EP0166681B1 - Marteau penumatique - Google Patents

Marteau penumatique Download PDF

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Publication number
EP0166681B1
EP0166681B1 EP85810187A EP85810187A EP0166681B1 EP 0166681 B1 EP0166681 B1 EP 0166681B1 EP 85810187 A EP85810187 A EP 85810187A EP 85810187 A EP85810187 A EP 85810187A EP 0166681 B1 EP0166681 B1 EP 0166681B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
chamber
housing
chambers
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
EP85810187A
Other languages
German (de)
English (en)
Other versions
EP0166681A1 (fr
Inventor
Heinz Steiner
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.)
Schweizerische Industrie Gesellschaft
Original Assignee
Schweizerische Industrie Gesellschaft
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 Schweizerische Industrie Gesellschaft filed Critical Schweizerische Industrie Gesellschaft
Priority to AT85810187T priority Critical patent/ATE38008T1/de
Publication of EP0166681A1 publication Critical patent/EP0166681A1/fr
Application granted granted Critical
Publication of EP0166681B1 publication Critical patent/EP0166681B1/fr
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
    • 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 present invention relates to a pneumatically operated hammer according to the preamble of independent claim 1.
  • Such a pneumatic hammer is known for example from EP-PS 0 015 700.
  • a further tool is described in US Pat. No. 2,128,742, in which an outer body made of insulating material is molded onto a metal cylinder.
  • a casing in the form of a tube surrounds the middle part of the cylinder and forms together with the cylinder an expansion chamber for receiving the fluid from the outlet opening of the cylinder.
  • Ring plates are located at the ends of the expansion chamber.
  • a plurality of axial partitions are arranged in a step shape around the cylinder, in that one of the two partitions on both sides of the outlet opening is at a distance from the lower ring plate at the bottom and the other from the upper ring plate at the top.
  • Two further partitions are then also arranged in a staggered manner, and the exiting fluid has to cover two long paths to the exhaust in the casing, which is said to have a damping effect.
  • the pneumatically operated hammer described in the aforementioned EP-PS 15 700 which corresponds to US Pat. Nos. 4,303,131 and 4,303,133, has a cylinder tube with a reciprocating piston. Flow channels for the supply of fluid to the lower cylinder space are located in radial longitudinal ribs.
  • the upper cylinder chamber is fed directly from the flutter valve.
  • a cylindrical silencer tube surrounds the cylinder, which is encased in the molded body, along its entire length, including the anvil and the tool holder.
  • a silencer chamber is formed between this silencer tube and the molded body and is connected to the surroundings by openings.
  • three ribs are present, each of which touches the silencer tube and thereby delimit axial chambers.
  • Two gas outlet openings lead from the cylinder chamber to two different chambers.
  • these chambers are connected to a further chamber via throttles.
  • This chamber is a third chamber delimited by the ribs and is led to the outside via an inner, elongated passage.
  • the muffler pipe is made of a rubber, so that finally all parts with chambers and flow channels are made of a moldable material, which on the one hand can reduce the weight and on the other hand the manufacturing costs can be kept low in spite of expensive soundproofing.
  • the object of the invention is now to further reduce the sound pressure level and to expand the compressed air to such an extent that it flows out of the exhaust as uniformly as possible; the risk of icing should be reduced as far as possible and a simple and inexpensive solution should be achieved through the appropriate shaping of the plastic parts.
  • the hammer shown in the drawing consists of a handle 1 with a fixed handle 110 and a handle 111 with a handle 14, which acts in a known manner by means of a valve pin 31 on a valve ball 17 pressed with a spring 15 against the valve seat 7 when the Pusher 14 is depressed in order to guide compressed air from the air connection 32 into the cylinder 29.
  • the compressed air passes through a system of channels 62 in a top wall 10 of the cylinder 29 and by means of two radial bores 5, 6 to both sides of a valve plate 27 of a flap valve. From here, an air flow passes through a central opening 61 in the top wall 10 into the upper cylinder chamber 47 or via the channels 62 mentioned to flow channels 40, 41, 42 in order to bring compressed air into the lower cylinder chamber 46.
  • the cylinder 29 consists of a metal tube with a ground inner wall and a smooth outer wall.
  • a percussion piston 23 is located in this cylinder.
  • Four radial openings 52a-52d as gas outlets are located approximately in the middle of the cylinder 29.
  • the tool-side end of the cylinder 29 is closed with an anvil sleeve 11.
  • the anvil 28 is guided in an axially movable manner.
  • the lower edge of the cylinder 29 is surrounded by a cylindrical holding wall 63, which also serves to hold the anvil sleeve 11.
  • a wear sleeve 9 is also held in the holding wall 63, in which the tool W is then inserted.
  • the chisel holder 12 with the associated spring 22 and locking bolts 21 is also accommodated in the cylindrical holding wall 63.
  • the housing 2 is held in a rigid position with respect to the cylinder tube 29 by means of three radial ribs 43, 44, 45, which are connected in one piece to a composite cylinder 3 which also at least partially encompasses the cylinder tube 29 at the lower end.
  • counter ribs 64, 65, 66 with longitudinal grooves complementary to the tops of the ribs can be present on the inner wall of the housing 2 in order to hold the same precisely and rigidly with respect to the cylinder tube 29. This means that there is no need to fasten the ribs 43, 44 45 to the cylinder tube 29 or even completely cover the same.
  • the flow channels 40, 41, 42 already mentioned are located in the ribs 43, 44, 45. Two of these flow channels 40, 41 are connected to the lower cylinder chamber 46 by feed passages 461 and 462 (FIG. 3).
  • passage openings 54, 55 to a further chamber 58 are formed by recesses in this compound cylinder.
  • the composite cylinder 3 is provided in the exhaust 53 with a gas guide element 59 which forms a nozzle 591. This element could be molded onto the housing 2 or the housing 2 and compound cylinder 3 can together form a nozzle passage.
  • FIG. 4 shows a sectional view in the area of the handle 1 with a top view of the cover plate 10 in the deflection chamber 51.
  • the two chambers 48, 49 fed with exhaust gases from the cylinder space 46, 47 each have two through openings 602, 603, 604 and 605 and likewise the gases can be located in the third chamber 50 through two further passage openings 601, 606.
  • plastic parts such as housing 2, composite cylinder 3 with the ribs 43-45 and the guide flange 4 are rigidly held together by three tension bolts 13 screwed into the end flange of the holding cylinder 63 by the handle 1.
  • the exhaust gases from the cylinder 46, 47 are introduced into two expansion openings 52c, d, 52a, b, into an expansion chamber 48, 49, according to FIG.
  • the two elongate expansion chambers 48, 49 are connected to a resonance chamber 58 via through openings 54, 55.
  • the passages 602 to 605 form a connection to the deflection chamber 51, from where the gases then reach the exhaust 53 via the secondary chamber 50.
  • the outlet cross section is increasingly opened, which. is known to have a beneficial effect on sound development.
  • the gas thus simultaneously enters the two expansion chambers 48, 49, which have a volume that is matched to the sound produced.
  • the length of the expansion chambers is delimited on the one hand by the top wall 10 and on the other hand by the compound cylinder 3.
  • the unequal sizes of the through holes 54 formed between the composite cylinder 3 and housing by means of flange-like widening of the composite cylinder 3, 55 result in a different insulation to the resonance chamber 58, and therefore the sound pressures are not equal strongly attenuated at these locations, so that unequal frequency ranges by the resonance chamber 58, which acts as a Helmholtz resonator, can be absorbed and thus broadband noise reduction can be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Saccharide Compounds (AREA)
  • Surgical Instruments (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Earth Drilling (AREA)

