EP2018937A2 - Machine-outil avec amortisseur - Google Patents

Machine-outil avec amortisseur Download PDF

Info

Publication number
EP2018937A2
EP2018937A2 EP08104131A EP08104131A EP2018937A2 EP 2018937 A2 EP2018937 A2 EP 2018937A2 EP 08104131 A EP08104131 A EP 08104131A EP 08104131 A EP08104131 A EP 08104131A EP 2018937 A2 EP2018937 A2 EP 2018937A2
Authority
EP
European Patent Office
Prior art keywords
handle
damping
hand tool
handles
elastic material
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Withdrawn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
EP08104131A
Other languages
German (de)
English (en)
Other versions
EP2018937A3 (fr
Inventor
Olaf Koch
Alexander Buchenau
Vera Nuebel
Uto Plank
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 EP2018937A2 publication Critical patent/EP2018937A2/fr
Publication of EP2018937A3 publication Critical patent/EP2018937A3/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Withdrawn legal-status Critical Current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
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • B25D17/043—Handles resiliently mounted relative to the hammer housing
    • 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
    • B25D17/24—Damping the reaction force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/006—Vibration damping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/21—Metals
    • B25D2222/42—Steel
    • 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
    • B25D2222/57—Elastomers, e.g. rubber
    • 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
    • B25D2222/61—Polyamides, e.g. Nylon
    • 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
    • B25D2250/275—Tools having at least two similar components

Definitions

  • a disadvantage of the known solution is that the force acting on the hand tool when it falls over can be reduced substantially only via the bearing point of the handles.
  • the storage of the handles must have sufficient stability.
  • the sleeve-shaped damping element is therefore not sufficient for a sufficient degradation or conversion of the resulting energy, which can lead to damage of individual components of the power tool.
  • the object of the invention is to provide a hand tool with vibration-damped handles, wherein the hand tool has a high resistance to damage due to the falling of the power tool.
  • the damping body When the hand tool unit falls over onto the handles, a large part of the impact energy is absorbed by the damping body.
  • the radially encircling portion which is present due to the greater radial extent of the damping body relative to the radial extent of the handle, deforms upon impact of the power tool. As a result, 60% to 80% of the impact energy is eliminated by this damping body.
  • the Dämpfhülse between the bearing portion of the handle and the handle mounting axis destroys the largest proportion of the remaining still acting on the power tool impact energy.
  • the support elements of the handles themselves no longer have to compensate for high impact forces, which significantly extends their usability and significantly reduces the manufacturing costs for the handles.
  • the radial extent of the damping body 1.05 times to 1.8 times, particularly advantageously 1.2 times to 1.5 times, the minimum radial extent of the handle at the free end, which has a sufficiently large radially encircling, easily deformable, bead-like portion the damping body forms.
  • the z. B. made of metal support member of the handle at least partially surrounded by a grip sleeve made of an elastic material as a third damping element, wherein the sleeve surrounds the free end of the support member of the handle at least partially and the damping body adjoins the grip sleeve.
  • the grip sleeve is made of a Nitrilbutylrubber (NBR).
  • NBR Nitrilbutylrubber
  • NR natural rubber
  • PA polyamide
  • the grip sleeve is made of two materials, wherein the support element facing the material has a lower elasticity than the material facing away from the support member.
  • the material facing the support member is a hard plastic, which ensures the stability of the grip sleeve, and the material facing away from the support element, a soft plastic, which ensures sufficient grip of the handle.
  • the materials are chosen so that they deform under load and thus can destroy part of the impact energy.
  • the handles are pivotally mounted about a handle mounting axis forming the pivot axis in the power tool and it is to limit the pivoting of the handles provided a stop element made of an elastic material as a fourth damping element.
  • the stop element is made of a Nitrilbutylrubber (NBR).
  • NBR Nitrilbutylrubber
  • a damping sleeve is provided in each case as a first damping element between the pivot axis and the bearing portion of the handle.
  • the stop element forms a further damping element for eliminating the impact forces, which ensures an advantageous fall protection of the hand tool. Due to the pivoting, the handles have a high Vibration damping, while at the same time the Dämpfhülse can absorb any impact energy still to be absorbed.
  • an insert element made of an elastic material is provided as a fifth damping element between a radially projecting collar portion of the handle and the outer housing.
  • the insert element is made of a Nitrilbutylrubber (NBR).
  • NBR Nitrilbutylrubber
  • a damping body 36 is provided as a second damping element having an extension D in the radial direction relative to the longitudinal axis 23 of the handle 21, which is greater than the corresponding extension T of the handle 21 at the free end 26 is.
  • the radial extent D of the damping body 36 corresponds approximately to 1.2 to 1.5 times the minimum radial extent T of the handle 21 at its free end 26 to form a circumferential bead.
  • the individual damping elements together form a multi-stage damping device for the power tool 11, which forms a high turn-off protection and thus high protection against damage to the power tool 11.
  • an advantageous damping of the vibrations generated by the power tool is also given.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP08104131.1A 2007-07-27 2008-05-28 Machine-outil avec amortisseur Withdrawn EP2018937A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007000408A DE102007000408A1 (de) 2007-07-27 2007-07-27 Handwerkzeuggerät

Publications (2)

Publication Number Publication Date
EP2018937A2 true EP2018937A2 (fr) 2009-01-28
EP2018937A3 EP2018937A3 (fr) 2013-10-23

