EP0019568B2 - Schalldämpfer für Drucklufthammer - Google Patents

Schalldämpfer für Drucklufthammer Download PDF

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Publication number
EP0019568B2
EP0019568B2 EP80420060A EP80420060A EP0019568B2 EP 0019568 B2 EP0019568 B2 EP 0019568B2 EP 80420060 A EP80420060 A EP 80420060A EP 80420060 A EP80420060 A EP 80420060A EP 0019568 B2 EP0019568 B2 EP 0019568B2
Authority
EP
European Patent Office
Prior art keywords
cylinder
casing
silencer
rigid
wall
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
EP80420060A
Other languages
English (en)
French (fr)
Other versions
EP0019568B1 (de
EP0019568A1 (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
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=9226058&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0019568(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Montabert SAS filed Critical Montabert SAS
Priority to AT80420060T priority Critical patent/ATE691T1/de
Publication of EP0019568A1 publication Critical patent/EP0019568A1/de
Publication of EP0019568B1 publication Critical patent/EP0019568B1/de
Application granted granted Critical
Publication of EP0019568B2 publication Critical patent/EP0019568B2/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/20—Silencing apparatus characterised by method of silencing by using movable parts having oscillating or vibrating movement
    • 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

Definitions

  • the present invention relates to a pneumatic hammer silencer, of the type comprising a casing surrounding the cylinder and having its apex secured to a sleeve mounted to slide axially on the upper part of the cylinder and suspended elastically on said cylinder, the exhaust of the air coming from the cylinder taking place through an annular passage formed between the outer wall of the cylinder and the inner wall of the envelope.
  • a pneumatic hammer is a device essentially composed of a cylindrical body having a bore inside which is slidably mounted a piston animated by a reciprocating movement, said piston striking a tool such as a pick or chisel to the end of its downhill run.
  • a valve system generally distributes the compressed air alternately in the upper chamber and the lower chamber of the cylinder, thus causing the movement of the piston.
  • the expanded air at a pressure much lower than I bar can then escape from the enclosure at a speed lower than the speed of sound through a duct of reduced section, and this using the entire duration of the complete cycle of the device (see, for example DE-A 2 349 296).
  • the present invention aims to eliminate all the shortcomings of current solutions, its aim being thus to avoid the formation of frost in the exhaust channel at the atmosphere without this causing other drawbacks.
  • the subject of the invention is a silencer for a pneumatic hammer of the kind mentioned in the introduction, in which the envelope delimiting with the external wall of the cylinder an annular enclosure where the air escaping from the cylinder is previously expanded, is constricted at its lower part so as to define an annular exhaust passage of small width, around the outer wall of the cylinder.
  • the invention thus allows the use of an effective expansion enclosure from the point of view of lowering the sound level, without the disadvantage of freezing.
  • the reaction forces of alternating sense and the inertia cause a relative displacement between, on the one hand, the cylinder and, on the other hand, the envelope integral with the sleeve slidably mounted on the cylinder; this relative displacement generates, at the annular exhaust passage of small width formed between the outer wall of the cylinder and the lower edge of the envelope, a continuous abrasion of the frost in formation.
  • the pneumatic hammer shown in the drawing in longitudinal section, comprises in a known manner a cylinder 1 in the bore 2 of which a piston 3 is slidably mounted. The latter strikes a peak 4 which crosses a closing piece 5, closing off the cylinder 1 at its lower part.
  • a conventional valve distribution system causes the admission of compressed air alternately into the cylindrical chamber 6, located above the piston 3, and into the annular chamber 7, located below the piston 3.
  • the latter has a stepped shape, and the lateral surface 8 of its portion of larger diameter masks or discovers, depending on the position of the piston 3, exhaust ports 8 formed radially in the cylinder 1 and opening, on the one hand, in the bore 2, on the other hand, in an annular enclosure 10 surrounding the cylinder 1.
  • the aforementioned enclosure 10 is delimited, externally, by an envelope 11 of generally annular shape, the top of which is integral with a sleeve 12 mounted to slide axially around the upper part of the cylinder 1.
  • the envelope 11, for example made of elastomer, can be fixed to the sleeve 12 by means of a clamp 13.
  • the upper part of the cylinder 1, closed by a cover 14, carries a cylinder head 15 provided with the handle or handles of the device and having a skirt partially surrounding the sleeve 12.
  • the parts located opposite belonging to the sleeve 12 and to the skirt of the cylinder head 15, define with two rings 16 and 17 an annular space, in which is housed and compressed a spring 18, the two ends of which bear on flat rings, respectively 18 and 20
  • the spring 18 thus mounted constitutes an elastic suspension of low stiffness, acting in both directions, for the assembly formed by the casing 11 and the sleeve 12.
  • the envelope 11 is tightened so as to provide, between the outer wall of the cylinder 1 and the lower edge of said envelope 11, an annular passage 21 of small width d over the entire perimeter of the device.
  • the compressed air escaping from the upper chamber 6 or from the lower chamber 7, through the ports 9, is previously relaxed in the annular enclosure 10, delimited by the external wall of the cylinder 1 and the inner wall of the envelope 11. Then this air is evacuated into the atmosphere through the annular passage 21, which constitutes an exhaust duct of determined section and of small width d conducive to maximum attenuation of the exhaust noise.
  • the cylinder 1, subjected to the alternating reactions of the forces developed by the compressed air on the piston 3, moves at the striking frequency of the hammer.
  • the sliding sleeve, on the envelope is also integral with the cylinder head provided with the handle (s) of the device, so that it is the envelope-sleeve assembly which is suspended relative to the air hammer cylinder, unlike the example described where the cylinder head is rigidly linked to the cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Exhaust Silencers (AREA)
  • Earth Drilling (AREA)
  • Surgical Instruments (AREA)
  • Electrostatic Separation (AREA)

