr) * 1964-06-09 1965-06-04 Silencieux pour outils actionnés par un moteur à air comprimé
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IT8104805U1 (it) * 1981-03-31 1982-10-01 Panda Srl Silenziatore di scarico in particolare per pistole e attrezzature pneumatiche

Also Published As

Publication number Publication date
JPS60173288A (ja) 1985-09-06
AU562897B2 (en) 1987-06-18
ZA848781B (en) 1985-07-31
FR2554752A1 (fr) 1985-05-17
DE3471897D1 (en) 1988-07-14
ES291672Y (es) 1987-01-16
ES291672U (es) 1986-05-01
AU3529784A (en) 1985-05-16
FR2554752B1 (fr) 1986-12-26
US4624339A (en) 1986-11-25
EP0147262A1 (de) 1985-07-03
ATE34933T1 (de) 1988-06-15

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