EP0522190A1 - Mandrin antibruit pour martian de forage ou à coup actionner par fluide hydraulique ou pneumatique - Google Patents

Mandrin antibruit pour martian de forage ou à coup actionner par fluide hydraulique ou pneumatique Download PDF

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Publication number
EP0522190A1
EP0522190A1 EP91111476A EP91111476A EP0522190A1 EP 0522190 A1 EP0522190 A1 EP 0522190A1 EP 91111476 A EP91111476 A EP 91111476A EP 91111476 A EP91111476 A EP 91111476A EP 0522190 A1 EP0522190 A1 EP 0522190A1
Authority
EP
European Patent Office
Prior art keywords
tool
sound
holding
bushing
soundproofing
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.)
Granted
Application number
EP91111476A
Other languages
German (de)
English (en)
Other versions
EP0522190B1 (fr
Inventor
Bernhard Güthling
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.)
Ingersoll Rand Co Ltd
Original Assignee
Ingersoll Rand Co Ltd
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 Ingersoll Rand Co Ltd filed Critical Ingersoll Rand Co Ltd
Priority to EP91111476A priority Critical patent/EP0522190B1/fr
Priority to AT91111476T priority patent/ATE120998T1/de
Priority to DE59105188T priority patent/DE59105188D1/de
Publication of EP0522190A1 publication Critical patent/EP0522190A1/fr
Application granted granted Critical
Publication of EP0522190B1 publication Critical patent/EP0522190B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the invention relates to a compressed air-operated or hydraulically operating percussion and drilling tool, so-called pneumatic or hydraulic hammer, with a hammer cylinder acting on a plug-in tool by a percussion piston, with an open holding cap for receiving a tool holding pawl, a tool holding bracket or a similar holding element.
  • compressed air and hydraulically operated impact and drilling tools so-called compressed air or hydraulic hammers, are used in the entire construction industry.
  • a percussion piston is a working tool - e.g. a point iron, a spade or a boring bar - applied to its impact surface and driving it into the material to be split or drilled.
  • the working tool is usually carried out in the case of impact tools for securing against rotation, in the case of drilling tools for transmitting the rotary movement to the boring bar, with a hexagon in the area of the tool holder.
  • the hammers designated are equipped with a holding cap which, among other things, receives a tool holding pawl, a tool holding bracket or a similar holding element.
  • the working tool is freely movable in its longitudinal axis in the area of the tool holder within its collar system - on the one hand by the holding element and on the other hand by the system on the tool holder.
  • a holding pawl is used to hold the insertion tool, which acts directly on the unprotected insertion tool (chisel or boring bar) and thereby considerably reduces the sound absorption in this area.
  • a muffler for a rotary hammer which shows a sleeve arranged on the front of the rotary hammer and surrounding the shaft directly protruding from the rotary hammer, which sleeve consists of sound-absorbing material and is pushed over a sleeve, which is the joint releasably connects between the drill shaft and the drill rod.
  • the object of the invention is to provide effective sound insulation for pneumatic or hydraulically operated percussion or drilling tools, so-called compressed air or hydraulic hammers, with open holding caps with tool holding pawl, tool holding bracket or another holding element in the area of the emerging sound by incorporating sound reflecting and sound absorbing devices to ensure that a noise level emerges and is measured that corresponds at least to the noise level of pneumatic hammers with the retaining cap and soundproofing jacket closed.
  • the area of the sound outlet within the tool holder is designed in such a way that a wear-resistant, sound-absorbing and non-metallic bushing is arranged in the case of pneumatic or hydraulic hammers with an open holding cap, with a tool holding pawl for the striking tool or with a tool holding bracket for the boring bar.
  • this bushing is arranged in the region of the holding cap, tool holder and insertion tool, and in the case of rotary hammers, expediently in the region of the tool holding bracket, front cylinder, drill sleeve, wear bushing and boring bar.
  • the sound-reflecting and sound-absorbing measures consist in the fact that, for example, a perforated socket is used which is continuously provided on the outer circumference with a large number of bores / openings.
  • bushings with individual recesses of any design and number distributed over the inner circumference can also be used as sound-reflecting and sound-absorbing measures in compressed air or rotary hammers with an open retaining cap.
  • the soundproofing sleeve is part of the drill sleeve, i.e. in this case the lower part of the steel drill sleeve has openings or recesses which are intended to absorb the sound.
  • plastics or plastics-like materials can be selected which, on the one hand, must be insensitive to the action of lubricating oils and greases, and, on the other hand, should be wear-resistant and heat-insensitive to possible friction from the striking or rotating insertion tools, such as chisels or boring bars .
  • Fig. 1 the area of the tool holder of a pneumatic hammer (1) with an open holding cap (2) is shown without soundproofing.
  • the working principle of these hammers is that a percussion piston (6) an insertion tool (4), designed as a point or spade, executed in Figures 6 and 7 as a boring bar, applied to the impact surface (7) and the insertion tool (4) into the material that is to be split or drilled is of great hardness, strength, toughness, etc.
  • the insertion tool (4) is usually carried out in the case of impact tools for securing against rotation with a hexagon (4a) in the region of the tool holding cylinder (5).
  • the insertion tool (4) is freely movable in its longitudinal axis in the area of the tool holding cylinder (5) within its collar system - on the one hand by the holding pawl (3) and on the other hand by the contact with the tool holding cylinder (5).
  • Fig. 2 shows the area of the tool holder cylinder (5) of a pneumatic hammer (1) with an open holding cap (2) and tool holding pawl (3), in which a perforated sound insulation sleeve (14, 14a) is attached as a soundproofing measure.
  • This sound insulation bushing (14, 14a) is inserted between the holding cap (2) and the tool holder cylinder (5) or detachably fastened to the inner wall of the holding cap (2).
  • 3 - 5 show different possible configurations of the socket.
  • Fig. 3 shows a soundproofing sleeve (14) made of wear-resistant, sound-absorbing and non-metallic material with a plurality of bores (14a), which are arranged continuously on their outer circumference inwards.
  • Fig. 4 shows a soundproofing sleeve (14) with a plurality of parallel grooves (14b) which are cut out on the inside diameter of the soundproofing sleeve (14).
  • Fig. 5 shows a sound insulation bushing (14) with a swirl groove (14c) cut on the inside diameter.
  • the sound waves passing through the area of the sound insulation bushing (14) are reflected and absorbed differently in the bores (14a), parallel grooves (14b) or swirl grooves (14c), so that these measures reduce noise.
  • Another (not shown) embodiment of the soundproofing bushing (14) could be a bushing with a large number of individual recesses of any shape distributed over the inner circumference.
  • FIG. 6 shows the area of the tool holder of a rotary hammer (8) with an open holding cap, here referred to as the front cylinder (13), and tool holding bracket (10) without soundproofing measure.
  • the working principle of the rotary hammers (8) is similar to that of the pneumatic hammers (1).
  • a percussion piston (6) hits the boring bar (9) at the impact surface (7) at high speed, which is guided above the boring bar hexagon in a wear bushing (11).
  • This wear bushing (11) is guided in the drill sleeve (12), which in turn is guided in the front cylinder (13).
  • the boring bar (9) can move freely in its longitudinal axis between the drill retaining bracket (10) and the wear bushing (11). The mobility is limited by the bead between the hexagon (9a) and the boring bar (9).
  • Fig. 7 shows the hammer drill (8) with soundproofing bushing (14), which, similar to the pneumatic hammer (1), is either inserted between the front cylinder (13) and the wear bushing (11) or releasably attached to the inner wall of the front cylinder (13) is.
  • a parallel grooved soundproofing bushing (14, 14b), a swirl grooved soundproofing bushing (14, 14c) or a bushing with any recesses can be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Drilling And Boring (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP91111476A 1991-07-10 1991-07-10 Mandrin antibruit pour martian de forage ou à coup actionner par fluide hydraulique ou pneumatique Expired - Lifetime EP0522190B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP91111476A EP0522190B1 (fr) 1991-07-10 1991-07-10 Mandrin antibruit pour martian de forage ou à coup actionner par fluide hydraulique ou pneumatique
AT91111476T ATE120998T1 (de) 1991-07-10 1991-07-10 Schallgedämpfte werkzeugaufnahme für druckluftbetriebene oder hydraulisch arbeitende schlag- und bohrhämmer.
DE59105188T DE59105188D1 (de) 1991-07-10 1991-07-10 Schallgedämpfte Werkzeugaufnahme für druckluftbetriebene oder hydraulisch arbeitende Schlag- und Bohrhämmer.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91111476A EP0522190B1 (fr) 1991-07-10 1991-07-10 Mandrin antibruit pour martian de forage ou à coup actionner par fluide hydraulique ou pneumatique

