EP2942158A1 - Machine-outil portative - Google Patents

Machine-outil portative Download PDF

Info

Publication number
EP2942158A1
EP2942158A1 EP14167638.7A EP14167638A EP2942158A1 EP 2942158 A1 EP2942158 A1 EP 2942158A1 EP 14167638 A EP14167638 A EP 14167638A EP 2942158 A1 EP2942158 A1 EP 2942158A1
Authority
EP
European Patent Office
Prior art keywords
handle
working axis
machine
cavity
along
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Withdrawn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
EP14167638.7A
Other languages
German (de)
English (en)
Inventor
Axel Fischer
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
Priority to EP14167638.7A priority Critical patent/EP2942158A1/fr
Priority to CN201580022831.1A priority patent/CN106457542A/zh
Priority to PCT/EP2015/057150 priority patent/WO2015169515A1/fr
Priority to US15/309,775 priority patent/US10654158B2/en
Priority to EP15713756.3A priority patent/EP3140081B1/fr
Publication of EP2942158A1 publication Critical patent/EP2942158A1/fr
Withdrawn legal-status Critical Current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
    • B25D17/04—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
    • 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
    • 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
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • B25D2222/69—Foamed polymers, e.g. polyurethane foam

Definitions

  • the present invention relates to a hand tool, such as from the DE 102010040094 A1 known.
  • the hand tool has a tool holder for holding a tool on a working axis and a striking mechanism, which has a periodically moved back and forth on the working axis rackets.
  • the striking mechanism is mounted in a machine housing.
  • a handle is attached to the machine housing by means of a damper.
  • the damper has a machine-side surface connected to the machine housing and a handle-side surface connected to the handle. Adjacent to the machine side surface and the handle side surface is a block of porous elastomer. An air filled cavity is provided within the block between the machine side surface and the handle side surface.
  • the cavities within the porous elastomer cause an increasing stiffness of the damper as the user's pressure increases.
  • the rigidity can be easily adapted to a desired characteristic.
  • the cavities located in the block prove to be sufficiently robust under continuous load, especially against abrasion.
  • Fig. 1 schematically shows a hammer drill 1 as an example of a chiseling hand tool .
  • the hammer drill 1 has a tool holder 2, in which a shank end 3 of a tool, for example one of the drill 4, can be used.
  • a primary drive of the hammer drill 1 is a motor 5, which drives a striking mechanism 6 and an output shaft 7 .
  • a battery pack 8 or a power line supplies the motor 5 with power.
  • a user can guide the hammer drill 1 by means of a handle 9 and be by means of a system switch 10 to the hammer drill 1 is in operation.
  • the hammer drill 1 rotates the drill 4 continuously about a working axis 11 and can beat the drill 4 in the direction of impact 12 along the working axis 11 in a substrate.
  • the percussion 6 is a pneumatic percussion 6.
  • An exciter piston 13 and a racket 14 are movably guided in a guide tube 15 in the striking mechanism 6 along the working axis 11 .
  • the excitation piston 13 is coupled via an eccentric 16 to the motor 5 and forced to a periodic, linear movement.
  • a connecting rod 17 connects the eccentric 16 with the excitation piston 13.
  • An air spring formed by a pneumatic chamber 18 between the excitation piston 13 and the racket 14 couples a movement of the racket 14 to the movement of the exciter piston 13 .
  • the racket 14 can strike directly on a rear end of the drill 4 or indirectly transmit a portion of its pulse to the drill 4 via a substantially resting intermediate racket 19 .
  • the striking mechanism 6 and preferably the further drive components are arranged within a machine housing 20 .
  • a recoil of the pneumatic impact mechanism 6 is transmitted to the handle 9 via the machine housing 20 .
  • the handle 9 is suspended by a damper 21 on the machine housing 20 to reduce the peak load of the recoil.
  • the damper 21 is in a section in Fig. 2 shown.
  • the damper 21 has a punch 22 which is rigidly secured to the handle 9 .
  • the punch 22 is arranged in a cage 23 which is rigidly fixed to the machine housing 20 .
  • the punch 22 is movable in the cage 23 along the working axis 11 .
  • the stamp 22 has an in Impact direction 12 facing punch surface 24 which faces a counter to the direction of impact 12 facing stop surface 25 of the cage 23 .
  • the two surfaces 24, 25 are preferably flat or, if bent, have the same curvature.
  • the punch surface 24 is substantially uniform over its entire surface to the stop surface 25 at a distance 26th
  • the damper 21 has a porous elastomer body 27 which is disposed between the punch 22 and the cage 23 .
  • the porous elastomer body 27 transmits a force from the handle 9 to the machine housing 20 in the direction of impact 12.
  • the porous elastomer body 27 has a buffer section 28 which bears against the stamp face 24 and against the opposite stop face 25 .
  • the dimensions of the buffer section 28 perpendicular to the working axis 11 are equal to the corresponding dimensions stamp face 24, which is connected here, for example, to the handle 9 .
  • the outer surface of the porous elastomer body 27 pointing in the direction of impact 12 is flush and completely against the stop surface 25, at least in the buffer section 28 .
