EP2216141B1 - Hand-held machine tool with vibration-damping handle - Google Patents

Hand-held machine tool with vibration-damping handle Download PDF

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Publication number
EP2216141B1
EP2216141B1 EP10161817A EP10161817A EP2216141B1 EP 2216141 B1 EP2216141 B1 EP 2216141B1 EP 10161817 A EP10161817 A EP 10161817A EP 10161817 A EP10161817 A EP 10161817A EP 2216141 B1 EP2216141 B1 EP 2216141B1
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EP
European Patent Office
Prior art keywords
handle
machine housing
levers
legs
power tool
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EP10161817A
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German (de)
French (fr)
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EP2216141A1 (en
Inventor
Gerhard Meixner
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • 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 present invention relates to a hand tool machine with vibration-damped handle, according to the preamble of claim 1 of the two extending approximately parallel to the longitudinal axis of the power tool leg has and is resiliently coupled to the machine housing.
  • a power tool is known from DE 41 04 917 A1.
  • thermoplastic elastomeric plastic to connect to the machine housing. So far, it is usual to connect the handle in two places with the machine housing. Even if one or more coupling points are provided with damping means, still finds a relatively high coupling of vibrations from the machine housing to the handle instead.
  • GB 1 549 771 and DE 41 04 917 A1 is in each case a hand tool with a vibration-damping handle known which has two approximately parallel to the longitudinal axis of the power tool running leg and is resiliently coupled to the machine housing.
  • a substantially aligned perpendicular to the machine longitudinal axis lever is articulated with one of its two ends on each leg, and the levers are hinged at their other ends to a lying between the two legs of the handle portion of the machine housing.
  • the handle devices shown here have disadvantages because on the one hand many parts are required and on the other hand, injury risks arise from the open structure.
  • the invention is therefore based on the object to provide a hand tool with a handle of the type mentioned, which is coupled with the simplest possible means largely vibration-damped to the machine housing of the power tool.
  • a high synchronization of the transmitted to the two legs of the lever movements is achieved with the features of claim 1, characterized in that the articulated on the machine housing ends of the lever have provided with a toothing rounding and that the articulation points of the lever on the machine housing so placed are that the serrations engage at the ends of the levers. Tilting and tilting of the handle can be largely suppressed by this measure.
  • the hinged to the individual legs of the handle levers are the same length. This ensures that the relative movement between the handle and the machine housing has almost exclusively a component in the direction of the longitudinal axis of the power tool. There are almost no movement components in other directions, which could bring an additional acceleration to the hand of the operator.
  • the articulation points of the levers can be arranged close to one another on the machine housing.
  • An improvement in the guidance and stability of the handle can be achieved that are articulated on the machine housing and on each of the two legs of the handle, two parallel, aligned substantially perpendicular to the machine longitudinal axis lever.
  • the ends of the legs of the handle are resiliently supported on the machine housing.
  • a further advantageous embodiment for vibration damping of the handle is that between the handle and the machine housing, one or more electrically controllable or controllable actuators are arranged which damp a vibration of the handle by counteracting a force or movement resulting from the vibration of the machine housing ,
  • FIG. 1 schematically is a hand tool, z. B. a hammer drill or chisel or the like.
  • the hand tool consists of a machine housing 1, in which the machine drive is located, and a handle 3 coupled to the machine housing 1.
  • the handle 3 is U-shaped and has two legs 5 and 7, which extend approximately parallel to the longitudinal axis 9 of the power tool , Preferably, the ends of the legs lead 5 and 7 of the handle 3 in molded on the machine housing 1 pockets 11 and 13 into it. In these pockets 11 and 13, the ends of the two legs 5 and 7 are supported by spring elements 15 and 17 against the machine housing 1. These spring elements 15 and 17 receive the force exerted on the handle 3 by the operator pressing force.
