EP1691954B1 - Percussion hammer and/or drill hammer comprising a handle which can be guided in a linear manner - Google Patents
Percussion hammer and/or drill hammer comprising a handle which can be guided in a linear manner Download PDFInfo
- Publication number
- EP1691954B1 EP1691954B1 EP04803257A EP04803257A EP1691954B1 EP 1691954 B1 EP1691954 B1 EP 1691954B1 EP 04803257 A EP04803257 A EP 04803257A EP 04803257 A EP04803257 A EP 04803257A EP 1691954 B1 EP1691954 B1 EP 1691954B1
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- EP
- European Patent Office
- Prior art keywords
- hammer
- housing
- percussion
- drill
- gripping device
- 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.)
- Not-in-force
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- 238000009527 percussion Methods 0.000 title claims abstract description 17
- 238000005096 rolling process Methods 0.000 claims abstract description 36
- 230000007246 mechanism Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 4
- 238000013016 damping Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 238000002955 isolation Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/04—Handles; Handle mountings
- B25D17/043—Handles resiliently mounted relative to the hammer housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/24—Damping the reaction force
-
- 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
- B25D2250/121—Housing details
-
- 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
- B25D2250/331—Use of bearings
-
- 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
- B25D2250/371—Use of springs
Definitions
- the invention relates to a breaker and / or hammer drill according to the preamble of claim 1.
- a hammer is made, for example US-A-5,522,466 known.
- Such a breaker and / or hammer drill hereinafter referred to as a hammer, is from the DE 34 47 401 A1 known.
- a part of a hammer housing in which, inter alia, a drive of the hammer and driven by the drive percussion are arranged, surrounded by a handle designed as a grip device. Handles for the operator are provided on the grip hood.
- a parallel swing guide means allows the handle cover to translate linearly relative to the hammer housing as the operator presses the hammer over the handles against the rock to be worked.
- the parallel rockers are still connected to torsion springs to allow vibration damping for the grip hood.
- a handle is provided axially behind a hammer housing, which is guided via a guide device relative to the hammer housing linearly movable.
- the guide device consists of a plurality of linear guides, each having an inner guide member and an inner guide member at a distance surrounding outer guide member, wherein between the inner and the outer guide member, an elastic member is inserted.
- the elastic element has a greater elasticity in the working direction of the hammer, ie in the direction of the longitudinal or striking axis of the hammer, than in a direction transverse to the longitudinal axis. This allows the guide device a good vibration isolation in the working direction, while the hammer can be held securely across the working direction.
- the invention has for its object to provide a breaker and / or hammer drill, with an improved guidance with respect to their leadership means for linear guidance of a handle device relative to a hammer housing while maintaining or improving vibration damping properties and a reduction in construction costs.
- An inventive breaking and / or hammer drill is characterized in that the guide means comprises an effective between the hammer housing and the handle device Wälzianus Surprise.
- the realizable by the Wälzterrorism issued linear guide allows the handle device is reliably guided linearly relative to the hammer housing.
- Characterized in that the Wälz stresses adopted allows a definable or minimizable frictional action between the handle device and the hammer housing, a vibration decoupling effect can be adjusted precisely.
- minimum friction values can be achieved, which allow a good relative movement between the handle device and the hammer housing, so that the vibrations of the hammer housing are not transmitted to the grip device.
- the guide device based on the working direction (direction of impact, main direction), laterally provided on the hammer housing. This allows an axial extension of the hammer, such. B. from the EP 0 949 988 B1 can be seen, avoid.
- the lateral arrangement of the guide means does not increase the overall length of the hammer.
- the grip device surrounds the hammer housing at a distance, so that a gap is formed.
- the guide device is arranged in the intermediate space between the hammer housing and the gripping device. Therefore, it requires no additional housing and no additional space, since due to the relative mobility between the handle device and hammer housing anyway a space to allow the relative movement is required.
- the Wälz stresses granted a defined spring property transversely to the working direction, ie transversely to the longitudinal or direction of impact.
- the grip device in addition to the linear mobility, is also movable transversely to the working direction relative to the hammer housing.
- the transverse mobility should be significantly less than the longitudinal mobility to allow a good guidance of the hammer on the handle device or on the one or more handles.
- a small angular offset between the hammer housing and the handle device is possible, which reduces in particular the occurrence of transverse vibrations on the handle.
- the WälzShores drove a plurality of rolling elements, which are rotatably mounted on the handle device and which are assigned to the outside of the hammer housing provided guideways.
- the rolling elements can accordingly roll on the tracks of the hammer housing, whereby a very simple, robust linear guide is achieved.
