EP2017038A1 - Hand tool machine with pneumatic striking mechanism - Google Patents

Hand tool machine with pneumatic striking mechanism Download PDF

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Publication number
EP2017038A1
EP2017038A1 EP20080104123 EP08104123A EP2017038A1 EP 2017038 A1 EP2017038 A1 EP 2017038A1 EP 20080104123 EP20080104123 EP 20080104123 EP 08104123 A EP08104123 A EP 08104123A EP 2017038 A1 EP2017038 A1 EP 2017038A1
Authority
EP
European Patent Office
Prior art keywords
axis
hand tool
rotation
percussion
distance
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.)
Granted
Application number
EP20080104123
Other languages
German (de)
French (fr)
Other versions
EP2017038B1 (en
Inventor
Erwin Manschitz
Reinhard Schulz
Alexander Löffler
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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Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP2017038A1 publication Critical patent/EP2017038A1/en
Application granted granted Critical
Publication of EP2017038B1 publication Critical patent/EP2017038B1/en
Not-in-force 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
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/12—Means for driving the impulse member comprising a crank mechanism
    • B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/003—Crossed drill and motor spindles
    • 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
    • B25D2250/245—Spatial arrangement of components of the tool relative to each other
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18296—Cam and slide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18296—Cam and slide
    • Y10T74/18304—Axial cam
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18296—Cam and slide
    • Y10T74/18304—Axial cam
    • Y10T74/18312—Grooved

Definitions

  • the invention relates to a hand tool with pneumatic percussion referred to in the preamble of claim 1.
  • Such hand tool machines are z. B. formed as a chisel or combi hammer.
  • an electrically operated drill and / or Meisselhammer known which has an arranged in a device housing percussion, which is operable by a motor.
  • the hammer mechanism has a guided in a guide tube exciter element, such as an excitation piston, which is reciprocally movable by means of a connecting rod actuated by the motor.
  • the connecting rod is mounted eccentrically on an eccentric wheel at its end facing away from the piston, whose axis of rotation is stationary and which is driven by the motor.
  • the axis of rotation of the Excenterrades lies in a hammer mechanism defined by the impact mechanism.
  • the excitation element drives via an air cushion or an air spring also guided in the guide tube flying pistons, which exerts a striker on a front recorded in a tool holder tool.
  • an elastic mechanical compression spring is arranged in addition to the air or gas spring between the excitation piston and the flying piston.
  • the present invention has the object to optimize the pressure curve in the percussion in a structurally simple manner.
  • the axis of rotation of the eccentric wheel is arranged at a distance perpendicular to the striking axis.
  • the distance of the axis of rotation of the eccentric wheel to the impactor axis is in a range of 10% to 80% of the radius of the eccentric wheel, whereby a pressure drop in the percussion in the range of 2% (at 10% of the radius) to about 10% (at 80% of the radius) can be achieved.
  • the connecting rod is formed cranked, whereby collisions with the guide tube can be avoided in a technically simple manner.
  • the offset angle is preferably 5 ° to 45 °, depending on the existing construction conditions.
  • FIG. 1 a hand tool 10 embodied as a rotating and hammering combination hammer is shown, which has a housing 11 in which a percussion mechanism 20 acting on a tool 15 which can be arranged in a tool holder 14, a gear 13 and a motor 12 are arranged.
  • the striking mechanism 20 is coupled via a not visible in the figures output shaft with the transmission 13, which translates a rotational movement of the motor 12 and the output shaft on a Fig. 2 apparent Excenterrad 17 transmits, which is displaceable in rotation in a rotational direction 16.
  • the striking mechanism 20 has a guide tube 21, in which a exciter element 22 designed as an exciter piston is guided to be moved back and forth.
  • the guide tube 21 may be formed in two or more parts to simplify the assembly.
  • the excitation element 22 is connected to generate a lifting movement during operation of the power tool 10 via a pivotally mounted on this connecting rod 29 with the eccentric 17.
  • the connecting rod 29 is connected via an eccentrically arranged on the eccentric 17 pivot pin 18 with this, whereby a rotational movement of the eccentric 17 in the direction of rotation 16 is transformed into an oscillating stroke movement of the excitation element 22.
  • the eccentric 17 rotates about a central axis of rotation D.
  • the guide tube 21 In the guide tube 21 are also still a Anvil 24 and designed as a flying piston impact element 23 mounted axially displaceable.
  • the striking element 23 is also displaceable via the excitation piston and the air spring 25 located between it and the excitation element 22 in an oscillating stroke movement.
  • the striking element 23 strikes in the impact mode of the power tool 10 on the striker 24, which in turn on the tool 15 (off Fig. 1 ) suggests.
  • the striking element 23 strikes directly on the end of a tool.
  • the air spring 25 or gas spring (depending on the gas or gas mixture used) between the excitation element 22 and the striking element 23 can be switched on and off via switching means (not shown in the figures).
  • the percussion mechanism 20 defines a central percussion axis S which runs centrally through the guide tube 21 and the elements (exciter element 22, etc.) moved therein.
  • the axis of rotation D of the Excenterrades 17 is offset perpendicular to the percussion axis S by a distance X, whereby the pressure curve in the hammer mechanism 20 during a working reduced but still achieved the same single impact energy or at the same maximum pressure, a higher single impact energy is achieved.
  • the axis of rotation D is in the present example, in which the direction of rotation 16 of the eccentric 17 is rotating clockwise, based on the direction of impact 19 of the percussion mechanism 20 to the right out of the percussion axis S adoptedverlagert. In a counterclockwise rotating striking mechanism, however, the axis of rotation D of the eccentric wheel 17 would be displaced exactly opposite from the striking mechanism axis S.
  • the distance X corresponds to 0.1 to 0.8 times the radius RE of the Excenterrades 17th
  • the relative to the percussion axis S axial distance A of the two possible crossing points (indicated by the dotted circles 31, 32) of the journal 18 by the percussion axis S upon rotation of the eccentric 17 is less than twice the radial distance RL of the journal 18 to the rotation axis D. of the Excenterrades 17.
  • the connecting rod 29 is preferably formed cranked wherein the offset angle K is preferably between 5 ° and 45 °.