Publications (2)

Publication Number Publication Date
EP0522190A1 true EP0522190A1 (fr) 1993-01-13
EP0522190B1 EP0522190B1 (fr) 1995-04-12

Family

ID=8206921

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91111476A Expired - Lifetime EP0522190B1 (fr) 1991-07-10 1991-07-10 Mandrin antibruit pour martian de forage ou à coup actionner par fluide hydraulique ou pneumatique

Country Status (3)

Country Link
EP (1) EP0522190B1 (fr)
AT (1) ATE120998T1 (fr)
DE (1) DE59105188D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999004937A1 (fr) * 1997-07-23 1999-02-04 Wacker-Werke Gmbh & Co. Kg Dispositif de percussion pour la liberation par percussion d'objets bloques

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783970A (en) * 1972-06-07 1974-01-08 Thor Power Tool Co Sound attenuating device for a work steel or the like
DE2926449A1 (de) * 1978-07-04 1980-01-24 Tampella Oy Ab Schalldaempfer fuer einen bohrhammer
DE3905248A1 (de) * 1989-02-21 1990-08-23 Eco Air Drucklufttechnik Gmbh Haltekappensicherung fuer drucklufthaemmer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783970A (en) * 1972-06-07 1974-01-08 Thor Power Tool Co Sound attenuating device for a work steel or the like
DE2926449A1 (de) * 1978-07-04 1980-01-24 Tampella Oy Ab Schalldaempfer fuer einen bohrhammer
DE3905248A1 (de) * 1989-02-21 1990-08-23 Eco Air Drucklufttechnik Gmbh Haltekappensicherung fuer drucklufthaemmer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999004937A1 (fr) * 1997-07-23 1999-02-04 Wacker-Werke Gmbh & Co. Kg Dispositif de percussion pour la liberation par percussion d'objets bloques
US6298923B1 (en) 1997-07-23 2001-10-09 Wacker-Werke Gmbh & Co. Kg Impacting device for releasing blocked objects by impact

Also Published As

Publication number Publication date
ATE120998T1 (de) 1995-04-15
DE59105188D1 (de) 1995-05-18
EP0522190B1 (fr) 1995-04-12

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