  • An advantageous embodiment for vibration damping of the handle is that between the handle 3, in addition to the springs 15, 17 or without springs, and the machine housing 1, one or more electrically controllable or controllable actuators are arranged, which thereby vibration of the handle 3 dampen that they counteract a resulting from the vibration of the machine housing 1 force or movement.
  • Such actuators are z. B. known from the EP 0 206 981 A2 or the WO 98/21014 ,
  • a lever 19, 21 is articulated so that it in the direction of the longitudinal axis 9 of the power tool is pivotable.
  • the two levers 19 and 21 are the same length.
  • the legs 5 and 7 remote from the ends of the levers 19 and 21 are hinged to the machine housing 1 in a lying between the two legs 5 and 7 area so that they are aligned substantially perpendicular to the machine longitudinal axis 9.
  • the articulation points 23 and 25 of the two levers 19 and 21 on the machine housing 1 are close together.
  • Tilting or tilting of the handle can be avoided by means which synchronize the levers 19 and 21 in their movement.
  • the ends of the levers 19, 21 articulated on the machine housing have a rounding 27, 29, which is provided with a toothing 31, 33.
  • the articulation points 23 and 25 of the two levers 19 and 21 are placed and their toothing 31, 33 provided with curves 27, 29 are dimensioned so that the serrations 31, 33 engage at the ends of the levers 19 and 21.
  • lever mechanism results in a very strong decoupling of the handle 3 against vibrations of the machine housing 1, which are caused for example by a striking mechanism.
  • the decoupling of the handle relative to the machine housing arises from the fact that because of the lever mechanism no direct connection points between the handle 3 and the machine housing 1 are required to give the handle 3 a high stability.
  • the levers 19 and 21 ensure that the handle 3 can perform a relative movement relative to the machine housing 1 almost exclusively in the direction of the machine longitudinal axis 9. Other components of movement, eg. B. tilting or tilting of the handle 3 is almost impossible due to a high degree of synchronization of the two lever movements.
  • the distance d between the articulation points 35 and 37 of the two levers 19 and 21 on the horizontal legs 5 and 7 of the handle 3 in a range of about 0 changes ,1 mm.
  • This slight change in the distance d between the articulation points 35 and 37 can be absorbed by the fact that the handle 3 is constructed or consists of such a material that it allows a certain elastic deformation.
  • FIG. 2 illustrated, not inventive hand tool with a vibration-damped handle is similar to that in the FIG. 1 illustrated embodiment except for the articulation of the two levers 19 and 21 on the machine housing 1. While in the embodiment in the FIG. 1 the two levers 19 and 21 adjacent pivot points 23 and 25 have the levers 19 and 21 in the in the FIG. 2 Hand tool shown a common point of articulation 39 on the housing 1. D. h. the two levers 19 and 21 are rotatably mounted on the housing 1 on a common axis 39.
  • FIG. 3 is another, not inventive hand tool with vibration damped handle 3 shown. All parts in this hand tool, which have the same function as in the hand-held power tools described above, have the same already in the FIGS. 1 and 2 used reference numerals. On the related to the FIGS. 1 and 2 described details will therefore not be discussed in more detail.
  • the main difference of this in FIG. 3 Hand tool shown opposite the hand tool described above is in Lever mechanism that connects the handle 3 with the machine housing 1. While in the hand tool according to the FIGS.
  • each leg 5, 7 is connected only via a lever to the machine housing 1, are hinged to the leg 5 of the handle 3 and to the machine housing 1 two parallel levers 41 and 43 and to the leg 7 and the machine housing 1 are also two parallel levers 45 and 47 articulated. Ie.
  • Each of the two legs 5, 7 is connected via a so-called parallel oscillator 41, 43 and 45, 47 resiliently connected to the machine housing.
  • the parallel oscillator 41, 43 and 45, 47 give the handle 3 a stable backlash-free storage and suppress very strong unwanted movement components that differ from a movement of the handle in the direction of the machine longitudinal axis 9.
  • opposing levers 41, 45 and 43, 47 of the two parallel oscillators each have a common pivot point 49, 51 on the machine housing 1.
  • the respective opposing levers 41, 45 and 43, 47 can also, as in the hand tool according to FIG. 1 , have adjacent articulation points and also be provided at their ends with curves, which have interlocking serrations. For a very high synchrony of the movements of the two legs 5 and 7 of the handle 3 is achieved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Vibration Prevention Devices (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Confectionery (AREA)