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

Abstract

The hand-held machine tool has a pneumatic striking mechanism (20) driven by an engine. An axis of rotation (D) of an eccentric wheel (17) is formed at a distance (X) perpendicular to the striking axis (S). The distance of the axis of rotation of the eccentric wheel to the striking axis lies in an area of 10 to 80 percent of the radius (RE) of the eccentric wheel.

Description

Die Erfindung betrifft eine Handwerkzeugmaschine mit pneumatischem Schlagwerk der im Oberbegriff von Patentanspruch 1 genannten Art. Derartige Handwerkzeugmaschinen sind z. B. als Meissel- oder Kombihammer ausgebildet.The invention relates to a hand tool with pneumatic percussion referred to in the preamble of claim 1. Art. Such hand tool machines are z. B. formed as a chisel or combi hammer.

Aus der EP 1 584 422 A1 ist ein elektrisch betriebener Bohr- und/oder Meisselhammer bekannt, der ein in einem Gerätegehäuse angeordnetes Schlagwerk aufweist, das über einen Motor betreibbar ist. Das Schlagwerk weist dabei ein in einem Führungsrohr geführtes Erregerelement, wie einen Erregerkolben, auf, das mittels eines vom Motor betätigbaren Pleuels hin- und hergehend bewegbar ist. Der Pleuel ist dazu an seinem dem Kolben abgewandten Ende exzentrisch an einem Excenterrad gelagert, dessen Drehachse ortsfest ist und das vom Motor angetrieben ist. Die Drehachse des Excenterrades liegt dabei in einer durch das Schlagwerk definierten Schlagwerksachse. Das Erregerelement treibt über ein Luftpolster bzw. eine Luftfeder einen ebenfalls in dem Führungsrohr geführten Flugkolben an, der über einen Döpper Schläge auf ein vorne in einem Werkzeughalter aufgenommenes Werkzeug ausübt. Um Druckspitzen im Schlagwerk zu reduzieren ist zusätzlich zur Luft- bzw. Gasfeder zwischen dem Erregerkolben und dem Flugkolben eine elastische mechanische Druckfeder angeordnet. Ein derartiges Schlagwerk ist robust und leistungsstark.From the EP 1 584 422 A1 is an electrically operated drill and / or Meisselhammer known which has an arranged in a device housing percussion, which is operable by a motor. The hammer mechanism has a guided in a guide tube exciter element, such as an excitation piston, which is reciprocally movable by means of a connecting rod actuated by the motor. The connecting rod is mounted eccentrically on an eccentric wheel at its end facing away from the piston, whose axis of rotation is stationary and which is driven by the motor. The axis of rotation of the Excenterrades lies in a hammer mechanism defined by the impact mechanism. The excitation element drives via an air cushion or an air spring also guided in the guide tube flying pistons, which exerts a striker on a front recorded in a tool holder tool. In order to reduce pressure peaks in the striking mechanism, an elastic mechanical compression spring is arranged in addition to the air or gas spring between the excitation piston and the flying piston. Such a striking mechanism is robust and powerful.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, den Druckverlauf im Schlagwerk auf konstruktiv einfache Weise zu optimieren.The present invention has the object to optimize the pressure curve in the percussion in a structurally simple manner.