  • the outer surface of the buffer section 28 pointing counter to the direction of impact 12 lies flush and completely against the stamp surface 24 .
  • the porous elastomer body 27, in particular the buffer portion 28, is compressed when the user presses the handle 9 in the direction of impact 12 .
  • the vibrations of the hammer drill 1 act on the porous elastomer body 27 in a dynamic manner.
  • the construction of the buffer portion 28 continuous with the punch surface 24 and the abutment surface 25 effectively prevents the buffer portion 28 from moving parallel to the punch surface 24 and the abutment surface 25 during the dynamic load changes.
  • porous elastomer body 27 in particular a rubber-free, open-pore elastomer body 27 which is preferred for damping .
  • the porous elastomer body 27 is preferably provided on its outer surfaces pointing perpendicular to the working axis 11 by an air gap 29 surround.
  • the air gap 29 is sufficiently dimensioned so that the porous elastomeric body 27 does not touch the cage 23 or another housing laterally when compressed due to the contact pressure of the user.
  • the porous elastomer body 27 preferably has a prismatic structure.
  • the porous elastomer body 27 has a constant cross section (FIG. Fig. 2 ).
  • the porous elastomer body 27 can thus be cut out of a cuboid by means of a water jet saw.
  • the illustrated porous elastomer body 27 has, for example, two air-filled cavities 30.
  • the cavities 30 are arranged within the buffer section 28, ie between the stamp surface 24 and the stop surface 25 .
  • the cavities 30 are within the buffer section 28 in the sense that they are not open to the stamp surface 24 or the stop surface 25 .
  • the cavity 30 is closed along the working axis 11 .
  • the cavity 30 may be open in a direction perpendicular to the working axis 11 .
  • the exemplified cavities 30 have a cylindrical shape with an elliptical cross section that extends through the entire porous elastomer body 27 .
  • the axes of the cavities 30 are hereby exemplarily parallel to the handle axis.
  • the largest dimension 31 of the cavity 30 along the working axis 11, here the smaller half-axis of the ellipse is between 20% and 50% of the distance 26 of the die surface 24 of the stop surface 25, so the axial outer dimension of the buffer portion 28.
  • the axial dimensions of the porous Elastomer body 27 are to be determined without external force on the damper 21 , in particular without pressing force of the user on the handle 9.
  • the cavities 30 are increasingly compressed until the opposite inner surfaces 32, 33 of the cavity 30 completely together come to the concern.
  • the rigidity of the buffer section 28 thereby increases with increasing contact pressure until the cavity 30 is closed.
  • the low-holding soft damper 21 transmits only a few vibrations when the user keeps the handle 9 loose. With increasing contact pressure more vibrations are transmitted in principle, but also causes the arm of the user a natural damping. The last effect undergoes saturation, which is why, from an average holding force, a further increase in rigidity is detrimental to ergonomics.
  • the cavity 30 preferably has a constant cross-section along an axis.
  • the axis is perpendicular or inclined with respect to the working axis 11.
  • the cavity 30 is closed annularly in the cross section.
  • the cross-section has a dimension 31 along the working axis 11 and a dimension 34 perpendicular to the working axis 11.
  • the dimension 34 perpendicular to the working axis 11 is preferably at least twice as large as the dimension 31 along the working axis 11.
  • the opposing inner surfaces 32, 33 can touch, in particular the points originally along the working axis 11 farthest points, without causing cracking during the dynamic loads in the porous elastomer body 27 .
  • Fig. 3 illustrates the elastomer body 27 with differently shaped cavities 130.
  • the cavity 35 has a teardrop-shaped cross-section.
  • One of the cage 23 facing inner surface 36 and this opposite, the punch 22 facing inner surface 37th are essentially flat and converge to a peak.
  • the two inner surfaces 36, 37 are inclined relative to each other at an angle between 30 degrees and 90 degrees.
  • Opposite the tip, the two flat inner surfaces 36, 37 are connected by a semi-cylindrical inner surface.
  • An axis of the drop shape, ie from the tip to the half-cylinder, is perpendicular to the working axis 11.
  • a width 38 of the drop ie its dimension 34 along the working axis 11, is preferably in the range between 20% and 50% of the distance 26 of the die surface 24 of the stop surface 25.
  • the length 39 of the drop, ie along its axis through the tip is greater than the width 38, preferably at least twice as large.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP14167638.7A 2014-05-09 2014-05-09 Machine-outil portative Withdrawn EP2942158A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP14167638.7A EP2942158A1 (fr) 2014-05-09 2014-05-09 Machine-outil portative
CN201580022831.1A CN106457542A (zh) 2014-05-09 2015-04-01 手持式工具机
PCT/EP2015/057150 WO2015169515A1 (fr) 2014-05-09 2015-04-01 Machine-outil à main
US15/309,775 US10654158B2 (en) 2014-05-09 2015-04-01 Handheld power tool
EP15713756.3A EP3140081B1 (fr) 2014-05-09 2015-04-01 Machine-outil portative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14167638.7A EP2942158A1 (fr) 2014-05-09 2014-05-09 Machine-outil portative