Abstract

The hand grip has two legs (5,7) parallel to the longitudinal machine axis (9), and is coupled elastically to the machine housing (1). A lever (19,21) extending at right angles to the direction of the axis, is hinged with one end to each leg. The other lever ends are hinged to a part of the machine housing between the two legs of the hand grip (3). The levers are parallel and there are devices (31,33), e.g. toothing on the lever ends, for synchronous movement of the levers. Electrically controlled/ regulated actuators between hand grip and machine housing dampen grip vibrations.

Description

Stand der TechnikState of the art

Die vorliegende Erfindung betrifft eine Handwerkzeugmaschine mit vibrationsgedämpftem Handgriff, gemäβ dem Oberbegriff des Anspruchs 1 der zwei in etwa parallel zur Längsachse der Handwerkzeugmaschine verlaufende Schenkel hat und der federnd mit dem Maschinengehäuse gekoppelt ist. Eine solche Handwerkzeugmaschine ist aus der DE 41 04 917 A1 bekannt.The present invention relates to a hand tool machine with vibration-damped handle, according to the preamble of claim 1 of the two extending approximately parallel to the longitudinal axis of the power tool leg has and is resiliently coupled to the machine housing. Such a power tool is known from DE 41 04 917 A1.

Insbesondere bei Handwerkzeugmaschinen mit einem schlagenden Antrieb, z. B. Bohrhämmer, Meißelhämmer und dergleichen, entstehen recht starke Vibrationen in der Maschine, die auf den Handgriff der Maschine übertragen werden und für den Bediener nicht nur unangenehm sind, sondern auch gesundheitsschädlich sein können. Z. B. aus der DE 195 03 526 A1 sind Maßnahmen bekannt, um den Handgriff einer Handwerkzeugmaschine gegen Vibrationen zu dämpfen. Diese Maßnahmen bestehen z. B. darin, dass der Handgriff an einem Ende über eine dämpfende Feder oder ein Federsystem mit dem Maschinengehäuse gekoppelt ist und dass der Handgriff am gegenüberliegenden Ende mittels eines Drehgelenks mit dem Maschinengehäuse verbunden ist. In dieser Druckschrift wird auch vorgeschlagen, die beiden Enden zweier parallel zur Längsachse der Handwerkzeugmaschine verlaufender Schenkel des Handgriffs über ein vibrationsdämpfendes Material, z. B. thermoplastischer Elastomer-Kunststoff, mit dem Maschinengehäuse zu verbinden. Es ist also bisher üblich, den Handgriff an zwei Stellen mit dem Maschinengehäuse zu verbinden. Auch wenn ein oder mehrere Koppelstellen mit Dämpfungsmitteln versehen sind, findet trotzdem noch eine relativ hohe Überkopplung von Vibrationen aus dem Maschinengehäuse auf den Handgriff statt.In particular, in manual power tools with a beating drive, z. As rotary hammers, chipping hammers and the like, quite strong vibrations in the machine, which are transmitted to the handle of the machine and are not only uncomfortable for the operator, but also can be harmful to health. For example, from the DE 195 03 526 A1 Measures are known to dampen the handle of a power tool against vibration. These measures exist z. Example, in that the handle is coupled at one end via a damping spring or a spring system with the machine housing and that the handle is connected at the opposite end by means of a rotary joint with the machine housing. In this document is also proposed, the two ends of two parallel to the longitudinal axis of the power tool running leg the handle via a vibration damping material, eg. B. thermoplastic elastomeric plastic to connect to the machine housing. So far, it is usual to connect the handle in two places with the machine housing. Even if one or more coupling points are provided with damping means, still finds a relatively high coupling of vibrations from the machine housing to the handle instead.

Aus GB 1 549 771 und DE 41 04 917 A1 ist jeweils eine Handwerkzeugmaschine mit einem vibrationsdämpfenden Handgriff bekannt, der zwei in etwa parallel zur Längsachse der Handwerkzeugmaschine verlaufende Schenkel hat und der federnd mit dem Maschinengehäuse gekoppelt ist. Dabei ist an jedem Schenkel ein im Wesentlichen senkrecht zur Maschinen-Längsachse ausgerichteter Hebel mit einem seiner beiden Enden angelenkt, und die Hebel sind mit ihren anderen Enden an einem zwischen den beiden Schenkeln des Handgriffs liegenden Bereich des Maschinengehäuses angelenkt. Die hier gezeigten Handgriffvorrichtungen haben Nachteile, da einerseits viele Teile erforderlich sind und andererseits durch den offenen Aufbau Verletzungsrisiken entstehen.Out GB 1 549 771 and DE 41 04 917 A1 is in each case a hand tool with a vibration-damping handle known which has two approximately parallel to the longitudinal axis of the power tool running leg and is resiliently coupled to the machine housing. Here, a substantially aligned perpendicular to the machine longitudinal axis lever is articulated with one of its two ends on each leg, and the levers are hinged at their other ends to a lying between the two legs of the handle portion of the machine housing. The handle devices shown here have disadvantages because on the one hand many parts are required and on the other hand, injury risks arise from the open structure.

Der Erfindung liegt daher die Aufgabe zu Grunde, eine Handwerkzeugmaschine mit einem Handgriff der eingangs genannten Art anzugeben, der mit möglichst einfachen Mitteln weitgehend vibrationsgedämpft an das Maschinengehäuse der Handwerkzeugmaschine angekoppelt ist.The invention is therefore based on the object to provide a hand tool with a handle of the type mentioned, which is coupled with the simplest possible means largely vibration-damped to the machine housing of the power tool.