- the rolling elements may be purchased parts that can be easily attached to the inside of the grip device. Since the commercially available rolling elements, eg. As plastic rollers, usually already equipped with bearings (plain bearings, roller bearings), the additional construction costs can be kept low.
- the rolling elements are each held by a spring device with a defined force against the guideways.
- the spring device can accordingly be provided in each case between the rolling elements and the grip device. This makes it possible, the transverse mobility the grip device to adjust precisely relative to the hammer housing.
- the rolling elements have a defined spring property and thus a deformability in their radial direction. This is particularly possible if the rolling elements consist of an elastic plastic material or at least have a running surface made of plastic. In this case, the rolling elements can be attached directly to the grip device by means of bearings. Due to the elastic deformability of the rolling elements relative to the guideways on which the rolling elements roll, sufficient gripper mobility of the gripping device relative to the hammer housing is produced.
- a longitudinal spring device acting in the working direction is provided between the hammer housing and the gripping device.
- the longitudinal spring device which may include damper devices in addition to spring elements, ensures a reliable vibration isolation of the vibrations occurring during operation of the hammer. This ensures that the handle device and in particular the handle provided on the handle transmits only small vibrations to the operator.
- Suitable damping devices are passive elements (eg rubber buffers) as well as active or semi-active damping or decoupling devices.
- the extent of the hammer housing in the working direction is greater than in a direction transverse to the working direction.
- the hammer has an elongated extension, which benefits the possibility of longitudinal guidance between the gripping device and the hammer housing.
- the hammer housing at least in a extending in the direction of housing housing portion on a non-changing outer cross-sectional shape.
- this housing portion can then provide the guideways in a simple manner.
- z. B. for the hammer housing an extruded guide cylinder can be used, the uniform outer contour only a small amount of machining for producing the guideways requires.
- the guideways can already be produced during extrusion, which brings a considerable reduction in manufacturing costs.
- the striking mechanism can also be advantageously arranged in the housing subregion.
- the outer cross-sectional shape of the hammer housing is designed substantially prismatic.
- one or more edges of the prism can be overlapped by the rolling elements attached to the gripping device.
- the gripping device is a kind of carrier for the handle or handles.
- the gripping device is designed as a gripping hood, which surrounds at least a part of the hammer housing.
- the handle cover can hood or cup-shaped enclosing the hammer housing, as z. B. from the DE 34 47 401 A1 is known.
- the handles are then attached to the exterior of the handle cover or integrally connected thereto.
- Fig. 1 shows a schematic side view of a breakaway and / or hammer drill, hereinafter referred to as a hammer.
- Fig. 2 the same view is shown, but with a front part of serving as a handle device handle cover 1 is removed, so that in the interior of a schematically illustrated hammer housing 2 is visible.
- a tool for. B. a drill or a chisel is fastened.
- the hammer housing 2 has a drive housing 5, in which in a known manner a motor drive, a crank mechanism, etc. are provided. Below the drive housing 5, a striking mechanism housing 6, which likewise belongs to the hammer housing 2, is arranged, in which a striking movement is generated from the drive movement generated by the motor, which is finally applied to the tool, not shown.
- a striking movement is generated from the drive movement generated by the motor, which is finally applied to the tool, not shown.
- a guide means 7 is provided, at least a linear guide of the handle cover 1 relative to the hammer housing 2 in the working direction A (direction of impact, longitudinal direction) of the hammer, but preferably also a guide of the handle cover 1 relative to the hammer housing 2 transversely to the working direction and in a direction of rotation about the direction of action lying beating axis allows.
- the guide device 7 has a WälzSystem Surprise 8, which comprises a plurality of rolling elements 9. At the in Fig. 2 shown example four rolling elements 9 can be seen.
- the rolling elements 9 are rotatably mounted on the inside of the handle cover 1.
- the rolling elements 9 may be purchased parts.
- Fig. 3 shows however a special production of the rolling elements 9.
- the rolling elements 9 shown there have plastic rollers 9a (eg elastomeric rollers) which are respectively mounted on roller bearings 10 on an axis 11 held in the handle cover 1.
- the plastic rollers 9a roll over guide tracks 12 which extend parallel to the longitudinal direction A on the outside of the hammer housing. If it is the hammer housing 2 and the striking mechanism housing 6 is an extruded profile, such as. In Fig. 2 and 3 shown, the guideways 12 can already be prepared by the extrusion process. Optionally, only a minor reworking of the guideways 12 is required.
- the hammer housing 2 in particular that belongs to the hammer housing 2 striking mechanism housing 6 extends in the longitudinal direction more than in a direction transverse thereto , This is also out Fig. 2 seen.