Diese Aufgabe wird erfindungsgemäss durch die in Anspruch 1 genannten Massnahmen erreicht. Demnach ist die Drehachse des Excenterrades in einem Abstand senkrecht zur Schlagachse angeordnet. Durch diese Massnahme wird der Druckverlauf im Schlagwerk während eines Arbeitshubes vermindert aber trotzdem die gleiche Einzelschlagenergie erzielt bzw. bei gleichem Maximaldruck eine höhere Einzelschlagenergie erreicht.This object is achieved according to the invention by the measures mentioned in claim 1. Accordingly, the axis of rotation of the eccentric wheel is arranged at a distance perpendicular to the striking axis. By this measure, the pressure curve in the percussion during a working stroke is reduced but still achieved the same single impact energy or achieved at the same maximum pressure a higher single impact energy.

Von Vorteil ist es dabei, wenn der Abstand der Drehachse des Excenterrades zur Schlagwerksachse in einem Bereich von 10% bis 80% des Radius des Excenterrades liegt, wodurch eine Druckabsenkung im Schlagwerk im Bereich von 2% (bei 10% des Radius) bis ca. 10% (bei 80% des Radius) erzielt werden kann.It is advantageous if the distance of the axis of rotation of the eccentric wheel to the impactor axis is in a range of 10% to 80% of the radius of the eccentric wheel, whereby a pressure drop in the percussion in the range of 2% (at 10% of the radius) to about 10% (at 80% of the radius) can be achieved.

Vorteilhaft ist der Pleuel gekröpft ausgebildet, wodurch, wodurch Kollisionen mit dem Führungsrohr auf technisch einfache Weise vermieden werden können. Der Kröpfungswinkel beträgt dabei vorzugsweise 5° bis 45°, je nach den vorliegenden Bauverhältnissen.Advantageously, the connecting rod is formed cranked, whereby collisions with the guide tube can be avoided in a technically simple manner. The offset angle is preferably 5 ° to 45 °, depending on the existing construction conditions.

In den Zeichnungen ist die Erfindung in einem Ausführungsbeispiel dargestellt.In the drawings, the invention is shown in one embodiment.

Es zeigen:

Fig.1 1
eine erfindungsgemässe Handwerkzeugmaschine mit einem pneumatischen Schlagwerk;
Fig. 2
ein Detail der Handwerkzeugmaschine im Schnitt gemäss der Linie II - II aus Fig. 1.
Show it:
Fig.1 1
an inventive power tool with a pneumatic impact mechanism;
Fig. 2
a detail of the power tool in section according to the line II - II off Fig. 1 ,