Vorteile der ErfindungAdvantages of the invention

Die genannte Aufgabe wird mit den Merkmalen des Anspruchs 1 dadurch gelöst, dass an jedem der beiden Schenkel des Handgriffs mindestens ein im Wesentlichen senkrecht zur Maschinen-Längsachse ausgerichteter Hebel mit einem seiner beiden Enden angelenkt ist und dass die Hebel mit ihren anderen Enden an einem zwischen den beiden Schenkeln des Handgriffs liegenden Bereich des Maschinengehäuses angelenkt sind. Da der Handgriff allein über die Hebel mit dem Maschinengehäuse gekoppelt ist und er keine direkten Verbindungspunkte mehr mit dem Maschinengehäuse hat, entsteht eine sehr starke Entkopplung des Handgriffs gegenüber Vibrationen des Maschinengehäuses. Zudem erhält der Handgriff mit der Hebelkonstruktion eine recht hohe Stabilität.The above object is achieved with the features of claim 1, characterized in that at least one substantially perpendicular to the at least one of the two legs of the handle Machine longitudinal axis aligned lever is articulated with one of its two ends and that the levers are articulated with their other ends to a lying between the two legs of the handle portion of the machine housing. Since the handle is coupled only via the lever with the machine housing and he no longer has direct connection points with the machine housing, a very strong decoupling of the handle against vibrations of the machine housing. In addition, the handle with the lever construction gets a fairly high stability.

Eine hohe Synchronisation der auf die beiden Schenkel des Hebels übertragenen Bewegungen wird mit den Merkmalen des Anspruchs 1 dadurch erreicht, dass die am Maschinengehäuse angelenkten Enden der Hebel eine mit einer Zahnung versehene Rundung aufweisen und dass die Anlenkpunkte der Hebel am Maschinengehäuse so platziert sind, dass die Zahnungen an den Enden der Hebel ineinander greifen. Ein Kippen und Verkanten des Handgriffs lässt sich durch diese Maßnahme sehr weitgehend unterdrücken.A high synchronization of the transmitted to the two legs of the lever movements is achieved with the features of claim 1, characterized in that the articulated on the machine housing ends of the lever have provided with a toothing rounding and that the articulation points of the lever on the machine housing so placed are that the serrations engage at the ends of the levers. Tilting and tilting of the handle can be largely suppressed by this measure.

Vorteilhafte Weiterbildungen der Erfindung gehen aus den Unteransprüchen hervor.Advantageous developments of the invention will become apparent from the dependent claims.

Es ist zweckmäßig, dass die an die einzelnen Schenkel des Handgriffs angelenkten Hebel gleich lang sind. Damit ist gewährleistet, dass die Relativbewegung zwischen dem Handgriff und dem Maschinengehäuse nahezu ausschließlich eine Komponente in Richtung der Längsachse der Handwerkzeugmaschine hat. Es entstehen dabei nahezu keine Bewegungskomponenten in andere Richtungen, die eine zusätzliche Beschleunigung auf die Hand des Bedieners bringen könnten.It is appropriate that the hinged to the individual legs of the handle levers are the same length. This ensures that the relative movement between the handle and the machine housing has almost exclusively a component in the direction of the longitudinal axis of the power tool. There are almost no movement components in other directions, which could bring an additional acceleration to the hand of the operator.

Die Anlenkpunkte der Hebel können am Maschinengehäuse eng nebeneinander angeordnet sein.The articulation points of the levers can be arranged close to one another on the machine housing.

Eine Verbesserung der Führung und Stabilität des Handgriffs lässt sich dadurch erzielen, dass am Maschinengehäuse und an jedem der beiden Schenkel des Handgriffs zwei parallele, im Wesentlichen senkrecht zur Maschinen-Längsachse ausgerichtete Hebel angelenkt sind.An improvement in the guidance and stability of the handle can be achieved that are articulated on the machine housing and on each of the two legs of the handle, two parallel, aligned substantially perpendicular to the machine longitudinal axis lever.

Vorzugsweise sind die Enden der Schenkel des Handgriffs federnd am Maschinengehäuse abgestützt. Eine weiter vorteilhafte Ausführung zur Vibrationsdämpfung des Handgriffs besteht darin, dass zwischen dem Handgriff und dem Maschinengehäuse ein oder mehrere elektrisch steuerbare oder regelbare Aktoren angeordnet sind, welche eine Vibration des Handgriffs dadurch dämpfen, dass sie einer durch die Vibration des Maschinengehäuses entstehenden Kraft oder Bewegung entgegenwirken.Preferably, the ends of the legs of the handle are resiliently supported on the machine housing. A further advantageous embodiment for vibration damping of the handle is that between the handle and the machine housing, one or more electrically controllable or controllable actuators are arranged which damp a vibration of the handle by counteracting a force or movement resulting from the vibration of the machine housing ,

Zeichnungdrawing

Anhand mehrerer in der Zeichnung dargestellter Ausführungsbeispiele wird nachfolgend die Erfindung näher erläutert. Es zeigen:

