EP0505726B1 - Un outil à main de frappe ou de forage actionné par fluide - Google Patents

Un outil à main de frappe ou de forage actionné par fluide Download PDF

Info

Publication number
EP0505726B1
EP0505726B1 EP92102802A EP92102802A EP0505726B1 EP 0505726 B1 EP0505726 B1 EP 0505726B1 EP 92102802 A EP92102802 A EP 92102802A EP 92102802 A EP92102802 A EP 92102802A EP 0505726 B1 EP0505726 B1 EP 0505726B1
Authority
EP
European Patent Office
Prior art keywords
tool
insulating element
housing
insertion end
tool holder
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 - Lifetime
Application number
EP92102802A
Other languages
German (de)
English (en)
Other versions
EP0505726A1 (fr
Inventor
Robert-Jan Dr.-Ing. Bartels
Helmar Dipl.-Ing. Näfe
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.)
Construction Tools GmbH
Original Assignee
Krupp Bautechnik GmbH
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 Krupp Bautechnik GmbH filed Critical Krupp Bautechnik GmbH
Publication of EP0505726A1 publication Critical patent/EP0505726A1/fr
Application granted granted Critical
Publication of EP0505726B1 publication Critical patent/EP0505726B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit

Definitions

  • the invention relates to a hand-held, fluid-operated impact or drilling tool with a drive part movable in a housing, which acts to generate the working movement on the insertion end of an insertion tool, the insertion end also being supported within the housing and closely fitting over part of its longitudinal extent it is enclosed, socket-like insulating element made of elastic plastic.
  • EP-B2-0 019 568 accordingly makes the proposal for a similarly designed compressed air tool to equip it with an enclosing plastic sound-absorbing hood to insulate the outlet noise.
  • Embodiments of the devices mentioned here are also known, in which the latter - with the exception of a passage opening for the insertion tool - are encased on all sides in sound-absorbing material.
  • the tool insertion end is supported within the housing in a tool holder which is formed by a cylindrical extension of an intermediate anvil and executes movements with respect to the housing, the tool insertion end in the area of this tool holder being guided over the entire length of an elastic bushing.
  • US-A-1 459 500 relates to punching tools which are exposed to sand and dust and the sensitive parts of which are therefore to be protected accordingly.
  • the known device in question has a continuous piston rod instead of an insertion tool with a tool insertion end and is otherwise designed such that the drive means - while accepting the associated noise development and propagation - is deliberately discharged to the outside through channels.
  • the area of the support for the piston rod within the housing has a sealing element which is effective in the sense of a wiper.
  • the prior publication DE-A-34 40 530 describes a machine-operated striking tool which is completely encapsulated and has a disk-shaped insulating element which shields the outside outside the chisel guide.
  • the striking mechanism is supported by elastic insulation elements within the surrounding housing.
  • the range in which the drive part acts on the insertion end of the insertion tool and the latter is supported within the housing is not directly covered by the previously known sound insulation measures on fluid-operated impact or drilling tools.
  • the use of globally standardized and largely universally usable insertion tools requires a relatively large clearance to be allowed between the insertion tool and the tool holder.
  • the corresponding gap between the insert tool and the tool holder enables the working noise caused by the action of the drive part to spread.
  • the game-related movements of the insertion tool in the tool holder cause additional noises.
  • the invention has for its object to provide a soundproofing device on a hand-held, fluid-operated impact or drilling tool, with which the noise radiation in the receiving area of the insert tool can be reduced.
  • the soundproofing device should be inexpensive and, if possible, installable or replaceable with reasonable effort.
  • the object is achieved by a tool with the features of claim 1.
  • the idea of the solution on which the invention is based is to guide the insertion end on a tool holder which is stationary with respect to the housing, and to arrange the insulating element (which at least also fits tightly against the tool holder) held in the tool holder in the area of the tool holder, in the case of tilting no stress occurs at the insertion end, and the installation length of the To dimension insulation elements in such a way that in the longitudinal direction they make up a maximum of a quarter of the total length of the tool holder, including at least 10 millimeters.
  • the insulating element is thus arranged with respect to the tool holder in such a way that support and sealing is also ensured in the so-called neutral zone in any case.