In Figur 1 ist eine als drehender und schlagender Kombihammer ausgebildete Handwerkzeugmaschine 10 wiedergegeben, die ein Gehäuse 11 aufweist, in dem ein auf ein in einer Werkzeugaufnahme 14 anordnenbares Werkzeug 15 einwirkendes Schlagwerk 20, ein Getriebe 13 und ein Motor 12 angeordnet sind. Das Schlagwerk 20 ist über eine in den Figuren nicht sichtbare Abtriebswelle mit dem Getriebe 13 gekoppelt, welches eine Rotationsbewegung des Motors 12 übersetzt und über die Abtriebswelle auf ein aus Fig. 2 ersichtliches Excenterrad 17 überträgt, das in einer Drehrichtung 16 in Rotation versetzbar ist.In FIG. 1 a hand tool 10 embodied as a rotating and hammering combination hammer is shown, which has a housing 11 in which a percussion mechanism 20 acting on a tool 15 which can be arranged in a tool holder 14, a gear 13 and a motor 12 are arranged. The striking mechanism 20 is coupled via a not visible in the figures output shaft with the transmission 13, which translates a rotational movement of the motor 12 and the output shaft on a Fig. 2 apparent Excenterrad 17 transmits, which is displaceable in rotation in a rotational direction 16.

In Figur 2 ist das erfindungsgemässe Schlagwerk 20 dargestellt. Das Schlagwerk 20 weist ein Führungsrohr 21 auf, in dem ein als Erregerkolben ausgebildetes Erregerelement 22 hin und her bewegbar geführt ist. Das Führungsrohr 21 kann zur Vereinfachung der Montage auch zwei- oder mehrteilig ausgebildet sein. Das Erregerelement 22 ist zur Erzeugung einer Hubbewegung im Betrieb der Handwerkzeugmaschine 10 über ein schwenkbar an diesem gelagertes Pleuel 29 mit dem Excenterrad 17 verbunden. Der Pleuel 29 ist dabei über eine exzentrisch an dem Excenterrad 17 angeordneten Lagerzapfen 18 mit diesem verbunden, wodurch eine Rotationsbewegung des Excenterrades 17 in Drehrichtung 16 in eine oszillierende Hubbewegung des Erregerelements 22 transformiert wird. Das Excenterrad 17 rotiert dabei um eine zentrische Drehachse D. In dem Führungsrohr 21 sind ferner noch ein Döpper 24 und ein als Flugkolben ausgebildetes Schlagelement 23 axial versetzbar gelagert. Das Schlagelement 23 ist dabei über den Erregerkolben und die zwischen ihm und dem Erregerelement 22 liegende Luftfeder 25 ebenfalls in eine oszillierende Hubbewegung versetzbar. Das Schlagelement 23 schlägt dabei im Schlag-Betrieb der Handwerkzeugmaschine 10 auf den Döpper 24, der seinerseits auf das Werkzeug 15 (aus Fig. 1) schlägt. Alternativ schlägt das Schlagelement 23 direkt auf das Ende eines Werkzeuges. Die Luftfeder 25 bzw. Gasfeder (je nach dem eingesetzten Gas oder Gasgemisch) zwischen dem Erregerelement 22 und dem Schlagelement 23 kann dabei über Schaltmittel (in den Figuren nicht dargestellt) an- und abschaltbar ausgebildet sein.In FIG. 2 the striking mechanism 20 according to the invention is shown. The percussion mechanism 20 has a guide tube 21, in which a exciter element 22 designed as an exciter piston is guided to be moved back and forth. The guide tube 21 may be formed in two or more parts to simplify the assembly. The excitation element 22 is connected to generate a lifting movement during operation of the power tool 10 via a pivotally mounted on this connecting rod 29 with the eccentric 17. The connecting rod 29 is connected via an eccentrically arranged on the eccentric 17 pivot pin 18 with this, whereby a rotational movement of the eccentric 17 in the direction of rotation 16 is transformed into an oscillating stroke movement of the excitation element 22. The eccentric 17 rotates about a central axis of rotation D. In the guide tube 21 are also still a Anvil 24 and designed as a flying piston impact element 23 mounted axially displaceable. The striking element 23 is also displaceable via the excitation piston and the air spring 25 located between it and the excitation element 22 in an oscillating stroke movement. The striking element 23 strikes in the impact mode of the power tool 10 on the striker 24, which in turn on the tool 15 (off Fig. 1 ) suggests. Alternatively, the striking element 23 strikes directly on the end of a tool. The air spring 25 or gas spring (depending on the gas or gas mixture used) between the excitation element 22 and the striking element 23 can be switched on and off via switching means (not shown in the figures).