- the paired rolling elements 9 (upper pair and lower pair) then represent a reliable Kipp Klisch due to their relative to the working direction A relatively large axial distance.
- the Wälz stresses sexual shorten 8 are each held by a spring means on the inside of the handle cover 1, whereby the rolling elements 9 and the plastic rollers 9a are pressed with a defined force against the guideways 12.
- the transverse mobility of the handle cover 1 relative to the hammer housing 2 can be set particularly precisely.
- the plastic rollers 9a may preferably also be made of an elastic material, so that they have a certain deformability in their radial direction. This makes it possible that the handle cover 1 is also transversely to the hammer housing 2, against the spring action of the elastic material of the plastic rollers 9a movable.
- a longitudinal spring device 13 is provided between the handle cover 1 and hammer housing 2.
- the longitudinal spring device 13 comprises springs, which may be biased, so that the handle cover 1 is movable relative to the hammer housing 2 only after overcoming the biasing effect.
- the longitudinal spring device 13 ensures that the grip hood 1 returns to the initial state relative to the hammer housing 2 after relief.
- the longitudinal spring device 13 may moreover also have damping elements which allow an adaptation of the damping effect.
- damping elements can be passive, active or semi-active dampers or decoupling devices, which as such are already known from the prior art.
- the hammer housing 2 in particular belonging to the hammer housing 2 striking mechanism housing 6, have a prismatic in principle cross-section, in which the outer cross-sectional shape at least schematically corresponds to a prism.
- the guideways 12 are formed exactly in the region of the edges of the prism shape.
- the edges need not be sharply drawn, but may have a cylindrical curvature, as in Fig. 3 is shown.
- the plastic rollers 9a it is possible for the plastic rollers 9a to have a hollow-edged outer contour, with which they can embrace the guide tracks 12, ie the "edges" of the prism, as in FIG Fig. 3 shown. In this way can already be with the two in Fig. 3 Ensure rolling elements 9 shown that the handle cover 1 is guided relative to the hammer housing 2 and can not break out in a direction perpendicular to the drive direction A.
- the guideways 12 can form recesses in which the plastic rollers 9a roll out laterally.
- a differently shaped support for the handle or handles 3 can be used.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
Description
Die Erfindung betrifft einen Aufbruch- und/oder Bohrhammer gemäß dem Oberbegriff von Patentanspruch 1. Ein solche Hammer ist z.B. aus
Ein derartiger Aufbruch- und/oder Bohrhammer, nachfolgend als Hammer bezeichnet, ist aus der
Ein ähnliches Prinzip ist aus der
Die beschriebenen Führungseinrichtungen zum linearen Führen eines Handgriffs bzw. einer Griffeinrichtung relativ zu dem Hammergehäuse haben sich in der Praxis gut bewährt. Gleichwohl erfordert ihre Realisierung zusätzlichen Bauraum und einen durch eine erhöhte Anzahl von Einzelteilen bedingten Bauaufwand.The described guide means for linearly guiding a handle relative to the hammer housing have been well proven in practice. Nevertheless, their implementation requires additional space and a conditional by an increased number of items construction costs.
Aus der
Der Erfindung liegt die Aufgabe zugrunde, einen Aufbruch- und/oder Bohrhammer anzugeben, mit einer hinsichtlich ihrer Führungswirkung verbesserten Führungseinrichtung zum linearen Führen einer Griffeinrichtung relativ zu einem Hammergehäuse unter gleichzeitiger Beibehaltung oder Verbesserung schwingungsdämpfender Eigenschaften und einer Verminderung des Bauaufwands.The invention has for its object to provide a breaker and / or hammer drill, with an improved guidance with respect to their leadership means for linear guidance of a handle device relative to a hammer housing while maintaining or improving vibration damping properties and a reduction in construction costs.