  • the insertion end is centered and supported with respect to the tool holder via the elastically deformable insulating element, as a result of which the transmission of structure-borne noise to the environment is reduced and the space between the insertion end and the tool holder is sealed in the direction of the drive part.
  • This double function of the insulation element results in a reduction in the noise level overall; u. U. can be achieved by the proposal of the invention, a noise reduction by more than three dB.
  • the abovementioned installation of the insulating element at the insertion end can be achieved in particular by applying a pretension (claim 2).
  • a pretension (claim 2). This presupposes that the passage cross section of the insulating element is smaller than the cross section of the insertion end, so that pushing the insertion end onto the insulation element results in the formation of a positive and non-positive connection between the two components.
  • the insulating element is preferably also biased in the longitudinal direction between them (claim 3).
  • the insulation element in the area between the two bearing bushes should also be supported on the outside, for example via a surrounding housing wall.
  • the insulation element itself can be made of any material, provided that it shows sufficient deformability and sufficient suspension behavior, taking into account the working conditions. In many cases it will be advisable to make the insulating element out of plastic; the use of polyurethane or Perbunan is particularly suitable (claim 4).
  • the pneumatic hammer has - viewed from the outside - three main components attached to each other, namely a handle 1, a housing 2 and an end cap 3 with a passage opening (not shown) for an insertion tool 4.
  • This has - lying inside the main components 2 and 3 - in the connection to a shoulder 4a an insertion end 4b with a hexagonal cross section.
  • the end cap 3 serves at the same time on a not shown paragraph on it Passage opening in cooperation with paragraph 4a to limit the range of motion of the insertion tool 4 with respect to the main components 2 and 3 in the axial direction.
  • the housing 2 receives a drive part in the form of a percussion piston 5, the striking surface 5a of which acts on the end face 4c - and thus on the insertion tool 4 - during operation.
  • the drive unit (not shown) for the percussion piston 5 can be designed in a manner known per se, for example as shown and described in EP-B 2-0 019 568.
  • the tool holder serving as a guide in the exemplary embodiment shown consists of two spaced-apart bearing bushes 6 and 7, through the end faces 6a, 7a of which face away from one another, the total length L of the tool holder is defined.
  • the bearing bushes are pressed into a bore 2a of the housing 2 and laterally enclose the insertion end 4b with a relatively large clearance (indicated by the note "s").
  • the insulating element 8 lies in the part of the longitudinal extension of the insertion end 4b which comprises the neutral zone N (indicated by dash-dotted lines) of the tool holder; in this - only schematically indicated - neutral zone of the tool holder there are no loads when the insert tool 4 is tilted.
  • the insulating element 8 is designed in accordance with the invention in such a way that it rests under tension on the one hand at the insertion end 4b and on the other hand both on the bearing bushes 6, 7 and on the housing 2; the last-mentioned support results from the fact that the initial length of the insulating element 8 is greater than the installation length 1 shown.
  • the installation of the insulating element 8 between the bearing bushes 6 and 7 has the result that the plug-in end 4b experiences an additional, movement-damping centering in the area of the tool holder, by means of which the transmission of structure-borne noise between the plug-in end 4b and the tool holder (bearing bushes 6, 7) is reduced becomes.
  • the insulating element 8 seals the surroundings against the noises which arise in the impact area between the percussion piston 5 and the insertion end 4b and which could normally spread outwards through the space s between the tool holder and the insertion end.
  • a disc 9 is inserted into the bearing bush 7 on the front side 7a, the outer diameter of which corresponds at least to that of paragraph 4a and which defines the freedom of movement of the insertion tool 4 in the direction of the percussion piston 5.
  • the pane is preferably made of insulating material, for example polyurethane or Perbunan.
  • the invention can also be used on drilling tools.
  • the torque generated by a rotary drive is exceeded, for example transfer the housing of the striking mechanism and the insertion end to the insertion tool.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
  • Earth Drilling (AREA)