Das Schlagwerk 20 definiert eine zentrale Schlagwerksachse S die zentrisch durch das Führungsrohr 21 und die in diesem bewegten Elemente (Erregerelement 22 etc.) verläuft. Die Drehachse D des Excenterrades 17 ist senkrecht zu der Schlagwerksachse S um einen Abstand X versetzt, wodurch der Druckverlauf im Schlagwerk 20 während eines Arbeitshubes vermindert aber trotzdem die gleiche Einzelschlagenergie erzielt bzw. bei gleichem Maximaldruck eine höhere Einzelschlagenergie erreicht wird. Die Drehachse D ist dabei in dem vorliegenden Beispiel, bei dem die Drehrichtung 16 des Excenterrades 17 im Uhrzeigersinn drehend ist, bezogen auf die Schlagrichtung 19 des Schlagwerks 20 nach rechts aus der Schlagwerksachse S herausverlagert. Bei einem gegen den Uhrzeigersinn drehenden Schlagwerk wäre die Drehachse D des Excenterrades 17 hingegen genau entgegengesetzt aus der Schlagwerksachse S heraus verlagert. Der Abstand X entspricht dabei dem 0,1 bis 0,8 fachen des Radius RE des Excenterrades 17.The percussion mechanism 20 defines a central percussion axis S which runs centrally through the guide tube 21 and the elements (exciter element 22, etc.) moved therein. The axis of rotation D of the Excenterrades 17 is offset perpendicular to the percussion axis S by a distance X, whereby the pressure curve in the hammer mechanism 20 during a working reduced but still achieved the same single impact energy or at the same maximum pressure, a higher single impact energy is achieved. The axis of rotation D is in the present example, in which the direction of rotation 16 of the eccentric 17 is rotating clockwise, based on the direction of impact 19 of the percussion mechanism 20 to the right out of the percussion axis S herausverlagert. In a counterclockwise rotating striking mechanism, however, the axis of rotation D of the eccentric wheel 17 would be displaced exactly opposite from the striking mechanism axis S. The distance X corresponds to 0.1 to 0.8 times the radius RE of the Excenterrades 17th

Der bezogen auf die Schlagwerksachse S axiale Abstand A der zwei möglichen Durchgangspunkte (angedeutet durch die gepunkteten Kreise 31, 32) des Lagerzapfens 18 durch die Schlagwerksachse S bei Rotation des Excenterrades 17 ist kleiner, als die zweifache radiale Distanz RL des Lagerzapfens 18 zur Drehachse D des Excenterrades 17.The relative to the percussion axis S axial distance A of the two possible crossing points (indicated by the dotted circles 31, 32) of the journal 18 by the percussion axis S upon rotation of the eccentric 17 is less than twice the radial distance RL of the journal 18 to the rotation axis D. of the Excenterrades 17.

Der Pleuel 29 ist vorzugsweise gekröpft ausgebildet wobei der Kröpfungswinkel K vorzugsweise zwischen 5° und 45° liegt.The connecting rod 29 is preferably formed cranked wherein the offset angle K is preferably between 5 ° and 45 °.

Claims (3)