Claims (6)

1. Schalldämpfer für Presslufthämmer, der eine Umhüllung (11) enthält, die den Zylinder (1) umgibt und an ihrem oberen Ende fest mit einer Mutte oder Hülse (12) verbunden ist, die in axialer Richtung gleitbar auf dem oberen Bereich des Zylinders (1) sitzt und elastisch am Zylinder aufgehängt ist, wobei das Entweichen der vom Zylinder (1) herkommenden Luft durch einen ringförmigen Durchtritt (21), der zwischen der Aussenwand des Zylinders (1) und der Innenwand der Umhüllung (11) gebildet ist, erfolgt, dadurch gekennzeichnet, daß die Umhüllung (11), die mit der Aussenwand des Zylinders (1) einen Ringraum (10) begrenzt, in dem die aus dem Zylinder (1) entweichende Luft zuerst entspannt wird, an ihrem unteren Bereich verengt ist, so daß ein ringförmiger Ausströmdurchtritt (21) geringer Weite (d) um die Aussenwand des Zylinders (1) herum begrenzt wird.
2. Schalldämpfer nach Anspruch 1, dadurch gekennzeichnet, daß die bewegliche Umhüllung (11) aus einem Elastomer hergestellt ist.
3. Schalldämpfer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die gleitbare, fest mit der Umhüllung (11) verbundene Muffe oder Hülse (12) durch Zwischenschalten mindestens einer Feder (18) elastisch am Zylinder (1) des Presslufthammers aufgehängtist.
4. Schalldämpfer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die gleitbare, fest mit der Umhüllung (11) verbundene Muffe oder Hülse (12) durch Zwischenschalten einer Drucklufteinrichtung elastisch am Zylinder (1) des Presslufthammers aufgehängt ist.
5. Schalldämpfer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die gleitbare, fest mit der Umhüllung (11) verbundene Muffe oder Hülse (12) elastisch an einem Kopfstück (15) aufgehängt ist, das vom oberen Ende des Zylinders (1) des Presslufthammers getragen wird und mit dem oder den Gerätegriff (en) versehen ist.
6. Schalldämpfer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die gleitbare, fest mit der Umhüllung (11) verbundene Muffe oder Hülse (12) ausserdem mit einem Kopfstück fest verbunden ist, das mit dem oder den Gerätegriff(en) versehen ist, wobei die Einheit UmhüllungMuffe oder Hülse Kopfstück elastisch mit Bezug auf den Zylinder des Presslufthammers aufgehängt ist.
EP80420060A 1979-05-22 1980-05-13 Schalldämpfer für Drucklufthammer Expired EP0019568B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80420060T ATE691T1 (de) 1979-05-22 1980-05-13 Schalldaempfer fuer drucklufthammer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7913912A FR2457152A1 (fr) 1979-05-22 1979-05-22 Silencieux pour marteau pneumatique
FR7913912 1979-05-22

Publications (3)

Publication Number Publication Date
EP0019568A1 EP0019568A1 (de) 1980-11-26
EP0019568B1 EP0019568B1 (de) 1982-02-17
EP0019568B2 true EP0019568B2 (de) 1986-01-15

Family

ID=9226058

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80420060A Expired EP0019568B2 (de) 1979-05-22 1980-05-13 Schalldämpfer für Drucklufthammer

Country Status (6)

