EP1886767A2 - Machine-outil manuelle dotée d'une sonnette pneumatique - Google Patents

Machine-outil manuelle dotée d'une sonnette pneumatique Download PDF

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Publication number
EP1886767A2
EP1886767A2 EP07113295A EP07113295A EP1886767A2 EP 1886767 A2 EP1886767 A2 EP 1886767A2 EP 07113295 A EP07113295 A EP 07113295A EP 07113295 A EP07113295 A EP 07113295A EP 1886767 A2 EP1886767 A2 EP 1886767A2
Authority
EP
European Patent Office
Prior art keywords
damping element
hand tool
striker
axially
anvil
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.)
Withdrawn
Application number
EP07113295A
Other languages
German (de)
English (en)
Other versions
EP1886767A3 (fr
Inventor
Stefan Hammerstingl
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP1886767A2 publication Critical patent/EP1886767A2/fr
Publication of EP1886767A3 publication Critical patent/EP1886767A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/005—Arrangements for adjusting the stroke of the impulse member or for stopping the impact action when the tool is lifted from the working surface
    • 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
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0015—Anvils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • B25D2222/66—Polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/131—Idling mode of tools

Definitions

  • the invention refers to an at least partially striking hand tool with a pneumatic impact mechanism such as a chisel hammer or a hammer drill.
  • a pneumatic percussion mechanism has a guided in a guide tube and driven by an air spring air piston, which usually strikes a limited axially movable striker, which hits even the front end of a limited axially movable tool.
  • EP0014760 and the W003024671 has a beating hand tool with a pneumatic percussion on a damping element, which dampens both a free space of the flying piston and an impact impact of the striker. It points after the W003024671 the flying piston on an axially offset outer portion by a tapered portion, which penetrates rubbing into a radially narrower steel ring of the damping element and thereby dissipates a large part of the kinetic energy of the flying piston in the damping element during idle over a long axial pre-damping.
  • the object of the invention consists in a suitable damping of both the blank and the impact impact of the striker damping element.
  • a hand tool for at least partially beating drive a tool a pneumatic percussion with a guided in a guide tube as well as by an air spring axially reciprocatingly driven air piston, which on the tool side strikes a limited axially movable striker, which is axially impact contacted with the tool, wherein in the guide tube, a viscoelastic damping element is arranged, which radially inwardly limited in an axially on both sides, encircling radial groove of the striker engages.
  • the radial groove of the striker has an axial length in the range of half to twice the diameter of the striker, whereby the axial movement of the striker in the normal operating state is not limited by the damping element.
  • the damping element is annular, further advantageous as an O-ring with a ring thickness in the range of one quarter to one third of the diameter of the striker, whereby by utilizing the rotational symmetry standardized components with a sufficiently large dissipation volume can be used.
  • the damping element is arranged with its radially outer part in a Radialinnennut of the guide tube, further advantageously supported axially by means of annular disks, whereby a majority of the damping element is disposed in the radial region of the guide tube and thus the striker in the axial region of the radial groove is only slightly tapered, which its acoustic Impedance at the axial edge of the radial groove does not change significantly and thus causes practically no reflections of the shock wave.
  • the damping element consists of a fluoro-elastomer, such as vinylidene fluoride-hexafluoro-propylene (VF2 / HFP), whereby a highly wear-resistant and high-temperature resistant damping element is realized.
  • VF2 / HFP vinylidene fluoride-hexafluoro-propylene
  • a hand tool machine 1 (only partially shown) drives a tool 3 introduced into a tool holder 2 along an axis A in a rotating and striking manner, in that a pneumatic percussion mechanism 4 is axially guided by a spring tube 6 guided in a guide tube 5 and by an air spring 6. and forth powered driven air piston 7 is present, which on the tool side strikes a limited axially movable striker 8, which in turn strikes the tool 3 axially.
  • a viscoelastic damping element 9 of vinylidene fluoride-hexafluoro-propylene VF2 / HFP is arranged in the form of an O-ring with its radially outer part in a Radialinnennut 10 of the guide tube 5 and axially supported by an annular disc 11.
  • the damping element 9 with a ring thickness R of one quarter of the diameter D of the striker 8 engages radially inwardly with an axially limited axial limitations on both sides 12, circumferential radial groove 13 of the striker 8, whose axial length L corresponds to the diameter D of the striker 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP07113295A 2006-08-07 2007-07-27 Machine-outil manuelle dotée d'une sonnette pneumatique Withdrawn EP1886767A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006000395A DE102006000395A1 (de) 2006-08-07 2006-08-07 Handwerkzeugmaschine mit pneumatischem Schlagwerk

Publications (2)

Publication Number Publication Date
EP1886767A2 true EP1886767A2 (fr) 2008-02-13
EP1886767A3 EP1886767A3 (fr) 2008-02-27

Family

ID=38693557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07113295A Withdrawn EP1886767A3 (fr) 2006-08-07 2007-07-27 Machine-outil manuelle dotée d'une sonnette pneumatique

Country Status (3)

Country Link
US (1) US20080029283A1 (fr)
EP (1) EP1886767A3 (fr)
DE (1) DE102006000395A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2105260A1 (fr) * 2008-03-28 2009-09-30 Makita Corporation Outil d'impact
EP2254732A1 (fr) * 2008-02-20 2010-12-01 Robert Bosch GmbH Machine-outil à main