Erfindungsgemäß wird die Aufgabe durch einen Aufbruch- und/oder Bohrhammer gemäß Patentanspruch 1 gelöst. Vorteilhafte Weiterentwicklungen der Erfindung sind in den abhängigen Ansprüchen definiert.According to the invention the object is achieved by a breaking and / or hammer drill according to
Ein erfindungsgemäßer Aufbruch- und/oder Bohrhammer (Hammer) ist dadurch gekennzeichnet, dass die Führungseinrichtung eine zwischen dem Hammergehäuse und der Griffeinrichtung wirksame Wälzkörpereinrichtung aufweist. Die durch die Wälzkörpereinrichtung realisierbare Linearführung ermöglicht es, dass die Griffeinrichtung zuverlässig relativ zu dem Hammergehäuse linear geführt wird. Dadurch, dass die Wälzkörpereinrichtung eine definierbare bzw. minimierbare Reibungswirkung zwischen Griffeinrichtung und Hammergehäuse gestattet, kann eine Schwingungsentkopplungswirkung präzise eingestellt werden. Bei einer Wälzkörpereinrichtung lassen sich minimale Reibungswerte erzielen, die eine gute Relativbewegung zwischen Griffeinrichtung und Hammergehäuse zulassen, so dass die Schwingungen des Hammergehäuses nicht auf die Griffeinrichtung übertragen werden. Darüber hinaus ist es möglich, dass für die Führungseinrichtung nicht mehr - wie beim Stand der Technik - vollständig separate Führungselemente zusätzlich bereitgestellt werden müssen. Vielmehr können sowohl die Griffeinrichtung als auch das Hammergehäuse als Bestandteile der Führungseinrichtung genutzt werden, wie später noch erläutert wird.An inventive breaking and / or hammer drill (hammer) is characterized in that the guide means comprises an effective between the hammer housing and the handle device Wälzkörpereinrichtung. The realizable by the Wälzkörpereinrichtung linear guide allows the handle device is reliably guided linearly relative to the hammer housing. Characterized in that the Wälzkörpereinrichtung allows a definable or minimizable frictional action between the handle device and the hammer housing, a vibration decoupling effect can be adjusted precisely. In a Wälzkörpereinrichtung minimum friction values can be achieved, which allow a good relative movement between the handle device and the hammer housing, so that the vibrations of the hammer housing are not transmitted to the grip device. Moreover, it is possible that for the guide device no longer - as in the prior art - completely separate guide elements must be additionally provided. Rather, both the handle device and the hammer housing can be used as components of the guide device, as will be explained later.
Bei einer bevorzugten Ausführungsform der Erfindung ist die Führungseinrichtung, bezogen auf die Arbeitsrichtung (Schlagrichtung, Hauptrichtung), seitlich an dem Hammergehäuse vorgesehen. Dadurch lässt sich eine axiale Verlängerung des Hammers, wie z. B. aus der
Bei einer weiteren Ausführungsform der Erfindung umgibt die Griffeinrichtung das Hammergehäuse mit Abstand, so dass ein Zwischenraum gebildet wird. Die Führungseinrichtung ist in dem Zwischenraum zwischen dem Hammergehäuse und der Griffeinrichtung angeordnet. Sie benötigt daher kein zusätzliches Gehäuse und auch keinen zusätzlichen Bauraum, da aufgrund der relativen Beweglichkeit zwischen Griffeinrichtung und Hammergehäuse ohnehin ein Zwischenraum zum Zulassen der Relativbewegung erforderlich ist.In a further embodiment of the invention, the grip device surrounds the hammer housing at a distance, so that a gap is formed. The guide device is arranged in the intermediate space between the hammer housing and the gripping device. Therefore, it requires no additional housing and no additional space, since due to the relative mobility between the handle device and hammer housing anyway a space to allow the relative movement is required.
Vorteilhafterweise gewährt die Wälzkörpereinrichtung eine definierte Federeigenschaft quer zu der Arbeitsrichtung, also quer zur Längs- bzw. Schlagrichtung. Dadurch ist die Griffeinrichtung in Ergänzung zu der linearen Beweglichkeit auch quer zu der Arbeitsrichtung relativ zu dem Hammergehäuse beweglich. Selbstverständlich sollte die Querbeweglichkeit deutlich geringer sein als die Längsbeweglichkeit, um eine gute Führung des Hammers über die Griffeinrichtung bzw. über den oder die Handgriffe zu ermöglichen. Dadurch ist andererseits auch ein kleiner Winkelversatz zwischen dem Hammergehäuse und der Griffeinrichtung möglich, was insbesondere das Auftreten von Querschwingungen am Handgriff verringert.Advantageously, the Wälzkörpereinrichtung granted a defined spring property transversely to the working direction, ie transversely to the longitudinal or direction of impact. As a result, the grip device, in addition to the linear mobility, is also movable transversely to the working direction relative to the hammer housing. Of course, the transverse mobility should be significantly less than the longitudinal mobility to allow a good guidance of the hammer on the handle device or on the one or more handles. As a result, on the other hand, a small angular offset between the hammer housing and the handle device is possible, which reduces in particular the occurrence of transverse vibrations on the handle.