Publications (1)

Publication Number Publication Date
EP2942158A1 true EP2942158A1 (fr) 2015-11-11

Family

ID=50678076

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14167638.7A Withdrawn EP2942158A1 (fr) 2014-05-09 2014-05-09 Machine-outil portative
EP15713756.3A Active EP3140081B1 (fr) 2014-05-09 2015-04-01 Machine-outil portative

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP15713756.3A Active EP3140081B1 (fr) 2014-05-09 2015-04-01 Machine-outil portative

Country Status (4)

Country Link
US (1) US10654158B2 (fr)
EP (2) EP2942158A1 (fr)
CN (1) CN106457542A (fr)
WO (1) WO2015169515A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3369530A1 (fr) * 2017-03-04 2018-09-05 Andreas Stihl AG & Co. KG Appareil de travail électrique à découplage de vibrations

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6620434B2 (ja) * 2015-06-12 2019-12-18 マックス株式会社 打撃工具
US12021437B2 (en) 2019-06-12 2024-06-25 Milwaukee Electric Tool Corporation Rotary power tool
JP2022128006A (ja) * 2021-02-22 2022-09-01 株式会社マキタ 打撃工具
US11919138B2 (en) * 2021-10-19 2024-03-05 Makita Corporation Impact tool

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19525251A1 (de) * 1994-07-12 1996-01-18 Makita Corp Vibrierendes Werkzeug und Vibrationsisolierring
EP1752257A2 (fr) * 2005-08-11 2007-02-14 HILTI Aktiengesellschaft Outil à main avec réduction de vibration
EP2050328A1 (fr) * 2007-10-18 2009-04-22 Andreas Stihl AG & Co. KG Appareil de travail manuel
WO2011049496A1 (fr) * 2009-10-23 2011-04-28 Husqvarna Ab Outil de travail à main
DE102010040094A1 (de) 2010-09-01 2012-03-01 Hilti Aktiengesellschaft Handwerkzeugmaschine

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5834271B2 (ja) * 1980-07-18 1983-07-26 日立工機株式会社 振動工具のハンドル防振装置
DE3410669A1 (de) * 1984-03-23 1985-10-24 Metabowerke GmbH & Co, 7440 Nürtingen Daempfungselement und dessen einbau in ein motorisch angetriebenes handwerkzeug
SE467635B (sv) * 1988-09-30 1992-08-17 Electrolux Ab Vibrationsdaempare i motorsaag
US4879847A (en) * 1989-03-13 1989-11-14 Snap-On Tools Corporation Cover for pneumatic tool
JPH08126975A (ja) * 1994-10-28 1996-05-21 Hitachi Koki Co Ltd 電気ハンマの防振ハンドル
DE19502171C2 (de) * 1995-01-25 2003-12-18 Stihl Maschf Andreas Handgeführtes Arbeitsgerät
DE19530712B4 (de) * 1995-08-21 2006-12-28 Fa. Andreas Stihl Antivibrationselement zur Anordnung zwischen einer Motoreinheit und einer Griffeinheit bei einem handgeführten Arbeitsgerät
FR2797208B1 (fr) * 1999-08-03 2002-10-18 Stihl Maschf Andreas Element antivibrations pourvu d'une surete d'arrachement
JP2002039267A (ja) * 2000-07-31 2002-02-06 Kioritz Corp 防振部材及び防振装置
GB2407789A (en) 2003-11-04 2005-05-11 Black & Decker Inc Vibration reduction apparatus for a power tool
US7694749B2 (en) * 2006-03-15 2010-04-13 Integrated Tool Solutions Llc Jackhammer with a lift assist
JP4626574B2 (ja) * 2006-06-16 2011-02-09 日立工機株式会社 電動工具
DE102007009169A1 (de) * 2007-02-26 2008-08-28 Robert Bosch Gmbh Handgriff
DE102007055735A1 (de) * 2007-03-29 2008-10-02 Robert Bosch Gmbh Handgriff
US7806201B2 (en) * 2007-07-24 2010-10-05 Makita Corporation Power tool with dynamic vibration damping
DE102007037047A1 (de) * 2007-08-06 2009-02-12 Robert Bosch Gmbh Zusatzhandgriffvorrichtung
DE102007037048A1 (de) * 2007-08-06 2009-02-12 Robert Bosch Gmbh Zusatzhandgriffvorrichtung
EP2119537A1 (fr) * 2008-05-17 2009-11-18 Metabowerke GmbH Machine-outil électrique manuelle
JP5214343B2 (ja) * 2008-06-19 2013-06-19 株式会社マキタ 作業工具
DE102009002970A1 (de) * 2009-05-11 2010-11-18 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere Elektrohandwerkzeugmaschine
CN201405334Y (zh) 2009-05-26 2010-02-17 江苏东成工具有限公司 一种具有减振装置的电动工具
US20120048580A1 (en) * 2010-09-01 2012-03-01 Hilti Aktiengesellschaft Power tool