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8763874B2 (en) 2007-10-05 2014-07-01 Senco Brands, Inc. Gas spring fastener driving tool with improved lifter and latch mechanisms
NZ584294A (en) * 2007-10-05 2012-08-31 Senco Brands Inc Fastener driving tool using a gas spring
US8636081B2 (en) 2011-12-15 2014-01-28 Milwaukee Electric Tool Corporation Rotary hammer
US20240123589A1 (en) * 2019-11-12 2024-04-18 Hilti Aktiengesellschaft Impact mechanism arrangement
SE2230406A1 (en) * 2022-12-09 2024-03-12 Atlas Copco Ind Technique Ab Hand-held percussive tool

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2207962A1 (de) * 1972-02-21 1972-08-30 Bosch Gmbh Robert Luftfederhammer
NL7810416A (nl) * 1977-12-21 1979-06-25 Duss Maschf Electropneumatische hamer, voorzien van een vangring voor de slagzuiger.
EP0014760A1 (fr) * 1979-01-31 1980-09-03 Black & Decker Inc. Système de marche à vide et de remplissage d'air pour mécanisme de marteau à percussion
DE19933972A1 (de) * 1999-07-20 2001-01-25 Bosch Gmbh Robert Bohr- oder Schlaghammer
EP1147861A2 (fr) * 2000-04-18 2001-10-24 HILTI Aktiengesellschaft Outil électrique à main avec coupure de la percussion
WO2003024671A2 (fr) * 2001-09-17 2003-03-27 Milwaukee Electric Tool Corporation Marteau rotatif
US20040194987A1 (en) * 2001-03-07 2004-10-07 Andreas Hanke Hammer

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1896992A (en) * 1930-02-06 1933-02-07 Agren Ernst Malcus Arrangement in striking tools
US3179185A (en) * 1962-06-14 1965-04-20 Chicago Pneumatic Tool Co Demolition tool with shock attenuating means
DE2229388C3 (de) * 1972-06-16 1981-01-22 Robert Bosch Gmbh, 7000 Stuttgart Von Hand zu führender Bohrhammer
DE3010479A1 (de) * 1980-03-19 1981-10-08 Robert Bosch Gmbh, 7000 Stuttgart Werkzeugmaschine, insbesondere handwerkzeugmaschine mit einem luftfederschlagwerk
ATE11750T1 (de) * 1980-11-18 1985-02-15 Black & Decker Inc. Schlagbohrgeraet.
US4648609A (en) * 1985-01-22 1987-03-10 Construction Robotics, Inc. Driver tool
DE3633675A1 (de) * 1986-10-03 1988-04-14 Hilti Ag Bohrhammer mit schlagwerk
JP2552566B2 (ja) * 1990-04-05 1996-11-13 株式会社マキタ 打撃工具
US5363835A (en) * 1992-08-31 1994-11-15 Rocktec Limited Nose block assembly
JP3424870B2 (ja) * 1995-02-28 2003-07-07 株式会社マキタ 打撃工具の空打ち防止装置
JP3292972B2 (ja) * 1996-03-29 2002-06-17 株式会社マキタ 打撃工具
DE19714287A1 (de) * 1997-04-07 1998-10-08 Hilti Ag Bohr- und/oder Meisselgerät
DE29711704U1 (de) * 1997-07-04 1997-09-04 Hilti Ag, Schaan Bohr- und/oder Meißelgerät
US5896934A (en) * 1997-09-08 1999-04-27 Chicago Pneumatic Tool Company Reciprocating tool having a piston retainer
DE10209293A1 (de) * 2002-03-01 2003-09-18 Hilti Ag Pneumatisches Schlagwerk
JP4179159B2 (ja) * 2003-12-18 2008-11-12 日立工機株式会社 打撃工具
DE102005000179A1 (de) * 2005-12-07 2007-06-14 Hilti Ag Hammerschlaggerät

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2207962A1 (de) * 1972-02-21 1972-08-30 Bosch Gmbh Robert Luftfederhammer
NL7810416A (nl) * 1977-12-21 1979-06-25 Duss Maschf Electropneumatische hamer, voorzien van een vangring voor de slagzuiger.
EP0014760A1 (fr) * 1979-01-31 1980-09-03 Black & Decker Inc. Système de marche à vide et de remplissage d'air pour mécanisme de marteau à percussion
DE19933972A1 (de) * 1999-07-20 2001-01-25 Bosch Gmbh Robert Bohr- oder Schlaghammer
EP1147861A2 (fr) * 2000-04-18 2001-10-24 HILTI Aktiengesellschaft Outil électrique à main avec coupure de la percussion
US20040194987A1 (en) * 2001-03-07 2004-10-07 Andreas Hanke Hammer
WO2003024671A2 (fr) * 2001-09-17 2003-03-27 Milwaukee Electric Tool Corporation Marteau rotatif

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2254732A1 (fr) * 2008-02-20 2010-12-01 Robert Bosch GmbH Machine-outil à main
EP2105260A1 (fr) * 2008-03-28 2009-09-30 Makita Corporation Outil d'impact
US8037947B2 (en) 2008-03-28 2011-10-18 Makita Corporation Impact tool with shock absorbing element

Also Published As

Publication number Publication date
EP1886767A3 (fr) 2008-02-27
US20080029283A1 (en) 2008-02-07
DE102006000395A1 (de) 2008-02-14

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