Bei einer bevorzugten Ausführungsform der Erfindung weist die Wälzkörpereinrichtung mehrere Wälzkörper auf, die an der Griffeinrichtung drehbar befestigt sind und denen an der Außenseite des Hammergehäuses vorgesehene Führungsbahnen zugeordnet sind. Die Wälzkörper können dementsprechend auf den Führungsbahnen des Hammergehäuses abrollen, wodurch eine sehr einfache, robuste Linearführung erreicht wird. Außer den Führungsbahnen, die Bestandteil des Hammergehäuses sein können, ist auf der Hammergehäuseseite kein zusätzlicher Bauaufwand zu treiben. Die Wälzkörper können Zukaufteile sein, die in einfacher Weise an der Innenseite der Griffeinrichtung befestigt werden können. Da die im Handel erhältlichen Wälzkörper, z. B. Kunststoffrollen, üblicherweise bereits mit Lagern (Gleitlager, Wälzlager) ausgestattet sind, lässt sich der zusätzliche Bauaufwand gering halten.In a preferred embodiment of the invention, the Wälzkörpereinrichtung a plurality of rolling elements, which are rotatably mounted on the handle device and which are assigned to the outside of the hammer housing provided guideways. The rolling elements can accordingly roll on the tracks of the hammer housing, whereby a very simple, robust linear guide is achieved. Apart from the guideways, which may be part of the hammer housing, there is no additional construction work to be done on the hammer housing side. The rolling elements may be purchased parts that can be easily attached to the inside of the grip device. Since the commercially available rolling elements, eg. As plastic rollers, usually already equipped with bearings (plain bearings, roller bearings), the additional construction costs can be kept low.
Vorteilhafterweise werden die Wälzkörper jeweils durch eine Federeinrichtung mit einer definierten Kraft gegen die Führungsbahnen gehalten. Die Federeinrichtung kann dementsprechend jeweils zwischen den Wälzkörpern und der Griffeinrichtung vorgesehen sein. Damit ist es möglich, die Querbeweglichkeit der Griffeinrichtung relativ zu dem Hammergehäuse präzise einzustellen.Advantageously, the rolling elements are each held by a spring device with a defined force against the guideways. The spring device can accordingly be provided in each case between the rolling elements and the grip device. This makes it possible, the transverse mobility the grip device to adjust precisely relative to the hammer housing.
Bei einer alternativen bzw. ergänzenden Ausführungsform weisen die Wälzkörper eine definierte Federeigenschaft und damit eine Verformbarkeit in ihre Radialrichtung auf. Dies ist insbesondere dann möglich, wenn die Wälzkörper aus einem elastischen Kunststoffmaterial bestehen oder wenigstens eine Lauffläche aus Kunststoff aufweisen. In diesem Fall können die Wälzkörper mittels Lager direkt an der Griffeinrichtung befestigt werden. Aufgrund der elastischen Verformbarkeit der Wälzkörper relativ zu den Führungsbahnen, auf denen die Wälzkörper abrollen, ist eine ausreichende guerbeweglichkeit der Griffeinrichtung relativ zu dem Hammergehäuse hergestellt.In an alternative or supplementary embodiment, the rolling elements have a defined spring property and thus a deformability in their radial direction. This is particularly possible if the rolling elements consist of an elastic plastic material or at least have a running surface made of plastic. In this case, the rolling elements can be attached directly to the grip device by means of bearings. Due to the elastic deformability of the rolling elements relative to the guideways on which the rolling elements roll, sufficient gripper mobility of the gripping device relative to the hammer housing is produced.
Vorteilhafterweise ist zwischen dem Hammergehäuse und der Griffeinrichtung eine in Arbeitsrichtung wirkende Längsfedereinrichtung vorgesehen. Die Längsfedereinrichtung, die außer Federelementen auch Dämpfereinrichtungen umfassen kann, gewährleistet eine zuverlässige Schwingungsentkopplung der im Betrieb des Hammers auftretenden Schwingungen. Dadurch wird erreicht, dass die Griffeinrichtung und insbesondere der an der Griffeinrichtung vorgesehene Handgriff nur geringe Schwingungen auf den Bediener überträgt. Als Dämpfungseinrichtung eignen sich passive Elemente (z. B. Gummipuffer) sowie auch aktive oder semi-aktive Dämpfungs- bzw. Entkopplungseinrichtungen.Advantageously, a longitudinal spring device acting in the working direction is provided between the hammer housing and the gripping device. The longitudinal spring device, which may include damper devices in addition to spring elements, ensures a reliable vibration isolation of the vibrations occurring during operation of the hammer. This ensures that the handle device and in particular the handle provided on the handle transmits only small vibrations to the operator. Suitable damping devices are passive elements (eg rubber buffers) as well as active or semi-active damping or decoupling devices.
