EP1674210B1 - Outil avec poignée principale mécaniquement découplée - Google Patents

Outil avec poignée principale mécaniquement découplée Download PDF

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Publication number
EP1674210B1
EP1674210B1 EP20050111784 EP05111784A EP1674210B1 EP 1674210 B1 EP1674210 B1 EP 1674210B1 EP 20050111784 EP20050111784 EP 20050111784 EP 05111784 A EP05111784 A EP 05111784A EP 1674210 B1 EP1674210 B1 EP 1674210B1
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EP
European Patent Office
Prior art keywords
hand
power tool
oscillating
operated power
tool according
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.)
Active
Application number
EP20050111784
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German (de)
English (en)
Other versions
EP1674210A1 (fr
Inventor
Axel Fischer
Michael Weber
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
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Publication date
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP1674210A1 publication Critical patent/EP1674210A1/fr
Application granted granted Critical
Publication of EP1674210B1 publication Critical patent/EP1674210B1/fr
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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

Definitions

  • the invention relates to a hand-held tool device, such as a Behr, chisel or grinding device or a lifting saw, according to the preamble of claim 1.
  • Such tool devices form a vibration system that is excited by the drive assembly during operation. Due to the partial decoupling of the main handle while occurring at this vibration are significantly reduced. In this way, the comfort in holding the device is improved, which in turn allows longer work without fatigue of the operator.
  • a machine tool with vibration-damped main handle known. This has between the machine housing and the main handle on a parallel rocker, which is formed by two spaced-apart parallel leaf springs.
  • the leaf springs are aligned substantially perpendicular to a longitudinal axis of the machine tool and thus cause a positionally positive guidance of the handle in the direction of this longitudinal axis. In this way, the main handle is decoupled in the direction of the longitudinal axis vibrationally by the machine tool.
  • From the DE 38 39 207 is a portable handset with percussion known in which the main handle is movably held against two on the device housing rotatably mounted oscillating arms against a biased to the longitudinal axis of the device spring.
  • the main handle In addition to the displacement in the direction of the longitudinal axis for isolating the vibrations along a main axis of vibration, in this storage, a movement of the main handle in the transverse direction to the longitudinal axis against the spring force is provided.
  • this hand-held device is the complicated structure of the decoupling device, which leads to relatively high production costs.
  • this storage mode of the main handle in all directions is relatively soft, so that in operation no exact guidance of the handset is possible.
  • a hand-held tool device has a drive arrangement and a main handle which is decoupled via a decoupling device, wherein the decoupling device has two oscillating elements which are spaced apart from one another and deflectable transversely to the striking axis and which extend parallel to the striking axis.
  • the present invention has for its object to avoid the disadvantages mentioned in a hand-held tool device and to increase the conditions comfort with low production costs.
  • the object is achieved by a hand-held tool device according to the independent claim 1.
  • Fig. 1 shows a hand-held tool device 2 in the form of a combined drill chisel device having a device housing 4, in which a drive assembly 6 is arranged with a housed in a motor housing 8 engine 10 and a drivable by the engine 10, housed in a gear housing 12 transmission 14.
  • a tool-side end 16 of the drive assembly 6 this is coupled via a spindle 20 with a tool holder 18, which is thereby drivable rotationally and / or translationally by means of the drive assembly 6 along a working axis A and on which a tool 22 in the form of a drill or Meisselbits attachable.
  • a handle member 26 is provided which forms an ergonomically shaped, rubberized main handle 28.
  • the handle element 26 is connected at its two ends via end webs 32 with a perpendicular to the working axis A support web 34.