Claims (7)

1. Marteau pneumatique, comportant un piston (23) qui est mobile axialement dans un tube cylindrique métallique (29) et qui sépare une chambre cylindrique inférieure (46) et une chambre cylindrique supérieure (47), un carter (2) en matière plastique, réalisé sous forme tubulaire et servant d'enveloppe extérieure munie d'au moins un orifice d'échappement (53), plusieurs canaux de circulation (40, 42) qui s'étendent longitudinalement pour l'alimentation de la chambre cylindrique inférieure (46) en air comprimé, une valve battante (27) qui est disposée dans une paroi de couvercle (10) du tube cylindrique (29) présentant un orifice (61) pour l'alimentation de la chambre cylindrique supérieure (47) en air comprimé, et des canaux (62) pour l'alimentation desdits canaux de circulation (40-42), au moins un orifice (52a-52d) disposé au moins à peu près au milieu dans le tube cylindrique (29) et servant d'orifice de sortie des gaz à partir des chambres cylindriques (46, 47) vers la cavité intérieure du carter (2), au moins un cylindre de liaison (4), qui est réalisé à la manière d'une bride, ferme au moins partiellement la cavité intérieure du carter (2) et subdivise celle-ci en une partie inférieure (57) et en une partie supérieure (56), ledit cylindre de liaison étant prévu d'une seule pièce avec plusieurs nervures longitudinales radiales (43, 44, 45) qui sont contiguës au tube cylindrique (29) et à la paroi intérieure du carter (2) et qui s'étendent jusqu'à la paroi du couvercle (10), pour séparer plusieurs chambres de forme allongée (48, 49, 50), au moins un orifice de sortie de gaz (52a-52d) à partir du tube cylindrique (29) débouchant dans au moins l'une desdites chambres (48, 49), et une troisième chambre (50, 51) reliée en série avec cette chambre (48, 49) étant en communication avec l'échappement (53) dans le carter (2), caractérisé en ce que dans la région des deux chambres (48, 49) en communication avec le tube cylindrique (29) par au moins un orifice de sortie de gaz (52a-52d), le cylindre de liaison (4) est muni d'orifices de passage (54, 55) vers la partie inférieure (57) du carter (2), et en ce que la partie . inférieure (57), réalisée sous forme d'espace résonnant (58), est en communication avec les chambres (48, 49).
2. Marteau selon la revendication 1, caractérisé en ce que dans la région de l'échappement (53), le cylindre de liaison (4) est réalisé sous forme d'élément de guidage des gaz (59).
3. Marteau selon la revendication 2, caractérisé en ce que l'élément de guidage des gaz (59) forme un ajutage.
4. Marteau selon la revendication 1, caractérisé en ce que l'échappement (53) communique avec la chambre de déviation (51).
5. Marteau selon la revendication 4, caractérisé en ce qu'il est disposé, entre l'échappement (53) et la chambre de déviation (51), une autre chambre secondaire (50) délimitée par deux nervures (44, 45) à l'intérieur du carter (2).
6. Marteau selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il existe des étranglements de section respectifs, d'une part au niveau des passages entre les chambres principales (48, 49) et la chambre de déviation (51) et, d'autre part, entre la chambre de déviation (51) et l'échappement (53).
7. Marteau selon la revendication 6, caractérisé en ce que les étranglements de section sont formés respectivement par des ouvertures (601-606) dans la paroi couvercle (10).
EP85810187A 1984-05-29 1985-04-26 Marteau penumatique Expired EP0166681B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85810187T ATE38008T1 (de) 1984-05-29 1985-04-26 Pneumatisch betriebener hammer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2639/84A CH663925A5 (de) 1984-05-29 1984-05-29 Anordnung von expansionskammern zur daempfung des schalldruckes, verwendung derselben und pneumatisch betriebener hammer.
CH2639/84 1984-05-29

