EP1817139B1 - Systeme de prehension de machine-outil portative pourvu d'une unite antivibrations - Google Patents

Systeme de prehension de machine-outil portative pourvu d'une unite antivibrations Download PDF

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Publication number
EP1817139B1
EP1817139B1 EP05743127A EP05743127A EP1817139B1 EP 1817139 B1 EP1817139 B1 EP 1817139B1 EP 05743127 A EP05743127 A EP 05743127A EP 05743127 A EP05743127 A EP 05743127A EP 1817139 B1 EP1817139 B1 EP 1817139B1
Authority
EP
European Patent Office
Prior art keywords
power tool
portable power
handle device
tool handle
force
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.)
Ceased
Application number
EP05743127A
Other languages
German (de)
English (en)
Other versions
EP1817139A1 (fr
Inventor
Hubert Steinke
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1817139A1 publication Critical patent/EP1817139A1/fr
Application granted granted Critical
Publication of EP1817139B1 publication Critical patent/EP1817139B1/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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 handheld power tool grip device having a vibration shielding unit according to the preamble of claim 1 and to a handheld power tool according to the preamble of claim 12.
  • Generic handheld power tool grip devices usually comprise a pivotably mounted about a pivot axis or equipped with at least two degrees of freedom grip element.
  • the invention relates to a hand tool gripping device with a vibration shielding and a
  • Guide device for guiding a movement of a relative to a hand tool body movably mounted handle member.
  • the movement is at least substantially rectilinear. It can thereby be achieved that impact pulses of a hand tool machine comprising the handheld power tool grip device are shielded via a rectilinear movement, preferably in the direction of the impact pulse, independently of a direction in which an operator applies a support force to the operating element. An immediate transmission of the impact pulse or a component thereof via a joint or via a pivotable mounting can be avoided. Furthermore, tilting and consequent tilting of the gripping element can be avoided without having to forego a robustness required in a construction site operation.
  • the vibration shielding unit can be designed as a resilient vibration shielding unit that reflects individual pulses of vibration back into the handheld power tool body and / or transmits low pass filtered from the handheld power tool body onto the grip element.
  • the vibration shielding unit may be implemented as a vibration damping or vibration absorbing unit capable of dissipating a registered vibration energy. Particularly advantageous embodiments of the invention, in which the vibration shielding a first portion of the vibration energy dissipates and reflects another portion of the vibrational energy.
  • the grip element is spaced from a housing of the power tool body.
  • blockage of the movement by dust particles and / or shavings which can become lodged between the grip element and the hand tool body can be avoided. Dirt, which can occur especially in a construction site, can be easily removed.
  • a conditional by the distance frame can be protected to avoid contamination by elastic and / or displaceably mounted in the direction of movement covering.
  • the handheld power tool grip device has at least two crossing force transmission elements. As a result, transverse forces exerted on the grip element can be supported particularly effectively.
  • a particularly secure guidance of the movement of the grip element can be achieved if the force transmission elements are pivotally connected to one another by a connecting element, in particular by the connecting element which is arranged in a central region of the force transmission elements, so that the force transmission elements can perform a scissor movement.
  • the connecting element can be particularly advantageously formed on at least one of the force transmission elements.
  • an always defined starting position can be achieved from which a particularly effective vibration shield can be reached.
  • a particularly comfortable vibration shielding can be achieved if the handheld power tool grip device comprises at least one elastically deformable shock absorption element.
  • cost saving potentials can be tapped if the return element and the shock absorption element are made in one piece.
  • impact-absorbing elements it is possible to use, for example, various elastomers that appear appropriate to a person skilled in the art, for example also with a foam rubber structure.
  • An impairment of the leadership properties of the power tool grip device by the restoring element can be avoided if the restoring element acts on at least one force transmission element, particularly advantageously on at least two power transmission elements. It can thereby be achieved that a force of the restoring element is strengthened or weakened by means of a lever effect and can be advantageously adapted to customer requirements by selecting a point of application of the force.
  • the grip element has a D-shape, a particularly advantageous handling of the handheld power tool can be achieved.
  • an on / off switch of the power tool can be protected against uncontrolled forces, for example due to impacts.
  • FIG. 1 shows a trained as a hammer hammer hand tool with a hand tool body 14, a tool chuck 34 and a clamped tool 36.
  • An integrated into the power tool body 14, not shown here striking mechanism is driven by a motor 38 of the hammer drill and generates axial impact pulses in a direction 40 on the tool 36.