  • the gripping element 26 is held on the drive arrangement 6 via a decoupling device designated overall by 36.
  • the decoupling device 36 has two L-shaped leaf springs 38.
  • a first leg of the leaf springs 38, which acts as a vibrating element 40, is at its free end in each case via fastening means 42, for example in the form of screw, on the gear housing 12 or on the motor housing 8 or alternatively to the illustrated embodiment on a combined motor Gearbox housing attached.
  • the oscillating element 40 is connected at both leaf springs 38 with a perpendicular transverse oscillating element 44, which is fastened at its free end via further fastening means 42 to a profiling 46, which is formed on the carrier web 34 and is directed in the direction of the drive assembly 6.
  • the two oscillating elements 40 are each held at the level of one of the end webs 32, so that the main handle 28 is disposed completely between respective extensions 48 of the oscillating elements 40.
  • the two oscillating elements 40 are aligned parallel to each other.
  • the two leaf springs 38 are formed identically, whereby in operation a matching deformation and thus a particularly uniform positive guidance of the main handle 28 relative to the drive assembly 6 is achieved.
  • the leaf springs 38 each in terms their shape and material properties, for example, to adapt to the individual circumstances of the respective tool device 2.
  • the leaf springs 38 can also be offset against the illustrated embodiment offset from one another on the tool device 2.
  • the power tool 2 has a center of mass S at a distance a to the working axis A.
  • the main handle 28 Upon excitation of the spindle 20 along the working axis A, such as in particular at a recurrent pulse-like acceleration to produce a striking motion, the main handle 28 is therefore in operation in addition to a vibrational motion in a first direction of vibration Z, which is parallel to the working axis A, in a second Vibration direction Y moves along, that is aligned approximately parallel to the longitudinal extent of the main handle 28.
  • the oscillating elements 40 of the leaf springs 38 can be deflected in operation in the direction of vibration Y to decouple the handle member 26 with the main handle 28 vibrationally transverse to the working axis A of the drive assembly 6.
  • the two oscillating elements 40 maintain their parallel alignment with each other.
  • the decoupling device 36 in operation on a parallel kinematics, which allows in particular in the direction of vibration Y relative movement of the handle member 26 relative to the drive assembly 6, but this is forcibly guided in a fixed position manner, so that the handle member 26 its orientation relative to the rest of the tool device. 2 maintains.
  • transverse oscillating elements 44 cause an almost complete oscillation-decoupling of the grip element 26 in the oscillation direction Z.
  • the leaf springs bores 47 for receiving the fastening means 42 and recesses 49, over which an optimal compliance of the leaf springs 38 is adjustable. Further, the leaf springs 38 in a vibration direction X, which is perpendicular to the vibration directions Y and Z, a relatively large width B, through which the decoupling device 36 relative to the vibration direction X is relatively strong stiffened.
  • the tool device 2 can be guided particularly accurately and safely by an operator at the main handle 28 with minimized vibrations.
  • each have a stopper body 50 is provided adjacent to the leaf springs 38 adjacent to the leaf springs 38.
  • the profiling 46 forms a third contact surface 57, which likewise encloses the angle ⁇ of at most 20 ° with the transverse oscillating element 44 in the unloaded state.
  • the stopper body 50 has a base body 55 formed for example of plastic. At the contact surfaces 52, 54 this is coated with a contact material 56, which optionally has a relation to the main body increased frictional resistance and, for example, also made of plastic or an elastomer is formed.
  • both the deflection of the vibrating element 40 and the transverse oscillating element 44 is limited to the angle ⁇ or ⁇ to the leaf springs 38 to ensure safe management of the power tool 2 under extreme operating conditions and possible damage to the decoupling device 36 to avoid. In this case, excessive contact with the contact surfaces 52, 54 can be prevented by the contact material 56.