Claims (4)

  1. Outil manuel de frappe ou de foration, entraîné par un fluide, comportant une pièce d'entraînement (5), mobile dans un carter (2) et qui, pour produire le mouvement d'entraînement, agit sur l'embout d'emmanchement (4b) d'un outil à emmanchement (4), étant entendu que l'embout d'emmanchement (4b) prend, de même, appui à l'intérieur du carter (2) et est entouré, sur une partie de son extension longitudinale (l), par un élément insonorisant (8) en forme de douille, en matériau élastique, placé étroitement contre lui,
       caractérisé
    - en ce que l'embout d'emmanchement (4b) est guidé contre un emmanchement d'outil (6, 7), fixe par rapport au carter (2);
    - en ce que l'élément insonorisant (8), également au moins maintenu contre l'emmanchement d'outil (6, 7), se trouve dans la zone (N) de l'emmanchement d'outil, zone dans laquelle, en cas d'arc-boutement de l'embout d'emmanchement (4), ne se produit aucune sollicitation;
    - et en ce que la longueur installée (l) de l'élément insonorisant (8) représente, dans la direction longitudinale, au maximum, un quart de la longueur totale (L) de l'emmanchement d'outil (6, 7) qu'il entoure, mais est d'au moins 10 mm.
  2. Dispositif suivant la revendication 1, caractérisé en ce que l'élément insonorisant (8) entoure, avec une précontrainte, l'embout d'emmanchement (4b).
  3. Dispositif suivant au moins l'une des revendications précédentes, caractérisé en ce que l'emmanchement d'outil présente deux douilles d'appui (6, 7) séparées l'une de l'autre, entre lesquelles également l'élément insonorisant (8) est maintenu, avec une précontrainte, dans le sens longitudinal.
  4. Dispositif suivant au moins l'une des revendications précédentes, caractérisé en ce que l'élément insonorisant (8) est constitué de polyuréthanne ou de perbunan.
EP92102802A 1991-03-28 1992-02-20 Un outil à main de frappe ou de forage actionné par fluide Expired - Lifetime EP0505726B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4110261 1991-03-28
DE4110261A DE4110261A1 (de) 1991-03-28 1991-03-28 Schalldaemmeinrichtung an einem handgefuehrten, fluidbetriebenen schlag- oder bohrwerkzeug

Publications (2)

Publication Number Publication Date
EP0505726A1 EP0505726A1 (fr) 1992-09-30
EP0505726B1 true EP0505726B1 (fr) 1996-12-04

Family

ID=6428437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92102802A Expired - Lifetime EP0505726B1 (fr) 1991-03-28 1992-02-20 Un outil à main de frappe ou de forage actionné par fluide

Country Status (3)

Country Link
EP (1) EP0505726B1 (fr)
AT (1) ATE145847T1 (fr)
DE (2) DE4110261A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200151343Y1 (ko) * 1995-04-14 1999-07-15 최해성 저 소음형 유압해머
WO1998005476A1 (fr) * 1996-07-31 1998-02-12 Sds Digger Tools Pty. Ltd. Systeme de retention d'un trepan place a l'avant
EP1733850A1 (fr) * 2005-06-15 2006-12-20 Caterpillar, Inc. Amortisseur pour l'ensemble porte-outil d'un outil avec mouvement de va-et-vient