  • the power tool body 14 On a side facing away from the tool 36, the power tool body 14 has a D-shaped grip element 16 with an on / off switch 42 arranged on an inner side of the grip element 16.
  • the grip element 16 is displaceably mounted on the hand tool body 14 in the working direction 40.
  • a movement 26 of the grip element 16 is guided by a guide device 12 in a straight line in the working direction 40, so that an operator can move the grip element 16 counter to a spring force relative to the hand tool body 14 in the working direction 40.
  • the spring force is generated by a vibration shielding unit 10 which, in addition to the guide device 12, comprises a restoring element 30 designed as a spiral spring ( FIG. 2 ).
  • FIG. 2 shows schematically a section through the handle member 16 and the vibration shielding unit 10.
  • the handle member 16 is spaced from a housing of the power tool body 14 at about 1 - 1.5 cm.
  • a gap between the handle member 16 and the hand tool body 14 is slidably supported by in the direction of movement 26, an edge of the power tool body 14 overlaps overlapping covering means.
  • the guide device 12 consists essentially of two intersecting force transmission elements 20, 22, which are formed as stamped / bent parts and which are connected in a central region by a bolt designed as a connecting element 24 like a scissor-like pivotally.
  • the right end of the rod-shaped power transmission elements 20, 22, these are each pivotally mounted on further bolts 44, 46, namely the first power transmission element 20 on a housing 18 of the power tool body 14 and the second power transmission element 22 on the handle element sixteenth
  • the left end is the first power transmission element 20 via a third pin 48 which engages in a direction perpendicular to the movement 26 and the working direction 40 elongated hole 54, slidably mounted on the handle member 16, wherein a direction 28 corresponds to the displacement of the direction of the elongated hole 54.
  • the second power transmission element 22 via a fourth pin 50 which engages in a direction perpendicular to the movement 26 and the working direction 40 aligned slot 56, slidably mounted in the direction of the elongated hole 56 on the housing 18.
  • the bolts 48, 50 move in their respective oblong holes 54, 56 perpendicular to the working direction 40 or to the movement 26 of the grip element 16 until the bolts 48, 50 move to a position in FIG FIG. 2 left end of the slots 54, 56 abut.
  • the movement 26 is limited in the working direction 40.
  • the right ends of the elongated holes 54, 56 limit the movement 26 against the working direction 40.
  • the power transmission members 20, 22 pivot about the connecting member 24, compressing or decompressing the compression spring of the vibration shield unit 10 and the return member 30 disposed between the connecting member 24 and the grip member 16, respectively.
  • the return element 30 generates the spring force of the vibration shielding unit 10.
  • the restoring element 30 sets the grip element 16 counter to the working direction 40 into a starting position defined by the left ends of the elongated holes 54, 56 with the greatest possible distance between the grip element 16 and the housing 18.
  • a shock pulse generated by the impact mechanism is at least partially reflected by a workpiece
  • the impact pulse can travel via the tool 36 and the tool chuck 34 into the housing 18 of the hand tool body 14, which thereby accelerates counter to the working direction 40.
  • an operator exerts a force on the grip element 16 that has at least one component in the working direction 40, it moves as a result of the reflected portion of the impact pulse the housing 18 against the force of the compression spring or the return element 30 in the direction of the handle member 16 which moves guided by the guide device 12 relative to the housing 18.
  • a force transmitted to the handle member 16 via the return member 30 slowly increases as compared with a timing of the beat pulse, and is supported by the operator so that the operator can intercept the shock pulse over a prolonged period of time.
  • the guide device 12 with the restoring element 30 acts as a vibration shielding unit 10, which filters out high-frequency components of a vibration of the hand tool body 14.
  • the restoring element 30 simultaneously serves as a shock absorbing element 32, embodiments of the invention are also conceivable in which a separate from the restoring element 30 shock absorbing element 32 is present.
  • FIG. 3 shows an alternative vibration shielding unit 10, in which the restoring element 30 is formed as a tension spring which engages in each case on a grip element 16 facing half of force transmission elements 20, 22.
  • the tension spring is in a starting position of the grip element 16 under a bias.
  • FIG. 4 shows an embodiment of the invention, in addition to the features of in FIG. 3 illustrated embodiment designed as a rubber component shock absorption element 32, which simultaneously forms a return element 30, and is arranged between a bolt formed as a connecting element 24 and a housing 18 of a device comprising hammer drill.
  • the return element 30 may be supported by a tension spring 52 shown in dashed lines in its effect.
  • Embodiments of the invention are conceivable in which a plurality of, in particular identical, vibration shielding units 10 are arranged over a longitudinal extent of the grip element 16. Furthermore, embodiments of the invention are conceivable with alternative impact absorption units which appear to the person skilled in the art to be sensible, for example with an inelastically deformable material or with hydraulic shock absorbers.