  • Figur 1 eine Prinzipdarstellung eines mittels Hebeln am Maschinengehäuse gelagerten Handgriffs, wobei die Hebel verschiedene Anlenkpunkte am Maschinengehäuse haben,
  • Figur 2 eine Prinzipdarstellung eines mittels Hebeln am Maschinengehäuse gelagerten, nicht erfindungsgemäßen Handgriffs, wobei die Hebel einen gemeinsamen Anlenkpunkt am Maschinengehäuse haben, und
  • Figur 3 eine Prinzipdarstellung eines mittels zweier Parallelschwinger am Maschinengehäuse gelagerten, nicht erfindungsgemäßen Handgriffs.
On the basis of several embodiments shown in the drawings, the invention is explained in more detail below. Show it:
  • FIG. 1 a schematic representation of a lever mounted on the machine housing handle, the levers have different points of articulation on the machine housing,
  • FIG. 2 a schematic representation of a lever mounted on the machine housing, non-inventive handle, wherein the levers have a common pivot point on the machine housing, and
  • FIG. 3 a schematic diagram of a non-inventive handle mounted by means of two parallel oscillator on the machine housing.

Beschreibung von AusführungsbeispielenDescription of exemplary embodiments

In der Figur 1 ist schematisch eine Handwerkzeugmaschine, z. B. ein Bohrhammer oder Meißelhammer oder dergleichen dargestellt. Die Handwerkzeugmaschine besteht aus einem Maschinengehäuse 1, in dem sich der Maschinenantrieb befindet, und einem mit dem Maschinengehäuse 1 gekoppelten Handgriff 3. Der Handgriff 3 ist U-förmig ausgebildet und besitzt zwei Schenkel 5 und 7, die etwa parallel zur Längsachse 9 der Handwerkzeugmaschine verlaufen. Vorzugsweise führen die Enden der Schenkel 5 und 7 des Handgriffs 3 in am Maschinengehäuse 1 angeformte Taschen 11 und 13 hinein. In diesen Taschen 11 und 13 sind die Enden der beiden Schenkel 5 und 7 über Federelemente 15 und 17 gegen das Maschinengehäuse 1 abgestützt. Diese Federelemente 15 und 17 nehmen die auf den Handgriff 3 vom Bediener ausgeübte Andruckkraft auf. Eine vorteilhafte Ausführung zur Vibrationsdämpfung des Handgriffs besteht darin, dass zwischen dem Handgriff 3, zusätzlich zu den Federn 15, 17 oder auch ohne Federn, und dem Maschinengehäuse 1 ein oder mehrere elektrisch steuerbare oder regelbare Aktoren angeordnet sind, welche eine Vibration des Handgriffs 3 dadurch dämpfen, dass sie einer durch die Vibration des Maschinengehäuses 1 entstehenden Kraft oder Bewegung entgegenwirken. Solche Aktoren sind z. B. bekannt aus der EP 0 206 981 A2 oder der WO 98/21014 .In the FIG. 1 schematically is a hand tool, z. B. a hammer drill or chisel or the like. The hand tool consists of a machine housing 1, in which the machine drive is located, and a handle 3 coupled to the machine housing 1. The handle 3 is U-shaped and has two legs 5 and 7, which extend approximately parallel to the longitudinal axis 9 of the power tool , Preferably, the ends of the legs lead 5 and 7 of the handle 3 in molded on the machine housing 1 pockets 11 and 13 into it. In these pockets 11 and 13, the ends of the two legs 5 and 7 are supported by spring elements 15 and 17 against the machine housing 1. These spring elements 15 and 17 receive the force exerted on the handle 3 by the operator pressing force. An advantageous embodiment for vibration damping of the handle is that between the handle 3, in addition to the springs 15, 17 or without springs, and the machine housing 1, one or more electrically controllable or controllable actuators are arranged, which thereby vibration of the handle 3 dampen that they counteract a resulting from the vibration of the machine housing 1 force or movement. Such actuators are z. B. known from the EP 0 206 981 A2 or the WO 98/21014 ,

An jedem der beiden waagerecht verlaufenden Schenkel 5 und 7 des Handgriffs 3 ist ein Hebel 19, 21 so angelenkt, dass er in Richtung der Längsachse 9 der Handwerkzeugmaschine schwenkbar ist. Die beiden Hebel 19 und 21 sind gleich lang. Die den Schenkeln 5 und 7 entfernt liegenden Enden der Hebel 19 und 21 sind am Maschinengehäuse 1 in einem zwischen den beiden Schenkeln 5 und 7 liegenden Bereich so angelenkt, dass sie im Wesentlichen senkrecht zur Maschinen-Längsachse 9 ausgerichtet sind. Die Anlenkpunkte 23 und 25 der beiden Hebel 19 und 21 am Maschinengehäuse 1 liegen eng nebeneinander.At each of the two horizontally extending legs 5 and 7 of the handle 3, a lever 19, 21 is articulated so that it in the direction of the longitudinal axis 9 of the power tool is pivotable. The two levers 19 and 21 are the same length. The legs 5 and 7 remote from the ends of the levers 19 and 21 are hinged to the machine housing 1 in a lying between the two legs 5 and 7 area so that they are aligned substantially perpendicular to the machine longitudinal axis 9. The articulation points 23 and 25 of the two levers 19 and 21 on the machine housing 1 are close together.