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1495500A (en) * 1922-01-30 1924-05-27 Chicago Pneumatic Tool Co Packing for pneumatic tools
GB565783A (en) * 1943-02-22 1944-11-28 Rubber Bonders Ltd Improvements in and relating to fluid pressure operated tools
GB1055048A (en) * 1964-10-19 1967-01-11 Atlas Copco Ab Improvements in noise deadening means for percussive tools
DE1299577B (de) * 1966-11-16 1969-07-17 Hausherr & Soehne Rudolf Vorrichtung zur Laermminderung an schlagend arbeitenden Werkzeugen
DE2844110A1 (de) * 1978-10-10 1980-04-24 Bosch Gmbh Robert Handwerkzeugmaschine, insbesondere meisselhammer
FR2457152A1 (fr) * 1979-05-22 1980-12-19 Montabert Roger Silencieux pour marteau pneumatique
DE3440530A1 (de) * 1983-11-02 1985-05-09 Heinrich 1000 Berlin Henze Hydraulischer aufbruchhammer

Also Published As

Publication number Publication date
ATE145847T1 (de) 1996-12-15
DE4110261A1 (de) 1992-10-01
DE59207598D1 (de) 1997-01-16
EP0505726A1 (fr) 1992-09-30

Similar Documents

Publication Publication Date Title
EP0949988B1 (fr) Marteau piqueur/perforateur avec poignee suspendue sur ressort contre le carter du marteau
EP1882559B1 (fr) Outil à main doté d'un dispositif de découplage
DE19815650B4 (de) Drehbohrhammer
EP0385059A2 (fr) Fôret
CH695312A5 (de) Zusatzhandgriff.
EP0472982A2 (fr) Appareil de forage tournant et frappant actionné hydrauliquement, spécialement pour le forage d'ancrage
DE19628815C2 (de) Schutzvorrichtung zum Verhindern des Eindringens von Verunreinigungen an einem fluidbetriebenen Schlagwerk
EP4058245A1 (fr) Ensemble mécanisme de percussion
EP0505726B1 (fr) Un outil à main de frappe ou de forage actionné par fluide
EP1691954B1 (fr) Marteau perforateur et/ou marteau pneumatique comportant un manche guide lineairement
DE3504871C2 (de) Gerät bestehend aus Trägereinheit und Schlagaggregat
DE19543861A1 (de) Verschließfester Hydraulikhammer mit niedrigem Lärmpegel
DE4136584B4 (de) Bohr- und Meisselgerät mit Werkzeugaufnahme
DE9014879U1 (de) Hydraulisch betätigtes Schlagwerkzeug, insbesondere Hydraulikhammer
EP0144282B1 (fr) Marteau hydraulique
DE3936849A1 (de) Elektrisch angetriebene handwerkzeugmaschine
DE3440530A1 (de) Hydraulischer aufbruchhammer
EP0312831B1 (fr) Dispositif de protection contre les vibrations pour marteau burineur pneumatique
DE4239665C2 (de) Tragbares Schlagwerkzeug mit Vibrationsdämpfung
EP3578317B1 (fr) Machine-outil portable
EP3996878B1 (fr) Lèvre de scellement au raccordement d'outil
DE602005004627T2 (de) Zylinderschutzvorrichtung zur Verhinderung von Rauschen
EP0708225A1 (fr) Elément d'amortissement pour un foret à extension télescopique
EP4378629A1 (fr) Dispositif de réception d'outil pour un marteau perforateur ou burineur doté d'un amortissement de frappe à vide et de percussion
EP3763467A1 (fr) Couvercle de protection anti-poussière à découplage de vibrations

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19930310

17Q First examination report despatched

Effective date: 19931108

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KRUPP BAUTECHNIK GMBH

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB

REF Corresponds to:

Ref document number: 145847

Country of ref document: AT

Date of ref document: 19961215

Kind code of ref document: T

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19961205

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970113

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19970114

Year of fee payment: 6

REF Corresponds to:

Ref document number: 59207598

Country of ref document: DE

Date of ref document: 19970116

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19970128

Year of fee payment: 6

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980220

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980220

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19980228

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980220

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030204

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040901