Vorteilhafterweise ist die Erstreckung des Hammergehäuses in Arbeitsrichtung größer als in eine Richtung quer zu der Arbeitsrichtung. Dadurch weist der Hammer eine längliche Erstreckung auf, was der Möglichkeit der Längsführung zwischen Griffeinrichtung und Hammergehäuse zugute kommt.Advantageously, the extent of the hammer housing in the working direction is greater than in a direction transverse to the working direction. As a result, the hammer has an elongated extension, which benefits the possibility of longitudinal guidance between the gripping device and the hammer housing.
Bei einer besonders vorteilhaften Ausführungsform der Erfindung weist das Hammergehäuse wenigstens in einem sich in Arbeitsrichtung erstreckenden Gehäuse-Teilbereich eine sich nicht ändernde Außen-Querschnittsform auf. In diesem Gehäuse-Teilbereich lassen sich dann in einfacher Weise die Führungsbahnen vorsehen. Auf diese Weise kann z. B. für das Hammergehäuse ein stranggepresster Führungszylinder verwendet werden, dessen gleichmäßige Außenkontur nur eine geringe Bearbeitung zum Herstellen der Führungsbahnen erfordert. Bei entsprechender Fertigungsqualität können sogar die Führungsbahnen bereits beim Strangpressen hergestellt werden, was eine beträchtliche Verminderung der Herstellkosten mit sich bringt. Im Idealfall ist es auf diese Weise möglich, dass die am Hammergehäuse vorgesehenen Bestandteile der Führungseinrichtung ohne zusätzlichen Fertigungsaufwand herstellbar sind.In a particularly advantageous embodiment of the invention, the hammer housing at least in a extending in the direction of housing housing portion on a non-changing outer cross-sectional shape. In this housing portion can then provide the guideways in a simple manner. In this way, z. B. for the hammer housing an extruded guide cylinder can be used, the uniform outer contour only a small amount of machining for producing the guideways requires. With appropriate manufacturing quality even the guideways can already be produced during extrusion, which brings a considerable reduction in manufacturing costs. Ideally, it is possible in this way that the provided on the hammer housing components of the guide device can be produced without additional manufacturing effort.
Sofern es sich bei dem Gehäuse-Teilbereich um den Führungszylinder für das Schlagwerk handelt, lässt sich zudem in vorteilhafter Weise das Schlagwerk in dem Gehäuse-Teilbereich anordnen.If the housing subregion is the guide cylinder for the impact mechanism, the striking mechanism can also be advantageously arranged in the housing subregion.
Bei einer bevorzugten Ausführungsform der Erfindung ist die Außen-Querschnittsform des Hammergehäuses im Wesentlichen prismatisch gestaltet. Dabei können eine oder mehrere Kanten des Prismas von den an der Griffeinrichtung befestigten Wälzkörpern übergriffen werden.In a preferred embodiment of the invention, the outer cross-sectional shape of the hammer housing is designed substantially prismatic. In this case, one or more edges of the prism can be overlapped by the rolling elements attached to the gripping device.
Die Griffeinrichtung stellt eine Art Träger für den oder die Handgriffe dar. Bei einer besonders vorteilhaften Weiterentwicklung der Erfindung ist die Griffeinrichtung als Griffhaube ausgeführt, die wenigstens einen Teil des Hammergehäuses umgibt. Die Griffhaube kann dabei hauben- bzw. schalenförmig das Hammergehäuse umschließen, wie dies z. B. aus der
Diese und weitere Vorteile und Merkmale der Erfindung werden nachfolgend unter Zuhilfenahme der begleitenden Figuren näher erläutert. Es zeigen:
- Fig. 1
- einen erfindungsgemäßen Aufbruch- und/oder Bohrhammer (Hammer) in seitlicher Gesamtansicht;
- Fig. 2
- den Hammer aus
Fig. 1 , wobei eine vordere Abdeckung einer Griffhaube entfernt ist; und - Fig. 3
- einen Schnitt entlang der Linie III-III in
Fig. 2 .