Publications (2)

Publication Number Publication Date
EP0166681A1 EP0166681A1 (fr) 1986-01-02
EP0166681B1 true EP0166681B1 (fr) 1988-10-19

Family

ID=4238280

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85810187A Expired EP0166681B1 (fr) 1984-05-29 1985-04-26 Marteau penumatique

Country Status (6)

Country Link
US (1) US4673042A (fr)
EP (1) EP0166681B1 (fr)
JP (1) JPS60255372A (fr)
AT (1) ATE38008T1 (fr)
CH (1) CH663925A5 (fr)
DE (1) DE3565648D1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE461711B (sv) * 1989-01-16 1990-03-19 Atlas Copco Tools Ab Utloppsorgan foer ett tryckluftdrivet maskinverktyg
SE501276C2 (sv) * 1989-10-28 1995-01-09 Berema Atlas Copco Ab Handhållen slående maskin
US5142952A (en) * 1990-05-21 1992-09-01 Snap-On Tools Corporation Ratchet tool
US5107911A (en) * 1991-05-06 1992-04-28 Plakotaris Vincent A Log splitting device
FR2710284B1 (fr) * 1993-09-23 1995-11-24 Financ Forage Appareil pneumatique à percussion du type marteau-piqueur ou brise-béton.
KR200151343Y1 (ko) * 1995-04-14 1999-07-15 최해성 저 소음형 유압해머
US20070175942A1 (en) * 2003-04-04 2007-08-02 Stanley Fastening Systems, L.P. Pneumatic tool with as-cast air signal passage
EP2105261A1 (fr) * 2008-03-27 2009-09-30 AEG Electric Tools GmbH Outil électrique, en particulier marteau perforateur et/ou burineur
WO2010140922A1 (fr) * 2009-06-02 2010-12-09 Chernyshev Arkady Vasilevich Machine pneumatique à percussion présentant un niveau de sécurité par rapport aux vibrations
US20110232475A1 (en) * 2010-03-24 2011-09-29 Ching-Shun Chang Integrated cylinder and reversing assembly module of a reciprocating pneumatic tool

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2166218A (en) * 1937-04-06 1939-07-18 Ingersoll Rand Co Muffling device
US2128742A (en) * 1937-04-09 1938-08-30 Ingersoll Rand Co Muffling device
US3223181A (en) * 1962-03-27 1965-12-14 Vernon L Price Vibrationless air hammer assembly
US3255844A (en) * 1964-01-16 1966-06-14 Gardner Denver Co Multi-passage silencer for pneumatic tool
GB1055048A (en) * 1964-10-19 1967-01-11 Atlas Copco Ab Improvements in noise deadening means for percussive tools
US3880245A (en) * 1973-11-21 1975-04-29 Chicago Pneumatic Tool Co Exhaust noise attenuating system with muffler for pneumatic tools
US4018291A (en) * 1974-12-23 1977-04-19 Allied Steel & Tractor Products, Incorporated Pneumatic hammer
CH605044A5 (fr) * 1977-03-28 1978-09-29 Mekafor
FR2388646A1 (fr) * 1977-04-29 1978-11-24 Maco Meudon Sa Marteau brise-beton equipe de dispositifs silencieux
EP0015700B1 (fr) * 1979-02-28 1982-07-28 CompAir Construction and Mining Limited Dispositif pneumatique à piston effectuant un mouvement alternatif
US4303131A (en) * 1980-02-27 1981-12-01 Compair Construction And Mining Ltd. Compressed-gas-operated reciprocating piston devices

Also Published As

Publication number Publication date
US4673042A (en) 1987-06-16
CH663925A5 (de) 1988-01-29
EP0166681A1 (fr) 1986-01-02
ATE38008T1 (de) 1988-11-15
DE3565648D1 (en) 1988-11-24
JPS60255372A (ja) 1985-12-17

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