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

Claims (11)

  1. Système de préhension de machine-outil portative comprenant une unité antivibrations (10) et un dispositif de guidage (12) pour le guidage d'un mouvement (26) d'un élément de préhension (16) monté mobile par rapport à un corps de machine-outil portative (14), dont le mouvement (26) est au moins sensiblement linéaire, caractérisé en ce que le dispositif de guidage (12) comprend au moins deux éléments de transfert de force (20, 22) qui se croisent.
  2. Système de préhension de machine-outil portative selon la revendication 1, caractérisé en ce que l'élément de préhension (16) est espacé d'un boîtier (18) du corps de machine-outil portative (14).
  3. Système de préhension de machine-outil portative selon la revendication 1, caractérisé en ce que les éléments de transfert de force (20, 22) sont connectés l'un à l'autre de manière pivotante par un élément de connexion (24).
  4. Système de préhension de machine-outil portative selon la revendication 3, caractérisé en ce que l'élément de connexion (24) est disposé dans une région centrale d'au moins l'un des éléments de transfert de force (20, 22).
  5. Système de préhension de machine-outil portative selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un élément de transfert de force (20, 22) est monté de manière déplaçable sur au moins une extrémité dans une direction (28) s'étendant perpendiculairement à la direction de déplacement (26).
  6. Système de préhension de machine-outil portative selon les revendications 3 et 5, caractérisé en ce que chacun des éléments de transfert de force (20, 22) est monté de manière déplaçable à une extrémité.
  7. Système de préhension de machine-outil portative selon l'une quelconque des revendications précédentes, caractérisé par au moins un élément de rappel élastique (30) pour le rappel de l'élément de préhension (16).
  8. Système de préhension de machine-outil portative selon l'une quelconque des revendications précédentes, caractérisé par au moins un élément d'absorption des chocs (32) déformable élastiquement.
  9. Système de préhension de machine-outil portative selon les revendications 7 et 8, caractérisé en ce que l'élément de rappel (30) et l'élément d'absorption des chocs (32) sont réalisés d'une seule pièce.
  10. Système de préhension de machine-outil portative selon les revendications 3 et 7, caractérisé en ce que l'élément de rappel (30) vient en prise avec au moins un élément de transfert de force (20, 22).
  11. Machine-outil portative comprenant un système de préhension de machine-outil portative selon l'une quelconque des revendications précédentes.
EP05743127A 2004-08-26 2005-05-03 Systeme de prehension de machine-outil portative pourvu d'une unite antivibrations Ceased EP1817139B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004041219A DE102004041219A1 (de) 2004-08-26 2004-08-26 Handwerkzeugmaschinengriffvorrichtung mit einer Vibrationsabschirmeinheit
PCT/EP2005/052020 WO2006021466A1 (fr) 2004-08-26 2005-05-03 Systeme de prehension de machine-outil portative pourvu d'une unite antivibrations

Publications (2)

Publication Number Publication Date
EP1817139A1 EP1817139A1 (fr) 2007-08-15
EP1817139B1 true EP1817139B1 (fr) 2009-03-11

Family

ID=34967261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05743127A Ceased EP1817139B1 (fr) 2004-08-26 2005-05-03 Systeme de prehension de machine-outil portative pourvu d'une unite antivibrations

Country Status (5)

Country Link
US (1) US20080000664A1 (fr)
EP (1) EP1817139B1 (fr)
CN (1) CN101005928B (fr)
DE (2) DE102004041219A1 (fr)
WO (1) WO2006021466A1 (fr)

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GB2431610A (en) * 2006-03-03 2007-05-02 Black & Decker Inc Handle Damping System
CA2590879C (fr) * 2006-05-31 2015-02-17 Ingersoll-Rand Company Support structural pour batis a outils electriques
DE102006051924A1 (de) * 2006-11-03 2008-05-15 Robert Bosch Gmbh Handwerkzeugmaschine mit einem vibrationsgedämpften, mit einem Schalter versehenen Handgriff
DE102006052807A1 (de) 2006-11-09 2008-05-15 Robert Bosch Gmbh Handwerkzeugmaschine mit einem vibrationsgedämpften Bügelhandgriff
DE102007000093A1 (de) * 2007-02-15 2008-08-21 Hilti Ag Handwerkzeuggerät
DE102007042721A1 (de) * 2007-09-07 2009-03-12 Robert Bosch Gmbh Handwerkzeugmaschine mit einem durch ein Ausgleichsmittel schwingungsgedämpften Handgriff
DE102007054506A1 (de) * 2007-11-15 2009-05-20 Robert Bosch Gmbh Handgriff
US8756754B2 (en) 2008-12-11 2014-06-24 Husqvarna Ab Anti-vibration cantilevered handle for a blowing apparatus
JP5361504B2 (ja) 2009-04-10 2013-12-04 株式会社マキタ 打撃工具
DE102009002589A1 (de) * 2009-04-23 2010-10-28 Hilti Aktiengesellschaft Handwerkzeugmaschine
GB2482523A (en) * 2010-08-05 2012-02-08 Black & Decker Inc Hammer drill comprising rear handle with mounting assembly allowing rotation and linear movement
DE102010055673A1 (de) * 2010-12-22 2012-06-28 Andreas Stihl Ag & Co. Kg Handgeführtes Arbeitsgerät
US8966773B2 (en) 2012-07-06 2015-03-03 Techtronic Power Tools Technology Limited Power tool including an anti-vibration handle
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US12021437B2 (en) 2019-06-12 2024-06-25 Milwaukee Electric Tool Corporation Rotary power tool

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Also Published As

Publication number Publication date
CN101005928B (zh) 2013-02-13
DE502005006843D1 (de) 2009-04-23
EP1817139A1 (fr) 2007-08-15
DE102004041219A1 (de) 2006-03-02
CN101005928A (zh) 2007-07-25
WO2006021466A1 (fr) 2006-03-02
US20080000664A1 (en) 2008-01-03

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