- Fig. 1
- a demolition and / or hammer drill (hammer) according to the invention in a lateral overall view;
- Fig. 2
- the hammer off
Fig. 1 wherein a front cover of a handle cover is removed; and - Fig. 3
- a section along the line III-III in
Fig. 2 ,
An der Außenseite der Griffhaube 1 sind zwei Handgriffe 3 angebracht, an denen ein Bediener den Hammer halten kann. Am unteren Ende der Griffhaube 1 bzw. des Hammergehäuses 2 tritt eine Werkzeugaufnahme 4 aus, in der in bekannter Weise ein Werkzeug, z. B. ein Bohrer oder ein Meißel befestigbar ist.On the outside of the
Ein derartiger Aufbau ist prinzipiell bereits aus der
Das Hammergehäuse 2 weist ein Antriebsgehäuse 5 auf, in dem in bekannter Weise ein motorischer Antrieb, ein Kurbeltrieb, etc. vorgesehen sind. Unterhalb von dem Antriebsgehäuse 5 ist ein ebenfalls zum Hammergehäuse 2 gehörendes Schlagwerkgehäuse 6 angeordnet, in dem aus der durch den Motor erzeugten Antriebsbewegung eine Schlagbewegung erzeugt wird, die schließlich auf das nicht dargestellte Werkzeug aufgebracht wird. Die Funktionsweise eines derartigen Hammers ist bekannt und soll daher an dieser Stelle nicht weiter vertieft werden.The
Zwischen der Griffhaube 1 und dem aus Kunststoff oder Metall bestehenden Hammergehäuse 2 ist eine Führungseinrichtung 7 vorgesehen, die wenigstens eine lineare Führung der Griffhaube 1 relativ zu dem Hammergehäuse 2 in Arbeitsrichtung A (Schlagrichtung, Längsrichtung) des Hammers, vorzugsweise aber auch eine Führung der Griffhaube 1 relativ zu dem Hammergehäuse 2 quer zu der Arbeitsrichtung und in eine Drehrichtung um die in Arbeitsrichtung liegende Schlagachse ermöglicht.Between the
Die Führungseinrichtung 7 weist eine Wälzkörpereinrichtung 8 auf, die mehrere Wälzkörper 9 umfasst. Bei dem in
Die Wälzkörper 9 sind auf der Innenseite der Griffhaube 1 drehbar befestigt. Bei den Wälzkörpern 9 kann es sich um Zukaufteile handeln.
Die Kunststoffrollen 9a wälzen über Führungsbahnen 12 ab, die an der Außenseite des Hammergehäuses parallel zur Längsrichtung A verlaufen. Wenn es sich bei dem Hammergehäuse 2 bzw. dem Schlagwerkgehäuse 6 um ein Strangpressprofil handelt, wie z. B. in
Um eine möglichst gute Führung zwischen Griffhaube 1 und Hammergehäuse 2 zu erreichen, insbesondere um eine ausreichende Kippstabilität zu gewährleisten, ist es zweckmäßig, wenn sich das Hammergehäuse 2, insbesondere dass zum Hammergehäuse 2 gehörende Schlagwerkgehäuse 6 in Längsrichtung stärker erstreckt als in einer Richtung quer dazu. Dies ist auch aus
Bei einer in den Figuren nicht gezeigten Ausführungsform sind die Wälzkörpereinrichtungen 8 jeweils durch eine Federeinrichtung auf der Innenseite der Griffhaube 1 gehalten, wodurch die Wälzkörper 9 bzw. die Kunststoffrollen 9a mit einer definierten Kraft gegen die Führungsbahnen 12 gedrückt werden. Dadurch lässt sich die Querbeweglichkeit der Griffhaube 1 relativ zu dem Hammergehäuse 2 besonders präzise einstellen.In one embodiment, not shown in the figures, the
Die Kunststoffrollen 9a können vorzugsweise auch aus einem elastischen Material bestehen, so dass sie eine gewisse Verformbarkeit in ihr Radialrichtung aufweisen. Dadurch ist es möglich, dass die Griffhaube 1 auch quer zu dem Hammergehäuse 2, gegen die Federwirkung des elastischen Materials der Kunststoffrollen 9a bewegbar ist.The plastic rollers 9a may preferably also be made of an elastic material, so that they have a certain deformability in their radial direction. This makes it possible that the
Zur Verbesserung der Schwingungsentkopplung der Griffhaube 1, insbesondere Isolation der in dem Hammergehäuse 2 beim Betrieb des Hammers wirkenden Schwingungen, ist zwischen Griffhaube 1 und Hammergehäuse 2 eine Längsfedereinrichtung 13 vorgesehen. Die Längsfedereinrichtung 13 umfasst Federn, die vorgespannt sein können, so dass die Griffhaube 1 erst nach Überwindung der Vorspannungswirkung relativ zu dem Hammergehäuse 2 bewegbar ist. Die Längsfedereinrichtung 13 stellt dabei sicher, dass die Griffhaube 1 nach Entlastung in den Ausgangszustand relativ zu dem Hammergehäuse 2 zurückkehrt.To improve the vibration decoupling of the
Die Längsfedereinrichtung 13 kann darüber hinaus auch Dämpfungselemente aufweisen, die eine Anpassung der Dämpfungswirkung ermöglichen. Bei diesen Dämpfungselementen kann es sich um passive, aktive oder semi-aktive Dämpfer bzw. Entkopplungseinrichtungen handeln, die als solche bereits aus dem Stand der Technik bekannt sind.The
Wie insbesondere aus
Wie ebenfalls aus
Selbstverständlich können auch umgekehrt die Führungsbahnen 12 Vertiefungen bilden, in denen die Kunststoffrollen 9a seitlich geführt abrollen.Of course, conversely, the