Handwerkzeugmaschine mit einem über einen Motor (12) antreibbaren pneumatischem Schlagwerk (20), das eine zentrale Schlagwerksachse (S) definiert und das ein in einem Führungsrohr (21) hin und her bewegbares Erregerelement (22) sowie ein in dem Führungsrohr (21) versetzbar geführtes und mittels einer Luftfeder (25) über das Erregerelement (22) antreibbares Schlagelement (23) aufweist, wobei das Erregerelement (22) über einen an einem motorisch betreibbaren und eine ortsfeste Drehachse (D) aufweisenden Excenterrad (17) exzentrisch gelagerten Pleuel (29) in eine hin- und hergehende Bewegung versetzbar ist,
dadurch gekennzeichnet,
dass die Drehachse (D) des Excenterrades (17) in einem Abstand (X) senkrecht zur Schlagachse (S) beabstandet ist.Hand tool with a motor (12) drivable pneumatic percussion (20) which defines a central percussion axis (S) and a in a guide tube (21) movable back and forth excitation element (22) and in the guide tube (21) displaceable guided and by means of an air spring (25) via the exciter element (22) drivable impact element (23), wherein the excitation element (22) via a on a motor-operated and a stationary axis of rotation (D) having eccentric (17) eccentrically mounted connecting rod (29 ) is displaceable in a reciprocating motion,
characterized,
that the rotational axis (D) of the Excenterrades (17) at a distance (X) perpendicular to the striking axis (S) spaced. Handwerkzeugmaschine nach Anspruch 1, dadurch gekennzeichnet, dass der Abstand (x) der Drehachse (D) des Excenterrades (17) zur Schlagwerksachse (S) in einem Bereich von 10% bis 80% des Radius (RE) des Excenterrades (17) liegt.Powered hand tool according to claim 1, characterized in that the distance (x) of the axis of rotation (D) of the eccentric wheel (17) to the impactor axis (S) in a range of 10% to 80% of the radius (RE) of the Excenterrades (17). Handwerkzeugmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Pleuel (29) gekröpft ausgebildet ist.Powered hand tool according to claim 1 or 2, characterized in that the connecting rod (29) is formed cranked.
EP08104123.8A 2007-07-19 2008-05-27 Hand tool machine with pneumatic striking mechanism Not-in-force EP2017038B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007000393A DE102007000393A1 (en) 2007-07-19 2007-07-19 Hand tool with pneumatic percussion

Publications (2)

Publication Number Publication Date
EP2017038A1 true EP2017038A1 (en) 2009-01-21
EP2017038B1 EP2017038B1 (en) 2016-03-09

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Family Applications (1)

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EP08104123.8A Not-in-force EP2017038B1 (en) 2007-07-19 2008-05-27 Hand tool machine with pneumatic striking mechanism

Country Status (5)

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US (1) US8267189B2 (en)
EP (1) EP2017038B1 (en)
JP (1) JP5308731B2 (en)
CN (1) CN101347934A (en)
DE (1) DE102007000393A1 (en)

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EP2960374A1 (en) * 2014-06-23 2015-12-30 Wacker Neuson Produktion GmbH & Co. KG Working device with stamping mechanism or percussion mechanism with crossed crank drive

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CN101444909B (en) * 2007-11-27 2013-03-27 希尔蒂股份公司 Hand-held tool machine with pneumatic impacting device
CN102371573A (en) * 2010-08-10 2012-03-14 南京德朔实业有限公司 Electric tool
DE102011075765A1 (en) * 2011-05-12 2012-11-15 Hilti Aktiengesellschaft Hand tool
JP5913010B2 (en) * 2012-09-03 2016-04-27 株式会社マキタ Impact tool
WO2014034862A1 (en) * 2012-09-03 2014-03-06 株式会社マキタ Impact tool
CN103331735B (en) * 2013-07-02 2016-04-13 陈振宇 For carrying out the percussion mechanism and the toolroom machine that impact operation
EP2857149A1 (en) * 2013-10-03 2015-04-08 HILTI Aktiengesellschaft Manual tool machine
CN105940847B (en) * 2016-06-27 2017-09-29 蒙超华 A kind of drawing type cassava harvester
CN109404514B (en) * 2017-08-14 2021-06-11 苏州宝时得电动工具有限公司 Supporting structure of eccentric wheel, transmission mechanism and electric tool
CN109176411B (en) * 2018-11-13 2024-03-29 久维科技(苏州)有限公司 Quick fastening device
KR20210026249A (en) 2019-08-29 2021-03-10 현대자동차주식회사 Vehicle using eccentric wheel
US11864808B2 (en) * 2021-04-01 2024-01-09 DePuy Synthes Products, Inc. Gas spring surgical impacting tools
US11945084B2 (en) * 2021-04-26 2024-04-02 Snap-On Incorporated Offset impact mechanism for a hammer tool

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CN101347934A (en) 2009-01-21
US8267189B2 (en) 2012-09-18
JP5308731B2 (en) 2013-10-09
US20090020299A1 (en) 2009-01-22
EP2017038B1 (en) 2016-03-09
DE102007000393A1 (en) 2009-01-22
JP2009023084A (en) 2009-02-05

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