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19525251A1 (de) * 1994-07-12 1996-01-18 Makita Corp Vibrierendes Werkzeug und Vibrationsisolierring
EP1752257A2 (fr) * 2005-08-11 2007-02-14 HILTI Aktiengesellschaft Outil à main avec réduction de vibration
EP2050328A1 (fr) * 2007-10-18 2009-04-22 Andreas Stihl AG & Co. KG Appareil de travail manuel
WO2011049496A1 (fr) * 2009-10-23 2011-04-28 Husqvarna Ab Outil de travail à main
DE102010040094A1 (de) 2010-09-01 2012-03-01 Hilti Aktiengesellschaft Handwerkzeugmaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3369530A1 (fr) * 2017-03-04 2018-09-05 Andreas Stihl AG & Co. KG Appareil de travail électrique à découplage de vibrations
CN108527267A (zh) * 2017-03-04 2018-09-14 安德烈·斯蒂尔股份两合公司 带有振动退耦的电气工作器械

Also Published As

Publication number Publication date
EP3140081B1 (fr) 2022-07-27
EP3140081A1 (fr) 2017-03-15
US20170144287A1 (en) 2017-05-25
WO2015169515A1 (fr) 2015-11-12
US10654158B2 (en) 2020-05-19
CN106457542A (zh) 2017-02-22

Similar Documents

Publication Publication Date Title
EP3140081B1 (fr) Machine-outil portative
EP1965952B1 (fr) Machine-outil a main pourvue d'un ensemble transmission et d'une unite de decouplage
EP1882559B1 (fr) Outil à main doté d'un dispositif de découplage
EP2729280B1 (fr) Dispositif à percussion
DE102010040173A1 (de) Handwerkzeugmaschine
EP3043967B1 (fr) Machine-outil manuelle
DE3505181A1 (de) Schwingungen erzeugendes handwerkzeug
DE102008001957A1 (de) Bohr- und/oder Meißelhammer
DE102006053105A1 (de) Handwerkzeugmaschinenschlagwerkvorrichtung
DE102005019710A1 (de) Handwerkzeugmaschinenschlagwerkeinheit
WO2007012527A1 (fr) Mecanisme de percussion et machine-outil portative a commande au moins par percussion, munie d'un mecanisme de percussion
EP2272630A2 (fr) Dispositif de marteau électrique
DE102011007433A1 (de) Handwerkzeugmaschinenvorrichtung
DE2933178C2 (fr)
EP3408058A1 (fr) Ensemble marteau
EP3052273B1 (fr) Machine-outil manuelle
EP2540452A1 (fr) Mécanisme de percussion pneumatique avec volumes d'amortisseur pneumatique séparés
DE10356928A1 (de) Schlagwerk, Kolbenvorrichtung und Werkzeugmaschine
DE810498C (de) Elektrohammer
AT501861B1 (de) Handgeführter, vibrationsgedämpfter drucklufthammer
WO2011000609A1 (fr) Dispositif de réduction et/ou compensation de vibrations, en particulier pour une machine-outil à main, destiné à être utilisé dans des machines-outils à main
DE102010040094A1 (de) Handwerkzeugmaschine
WO2019042869A1 (fr) Dispositif de marteau, de préférence dispositif de marteau à guidage manuel
AT507210B1 (de) Handgeführter drucklufthammer mit schaltbarer vibrationsdämpfung
DE968750C (de) Frei fliegend arbeitender Hammerkolben fuer Bohrhaemmer

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): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20160512