Ein Verkippen oder Verkanten des Handgriffs kann durch Mittel vermieden werden, welche die Hebel 19 und 21 in ihrer Bewegung synchronisieren. Um eine hohe Synchronität in der Bewegung der beiden Hebel 19 und 21 zu erzielen, weisen die am Maschinengehäuse angelenkten Enden der Hebel 19, 21 eine Rundung 27, 29 auf, welche mit einer Zahnung 31, 33 versehen ist. Die Anlenkpunkte 23 und 25 der beiden Hebel 19 und 21 sind so plaziert und deren mit Zahnungen 31, 33 versehene Rundungen 27, 29 sind so dimensioniert, dass die Zahnungen 31, 33 an den Enden der Hebel 19 und 21 ineinandergreifen.Tilting or tilting of the handle can be avoided by means which synchronize the levers 19 and 21 in their movement. In order to achieve high synchronicity in the movement of the two levers 19 and 21, the ends of the levers 19, 21 articulated on the machine housing have a rounding 27, 29, which is provided with a toothing 31, 33. The articulation points 23 and 25 of the two levers 19 and 21 are placed and their toothing 31, 33 provided with curves 27, 29 are dimensioned so that the serrations 31, 33 engage at the ends of the levers 19 and 21.

Mit dem vorangehend beschriebenen Hebelmechanismus entsteht eine sehr starke Entkopplung des Handgriffs 3 gegenüber Vibrationen des Maschinengehäuses 1, die beispielsweise von einem Schlagwerk hervorgerufen werden. Die Entkopplung des Handgriffs gegenüber dem Maschinengehäuse entsteht dadurch, dass wegen des Hebelmechanismus keine direkten Verbindungsstellen zwischen dem Handgriff 3 und dem Maschinengehäuse 1 erforderlich sind, um dem Handgriff 3 eine hohe Stabilität zu verleihen. Die Hebel 19 und 21 sorgen dafür, dass der Handgriff 3 eine Relativbewegung gegenüber dem Maschinengehäuse 1 nahezu ausschließlich in Richtung der Maschinen-Längsachse 9 vollziehen kann. Andere Bewegungskomponenten, z. B. ein Kippen oder Verkanten des Handgriffs 3 ist in Folge einer hohen Synchronisation der beiden Hebelbewegungen nahezu ausgeschlossen.With the above-described lever mechanism results in a very strong decoupling of the handle 3 against vibrations of the machine housing 1, which are caused for example by a striking mechanism. The decoupling of the handle relative to the machine housing arises from the fact that because of the lever mechanism no direct connection points between the handle 3 and the machine housing 1 are required to give the handle 3 a high stability. The levers 19 and 21 ensure that the handle 3 can perform a relative movement relative to the machine housing 1 almost exclusively in the direction of the machine longitudinal axis 9. Other components of movement, eg. B. tilting or tilting of the handle 3 is almost impossible due to a high degree of synchronization of the two lever movements.

Beim Arbeiten mit der Maschine und der dabei entstehenden Auslenkung der beiden Hebel 19 und 21 verändert sich der Abstand d zwischen den Anlenkpunkten 35 und 37 der beiden Hebel 19 und 21 an den waagerechten Schenkeln 5 und 7 des Handgriffs 3 in einem Bereich von ca. 0,1mm. Diese leichte Veränderung des Abstandes d zwischen den Anlenkpunkten 35 und 37 kann dadurch aufgefangen werden, dass der Handgriff 3 so konstruiert ist bzw. aus einem solchen Material besteht, dass er eine gewisse elastische Verformung zulässt.When working with the machine and the resulting deflection of the two levers 19 and 21, the distance d between the articulation points 35 and 37 of the two levers 19 and 21 on the horizontal legs 5 and 7 of the handle 3 in a range of about 0 changes ,1 mm. This slight change in the distance d between the articulation points 35 and 37 can be absorbed by the fact that the handle 3 is constructed or consists of such a material that it allows a certain elastic deformation.