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

Claims (10)

  1. Appareil à guidage manuel (2), comprenant un agencement d'entraînement (6) qui est logé dans un carter d'appareil (4), lequel comporte une extrémité côté outil (16), au niveau de laquelle un raccord d'outil (18) peut être entraîné suivant un axe de travail (A) par l'agencement d'entraînement (6), et une extrémité côté poignée (24) qui est située à l'opposé de l'extrémité côté outil (16) et sur laquelle est disposée une poignée principale (28), laquelle est destinée à tenir l'appareil (2), s'étend transversalement à l'axe de travail (A) et est reliée à l'agencement d'entraînement (6) par l'intermédiaire d'un dispositif de découplage (36) pour le découplage vibratoire partiel de la poignée principale (28), le dispositif de découplage (36) comportant deux éléments oscillants (40) qui sont distants l'un de l'autre et déviables par rapport à l'axe de travail (A) et qui s'étendent chacun entre l'agencement d'entraînement (6) et la poignée principale (28) suivant une direction parallèle à l'axe de travail (A), caractérisé en ce que, outre une première direction d'oscillation Z parallèle à l'axe de travail A, les éléments oscillants (40) possèdent également une seconde direction d'oscillation perpendiculaire Y qui est orientée suivant l'extension longitudinale de la poignée principale 28, aucun déplacement relatif n'étant possible dans une troisième direction d'oscillation X.
  2. Appareil à guidage manuel selon la revendication 1, caractérisé en ce que les éléments oscillants sont déviables parallèlement l'un à l'autre.
  3. Appareil à guidage manuel selon la revendication 1 ou 2, caractérisé en ce que la poignée principale (28) est disposée entre les prolongements (48) de l'extension longitudinale de chacun des éléments oscillants (40).
  4. Appareil à guidage manuel selon une des revendications 1 à 3, caractérisé en ce que les éléments oscillants (40) sont reliés chacun à un élément oscillant transversal (44) qui est déviable transversalement à l'extension de la poignée principale (28).
  5. Appareil à guidage manuel selon la revendication 4, caractérisé en ce qu'un des éléments oscillants (40) et un des éléments oscillants transversaux (44) sont conformés respectivement en première branche et en seconde branche d'un ressort à lame plié commun (38).
  6. Appareil à guidage manuel selon la revendication 5, caractérisé en ce qu'à côté d'au moins un des ressorts à lames (38) est prévu un corps de butée (50) qui limite aussi bien la déviabilité de l'élément oscillant que celle de l'élément oscillant transversal.
  7. Appareil à guidage manuel selon la revendication 6, caractérisé en ce que le corps de butée (50) comporte, pour appliquer l'élément oscillant (40), une première surface de contact (52) qui forme avec l'élément oscillant (40) un angle (α) d'au plus 20°.
  8. Appareil à guidage manuel selon la revendication 7, caractérisé en ce que le corps de butée (50) comporte, pour appliquer l'élément oscillant transversal (44), une seconde surface de contact (54) qui forme avec l'élément oscillant transversal (44) un angle (β) d'au plus 20°.
  9. Appareil à guidage manuel selon une des revendications 6 à 8, caractérisé en ce que le corps de butée (50) comporte un corps de base (55) en matière plastique ou en élastomère.
  10. Appareil à guidage manuel selon une des revendications 6 à 9, caractérisé en ce que le corps de butée (50) comporte, dans la zone de la surface de contact (50 ; 54), un matériau de contact (56) avec une surface à faible frottement.
EP20050111784 2004-12-21 2005-12-07 Outil avec poignée principale mécaniquement découplée Active EP1674210B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200410061521 DE102004061521A1 (de) 2004-12-21 2004-12-21 Werkzeuggerät mit entkoppeltem Haupthandgriff

Publications (2)

Publication Number Publication Date
EP1674210A1 EP1674210A1 (fr) 2006-06-28
EP1674210B1 true EP1674210B1 (fr) 2008-04-09

Family

ID=36061660

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050111784 Active EP1674210B1 (fr) 2004-12-21 2005-12-07 Outil avec poignée principale mécaniquement découplée

Country Status (2)

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EP (1) EP1674210B1 (fr)
DE (2) DE102004061521A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1882558A1 (fr) 2006-07-27 2008-01-30 HILTI Aktiengesellschaft Outil à main doté d'un dispositif de découplage
EP2253430A1 (fr) 2009-05-20 2010-11-24 Friedrich Duss Maschinenfabrik GmbH & Co. KG Machine-outil électrique, notamment perceuse manuelle

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007000093A1 (de) 2007-02-15 2008-08-21 Hilti Ag Handwerkzeuggerät
DE102007062717A1 (de) * 2007-12-27 2009-07-02 Robert Bosch Gmbh Zusatzhandgriffvorrichtung
EP2181810A1 (fr) * 2008-10-30 2010-05-05 AEG Electric Tools GmbH Outil électrique à vibrations amorties
DE102011082093A1 (de) * 2011-09-02 2013-03-07 Robert Bosch Gmbh Handgriffvorrichtung für eine Handwerkzeugmaschine

Family Cites Families (5)

* 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
DE3505181A1 (de) * 1985-02-15 1986-08-21 Hilti Ag, Schaan Schwingungen erzeugendes handwerkzeug
DE4124574A1 (de) * 1991-07-24 1993-01-28 Wolf Woco & Co Franz J Griffisolierung
DE29700003U1 (de) * 1997-01-02 1997-02-27 Wacker Werke Kg Aufbruch- und/oder Bohrhammer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1882558A1 (fr) 2006-07-27 2008-01-30 HILTI Aktiengesellschaft Outil à main doté d'un dispositif de découplage
EP2253430A1 (fr) 2009-05-20 2010-11-24 Friedrich Duss Maschinenfabrik GmbH & Co. KG Machine-outil électrique, notamment perceuse manuelle
DE102009022088A1 (de) 2009-05-20 2010-11-25 Friedrich Duss Maschinenfabrik Gmbh & Co.Kg Elektrowerkzeugmaschine, insbesondere handgeführter Bohrhammer

Also Published As

Publication number Publication date
EP1674210A1 (fr) 2006-06-28
DE102004061521A1 (de) 2006-06-29
DE502005003639D1 (de) 2008-05-21

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