Country Link
US (1) US4558763A (de)
EP (1) EP0019568B2 (de)
AT (1) ATE691T1 (de)
DE (1) DE3060201D1 (de)
ES (1) ES8101444A1 (de)
FR (1) FR2457152A1 (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE432375B (sv) * 1982-09-16 1984-04-02 Atlas Copco Ab Anordning vid ljuddempare till tryckluftdrivet slagverktyg
US4879847A (en) * 1989-03-13 1989-11-14 Snap-On Tools Corporation Cover for pneumatic tool
DE4110261A1 (de) * 1991-03-28 1992-10-01 Krupp Maschinentechnik Schalldaemmeinrichtung an einem handgefuehrten, fluidbetriebenen schlag- oder bohrwerkzeug
US5259462A (en) * 1992-08-28 1993-11-09 Ingersoll-Rand Company Soft mount air distributor
US5418339A (en) * 1993-11-04 1995-05-23 Minnesota Mining And Manufacturing Company Pneumatic tool having noise reducing muffling structure
JP2003501282A (ja) * 1999-06-10 2003-01-14 マクドナルド、エアー、トゥールズ、リミテッド 空気ツール
US6547015B1 (en) 2001-03-29 2003-04-15 Snap-On Technologies, Inc. Elongated pneumatic tool with replaceable soft grip
US6932166B1 (en) * 2002-12-03 2005-08-23 Paul Kirsch Pneumatic tool
US7478096B2 (en) * 2003-02-26 2009-01-13 Burnside Acquisition, Llc History preservation in a computer storage system
US7261181B2 (en) * 2004-06-03 2007-08-28 Caterpillar Inc. Detatchable muffler apparatus for pneumatic tools
DE102004031628A1 (de) * 2004-06-30 2006-02-02 Robert Bosch Gmbh Vorrichtung mit einer Innenschale und einer Außenschale eines Gehäuses einer Handwerkzeugmaschine
TWM268150U (en) * 2004-08-17 2005-06-21 Guo-Rung Liu Impact cylinder for reciprocal type pneumatic tool
US7681690B2 (en) * 2007-07-13 2010-03-23 Longyear Tm, Inc. Noise abatement device for a pneumatic tool
US8196674B2 (en) * 2008-03-05 2012-06-12 Makita Corporation Impact tool
US7735603B2 (en) * 2008-05-28 2010-06-15 Longyear Tm, Inc. Noise reducing device for a pneumatic tool
US8215449B2 (en) * 2009-12-02 2012-07-10 Longyear Tm, Inc. Muffler system for noise abatement and ice control

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1644030A (en) * 1926-08-04 1927-10-04 Ingersoll Rand Co Handle for rock drills
US2058583A (en) * 1935-12-23 1936-10-27 Independent Pneumatic Tool Co Cushioned handle for tools
US2830560A (en) * 1955-10-05 1958-04-15 Doeden Tool Corp Air-operated hand tool
US2899934A (en) * 1956-01-19 1959-08-18 salengro
FR1353634A (fr) * 1963-01-18 1964-02-28 Meudon Forges Atel équipement anti-bruit pour marteau pneumatique
BE649108A (de) * 1963-06-10
FR1416101A (fr) * 1964-11-19 1965-10-29 Cons Mining & Smelting Co Silencieux pour outils pneumatiques percutants
US3526293A (en) * 1968-06-13 1970-09-01 Gardner Denver Co Muffler for fluid actuated tool
US3554316A (en) * 1969-11-25 1971-01-12 Chicago Pneumatic Tool Co Detachable elastomer muffler for pneumatic percussive tools
SU482286A1 (ru) * 1972-10-03 1975-08-30 Институт Горного Дела Ан Ссср Пневматический бетонолом
US3809179A (en) * 1973-04-18 1974-05-07 Dresser Ind Exhaust muffler for pneumatic tools
FR2282974A1 (fr) * 1974-08-29 1976-03-26 Baud Barthelemy Soufflet anti-bruit, notamment pour pistolets pneumatiques
US4079809A (en) * 1977-07-13 1978-03-21 The United States Of America As Represented By The Secretary Of The Interior Muffler for pneumatic drill
DE2827279C2 (de) * 1978-06-21 1986-06-12 Signode Corp., Glenview, Ill. Abluftschalldämpfer für tragbare pneumatische Eintreibgeräte

Also Published As

Publication number Publication date
US4558763A (en) 1985-12-17
EP0019568B1 (de) 1982-02-17
DE3060201D1 (en) 1982-03-25
ES491591A0 (es) 1980-12-16
ATE691T1 (de) 1982-03-15
FR2457152A1 (fr) 1980-12-19
ES8101444A1 (es) 1980-12-16
FR2457152B1 (de) 1982-07-09
EP0019568A1 (de) 1980-11-26

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