Die in der Figur 2 dargestellte, nicht erfindungsgemäße Handwerkzeugmaschine mit einem vibrationsgedämpften Handgriff gleicht dem in der Figur 1 dargestellten Ausführungsbeispiel bis auf die Anlenkung der beiden Hebel 19 und 21 am Maschinengehäuse 1. Während beim Ausführungsbeispiel in der Figur 1 die beiden Hebel 19 und 21 nebeneinander liegende Anlenkpunkte 23 und 25 aufweisen, haben die Hebel 19 und 21 bei der in der Figur 2 dargestellte Handwerkzeugmaschine einen gemeinsamen Anlenkpunkt 39 am Gehäuse 1. D. h. die beiden Hebel 19 und 21 sind am Gehäuse 1 auf einer gemeinsamen Achse 39 drehbar gelagert.The in the FIG. 2 illustrated, not inventive hand tool with a vibration-damped handle is similar to that in the FIG. 1 illustrated embodiment except for the articulation of the two levers 19 and 21 on the machine housing 1. While in the embodiment in the FIG. 1 the two levers 19 and 21 adjacent pivot points 23 and 25 have the levers 19 and 21 in the in the FIG. 2 Hand tool shown a common point of articulation 39 on the housing 1. D. h. the two levers 19 and 21 are rotatably mounted on the housing 1 on a common axis 39.

In der Figur 3 ist eine weitere, nicht erfindungsgemäße Handwerkzeugmaschine mit vibrationsgedämpftem Handgriff 3 dargestellt. Alle Teile bei dieser Handwerkzeugmaschine, welche die gleiche Funktion haben wie bei den vorangehend beschriebenen Handwerkzeugmaschinen, haben die selben bereits in den Figuren 1 und 2 verwendeten Bezugszeichen. Auf die im Zusammenhang mit den Figuren 1 und 2 beschriebenen Details wird daher nicht mehr näher eingegangen. Der wesentliche Unterschied dieser in Figur 3 dargestellten Handwerkzeugmaschine gegenüber den zuvor beschriebenen Handwerkzeugmaschine besteht im Hebelmechanismus, der den Handgriff 3 mit dem Maschinengehäuse 1 verbindet. Während bei den Handwerkzeugmaschinen gemäß den Figuren 1 und 2 jeder Schenkel 5, 7 nur über einen Hebel mit dem Maschinengehäuse 1 verbunden ist, sind an den Schenkel 5 des Handgriffs 3 und an das Maschinengehäuse 1 zwei parallele Hebel 41 und 43 angelenkt und an den Schenkel 7 und das Maschinengehäuse 1 sind ebenfalls zwei parallele Hebel 45 und 47 angelenkt. D. h. jeder der beiden Schenkel 5, 7 ist über einen sogenannten Parallelschwinger 41, 43 und 45, 47 mit dem Maschinengehäuse federnd verbunden. Die Parallelschwinger 41, 43 und 45, 47 verleihen dem Handgriff 3 eine stabile spielfreie Lagerung und unterdrücken sehr stark unerwünschte Bewegungskomponenten, die von einer Bewegung des Handgriffs in Richtung der Maschinen-Längsachse 9 abweichen.In the FIG. 3 is another, not inventive hand tool with vibration damped handle 3 shown. All parts in this hand tool, which have the same function as in the hand-held power tools described above, have the same already in the FIGS. 1 and 2 used reference numerals. On the related to the FIGS. 1 and 2 described details will therefore not be discussed in more detail. The main difference of this in FIG. 3 Hand tool shown opposite the hand tool described above is in Lever mechanism that connects the handle 3 with the machine housing 1. While in the hand tool according to the FIGS. 1 and 2 each leg 5, 7 is connected only via a lever to the machine housing 1, are hinged to the leg 5 of the handle 3 and to the machine housing 1 two parallel levers 41 and 43 and to the leg 7 and the machine housing 1 are also two parallel levers 45 and 47 articulated. Ie. Each of the two legs 5, 7 is connected via a so-called parallel oscillator 41, 43 and 45, 47 resiliently connected to the machine housing. The parallel oscillator 41, 43 and 45, 47 give the handle 3 a stable backlash-free storage and suppress very strong unwanted movement components that differ from a movement of the handle in the direction of the machine longitudinal axis 9.