Family

ID=39884669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08104131.1A Withdrawn EP2018937A3 (fr) 2007-07-27 2008-05-28 Machine-outil avec amortisseur

Country Status (3)

Country Link
US (1) US7878264B2 (fr)
EP (1) EP2018937A3 (fr)
DE (1) DE102007000408A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220117157A1 (en) * 2019-06-04 2022-04-21 Kubota Corporation Work vehicle

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9050714B2 (en) * 2009-06-25 2015-06-09 Construction Tools Pc Ab Hand-held demolition tool
US9004190B2 (en) 2011-08-26 2015-04-14 Ronald J. Zorn Hand held material moving tool
US9849577B2 (en) 2012-02-03 2017-12-26 Milwaukee Electric Tool Corporation Rotary hammer
US9308636B2 (en) 2012-02-03 2016-04-12 Milwaukee Electric Tool Corporation Rotary hammer with vibration dampening
JP6125392B2 (ja) * 2013-09-27 2017-05-10 株式会社マキタ 打撃工具
GB201518088D0 (en) * 2015-10-13 2015-11-25 Black & Decker Inc Pavement Breaker
EP3697574A1 (fr) 2017-10-20 2020-08-26 Milwaukee Electric Tool Corporation Outil à percussion
US11059155B2 (en) 2018-01-26 2021-07-13 Milwaukee Electric Tool Corporation Percussion tool
EP3766639A1 (fr) * 2019-07-18 2021-01-20 Hilti Aktiengesellschaft Machine-outil manuelle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3824417A (en) 1973-03-19 1974-07-16 Black & Decker Mfg Co Handle mounting construction for electric paving breaker

Family Cites Families (23)

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Publication number Priority date Publication date Assignee Title
US1596252A (en) * 1925-12-01 1926-08-17 Ingersoll Rand Co Cushion handle
US2101869A (en) * 1934-11-27 1937-12-14 Sullivan Machinery Co Vibration reducing means
US2062817A (en) * 1934-11-27 1936-12-01 Sullivan Machinery Co Rock drill
US2531800A (en) * 1947-11-22 1950-11-28 Ingersoll Rand Co Cushioning device for rock drill handles
US2831463A (en) * 1955-07-07 1958-04-22 Atlas Copco Ab Cushioning device for hammer tools
US3934657A (en) * 1974-08-01 1976-01-27 Thor Power Tool Company Dual safety control means for a power tool
US4416166A (en) * 1982-03-30 1983-11-22 Oakley, Inc. Handle grip
SE446698B (sv) * 1983-09-16 1986-10-06 Atlas Copco Ab "handhallet maskinverktyg innefattande ett motorhus och tva pa huset monterade handtag av vilka atminstone det ena er instellbart anordnat"
DE3410669A1 (de) * 1984-03-23 1985-10-24 Metabowerke GmbH & Co, 7440 Nürtingen Daempfungselement und dessen einbau in ein motorisch angetriebenes handwerkzeug
SE442963B (sv) * 1984-05-07 1986-02-10 Atlas Copco Ab Vibrationsisolerande handtag
SE467690B (sv) * 1990-12-11 1992-08-31 Atlas Copco Tools Ab Vibrationsisolerat verktygshandtag
US5125286A (en) * 1991-02-19 1992-06-30 Ken Wilson Handlebar handgrip
US5273120A (en) * 1993-05-26 1993-12-28 Ingersoll-Rand Company Power tool with a vibration absorbing handle
FR2714863B1 (fr) * 1994-01-11 1996-03-29 Facom Manche d'outil.
SE504957C2 (sv) * 1994-02-28 1997-06-02 Berema Atlas Copco Ab Maskinspett med handtagsförsett bakstycke
US5697456A (en) * 1995-04-10 1997-12-16 Milwaukee Electric Tool Corp. Power tool with vibration isolated handle
DE19631517A1 (de) * 1996-08-03 1998-02-05 Wacker Werke Kg Von einem Elektromotor angetriebenes, an Einphasenwechselstrom anschließbares, drehzahlvariables, handgehaltenes Elektrowerkzeug
US5992540A (en) * 1998-03-06 1999-11-30 Snap-On Tools Company Air ratchet hand tool with thermoplastic jacket
US5934154A (en) * 1998-03-06 1999-08-10 Noel; Ron Handgrip with protective endcap
US6082468A (en) * 1998-04-20 2000-07-04 Snap-On Tools Company Interchangeable grips for power hand tools
JP3861577B2 (ja) * 2000-09-08 2006-12-20 日立工機株式会社 打撃工具
EP1514648B1 (fr) * 2003-09-10 2013-11-20 Makita Corporation Manche sans vibration
DE102005000207A1 (de) * 2005-12-23 2007-06-28 Hilti Ag Handwerkzeuggerät mit gefederter Griffaufhängung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3824417A (en) 1973-03-19 1974-07-16 Black & Decker Mfg Co Handle mounting construction for electric paving breaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220117157A1 (en) * 2019-06-04 2022-04-21 Kubota Corporation Work vehicle
US11957074B2 (en) * 2019-06-04 2024-04-16 Kubota Corporation Work vehicle

Also Published As

Publication number Publication date
EP2018937A3 (fr) 2013-10-23
US20090032276A1 (en) 2009-02-05
US7878264B2 (en) 2011-02-01
DE102007000408A1 (de) 2009-01-29

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