Bei der Handwerkzeugmaschine der in Figur 3 haben einander gegenüberliegende Hebel 41, 45 und 43, 47 der beiden Parallelschwinger jeweils einen gemeinsamen Anlenkpunkt 49, 51 am Maschinengehäuse 1. Die jeweils einander gegenüberliegenden Hebel 41, 45 und 43, 47 können aber ebenfalls, wie bei der Handwerkzeugmaschinen gemäß der Figur 1, nebeneinander liegende Anlenkpunkte haben und ebenfalls an ihren Enden mit Rundungen versehen sein, die ineinandergreifende Zahnungen aufweisen. Damit wird eine sehr hohe Synchronität der Bewegungen der beiden Schenkel 5 und 7 des Handgriffs 3 erzielt.In the hand tool of the in FIG. 3 have opposing levers 41, 45 and 43, 47 of the two parallel oscillators each have a common pivot point 49, 51 on the machine housing 1. The respective opposing levers 41, 45 and 43, 47 can also, as in the hand tool according to FIG. 1 , have adjacent articulation points and also be provided at their ends with curves, which have interlocking serrations. For a very high synchrony of the movements of the two legs 5 and 7 of the handle 3 is achieved.

Claims (6)

  1. Portable power tool with vibration-damped handle which has two legs (5, 7) running approximately parallel to the longitudinal axis (9) of the portable power tool and which is coupled to the machine housing (1) in a spring-loaded manner, wherein at least one lever (19, 21) oriented substantially perpendicularly to the machine longitudinal axis (9) is linked by means of one of its two ends to each of the two legs (5, 7), and wherein the levers (19, 21) are linked by means of their other ends to a region of the machine housing (1) lying between the two legs (5, 7) of the handle (3), characterized in that there are means (31, 33) which produce a synchronous movement of the levers (19, 21), and in that the ends of the levers (19, 21) linked to the machine housing (1) have a rounded portion (27, 29) provided with a tooth system (31, 33), and in that the points (23, 25) at which the levers (19, 21) are linked to the machine housing (1) are placed in such a way that the tooth systems (31, 33) at the ends of the levers (19, 21) intermesh.
  2. Portable power tool according to Claim 1, characterized in that the levers (19, 21) are the same length.
  3. Portable power tool according to either of Claims 1 and 2, characterized in that the points (23, 25) at which the levers (19, 21) are linked to the machine housing (1) are arranged close together.
  4. Portable power tool according to one of the preceding claims, characterized in that two parallel levers oriented substantially perpendicularly to the machine longitudinal axis (9) are linked to the machine housing (1) and to each of the two legs (5, 7) of the handle (3).
  5. Portable power tool according to one of the preceding claims, characterized in that the ends of the legs (5, 7) of the handle (3) are supported on the machine housing (1) in a spring-loaded manner.
  6. Portable power tool according to one of the preceding claims, characterized in that one or more electrically controllable actuators are arranged between the handle (3) and the machine housing (1) and dampen a vibration of the handle (3) by virtue of the fact that they counteract a force or movement produced by the vibration of the machine housing (1).
EP10161817A 2001-07-24 2002-03-13 Hand-held machine tool with vibration-damping handle Expired - Lifetime EP2216141B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10136015A DE10136015A1 (en) 2001-07-24 2001-07-24 Hand-held machine tool has vibration-dampened hand grip of two legs with levers hinged top hand grip legs and machine housing
EP02729781A EP1414624B1 (en) 2001-07-24 2002-03-13 Hand-held machine tool with vibration-damped handle

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP02729781.1 Division 2002-03-13

Publications (2)

Publication Number Publication Date
EP2216141A1 EP2216141A1 (en) 2010-08-11
EP2216141B1 true EP2216141B1 (en) 2011-11-16

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EP02729781A Expired - Lifetime EP1414624B1 (en) 2001-07-24 2002-03-13 Hand-held machine tool with vibration-damped handle
EP10161817A Expired - Lifetime EP2216141B1 (en) 2001-07-24 2002-03-13 Hand-held machine tool with vibration-damping handle

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EP02729781A Expired - Lifetime EP1414624B1 (en) 2001-07-24 2002-03-13 Hand-held machine tool with vibration-damped handle

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US (1) US7076838B2 (en)
EP (2) EP1414624B1 (en)
JP (1) JP2004521771A (en)
CN (1) CN100352613C (en)
AT (2) ATE533597T1 (en)
DE (2) DE10136015A1 (en)
ES (1) ES2344404T3 (en)
WO (1) WO2003011532A1 (en)

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Also Published As

Publication number Publication date
EP1414624B1 (en) 2010-05-26
ES2344404T3 (en) 2010-08-26
US20040040729A1 (en) 2004-03-04
EP1414624A1 (en) 2004-05-06
CN100352613C (en) 2007-12-05
DE50214455D1 (en) 2010-07-08
ATE468945T1 (en) 2010-06-15
ATE533597T1 (en) 2011-12-15
DE10136015A1 (en) 2003-02-13
CN1463214A (en) 2003-12-24
JP2004521771A (en) 2004-07-22
WO2003011532A1 (en) 2003-02-13
US7076838B2 (en) 2006-07-18
EP2216141A1 (en) 2010-08-11

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