Umgekehrt kann es auch zweckmäßig sein, die Wälzkörper 9 mit geringstmöglichen Reibwerten zu drehen, um die Schwingungsisolation durch andere Elemente, insbesondere durch die Längsfedereinrichtung 13, zu gewährleisten.Conversely, it may also be appropriate to rotate the rolling
Da zwischen der Griffhaube 1 und dem Hammergehäuse 2 nahezu ausschließlich Wälzbewegungen bei möglichst geringen Gleitbewegungen stattfinden, lässt sich der Verschleiß minimieren. Dies ist insbesondere deshalb bedeutend, weil die Griffhaube 1 an ihrer Unterseite nicht abgedichtet ist, so dass dort im Betrieb des Hammers Staub, Schmutz und Feuchtigkeit eindringen können. Selbstverständlich sollten aber die Wälzkörper 8 und insbesondere deren Gleitlager oder Wälzlager 10 in handelsüblicher Weise abgedichtet sein. Eine zusätzliche Abdichtung des Führungsbereichs, insbesondere der Führungsbahnen 12 ist jedoch nicht erforderlich.Since take place almost exclusively rolling movements with minimal sliding movements between the
Die Ausführungsform wurde anhand eines Hammers mit Griffhaube 1 erläutert. Anstelle der Griffhaube 1 kann auch ein anders gestalteter Träger für den oder die Handgriffe 3 verwendet werden. Z. B. ist es nicht erforderlich, dass der Träger das Hammergehäuse haubenförmig umgibt. Vielmehr kann auch eine offene Gestaltung, z. B. eine Käfigkonstruktion verwendet werden.The embodiment has been explained with reference to a hammer with
Claims (14)
- Percussion hammer and/or hammer drill, having- a hammer housing (2) in which at least one part of a drive (5) and a striking mechanism (6) are disposed,- a gripping device (1) which can move relative to the hammer housing (2) in an operating direction (A) and on which at least one handle (3) is provided, and having- a guide device (7) for linearly guiding the gripping device (1) relative to the hammer housing (2),characterised in that the guide device (7) comprises a rolling body device (8) which acts between the hammer housing (2) and the gripping device (1), wherein minimal friction values can be produced which permit effective relative movement between the gripping device (1) and the hammer housing (2).
- Percussion hammer and/or hammer drill as claimed in Claim 1, characterised in that the guide device (7), relating to the operating direction (A) is provided laterally on the hammer housing (2).
- Percussion hammer and/or hammer drill as claimed in Claim 1 or 2, characterised in that- the gripping device (1) surrounds the hammer housing (2) with a spaced disposition so that an intermediate space is formed, and in that- the guide device (7) is disposed in the intermediate space between the hammer housing (2) and the gripping device (1).
- Percussion hammer and/or hammer drill as claimed in any one of Claims 1 to 3,
characterised in that the rolling body device (8) imparts a defined spring characteristic transverse to the operating direction (A) such that the gripping device (1) can move relative to the hammer housing (2) in a transverse manner with respect to the operating direction (A). - Percussion hammer and/or hammer drill as claimed in any one of Claims 1 to 4, characterised in that the rolling body device (8) comprises rolling bodies (9) which are rotatably attached to the gripping device (1) and are allocated guide tracks (12) provided on the outer side of the hammer housing (2), or the rolling bodies are rotatably attached to the hammer housing (2) and are allocated guide tracks (12) provided on the inner side of the gripping device (1).
- Percussion hammer and/or hammer drill as claimed in Claim 5, characterised in that the rolling bodies (9) are each held against the guide tracks (12) with a defmed force by a spring device or by the resilient effect of the gripping device (1).
- Percussion hammer and/or hammer drill as claimed in Claim 5 or 6, characterised in that the rolling bodies (8, 9) have a defined spring characteristic and thus a deformability in their radial direction.
- Percussion hammer and/or hammer drill as claimed in any one of Claims 1 to 7, characterised in that a longitudinal spring device (13) is provided which acts in the operating direction (A) between the hammer housing (2) and the gripping device (1).
- Percussion hammer and/or hammer drill as claimed in any one of Claims 1 to 8, characterised in that the extension of the hammer housing (2) in the operating direction (A) is greater than in a direction transverse to the operating direction (A).
- Percussion hammer and/or hammer drill as claimed in any one of Claims 1 to 9, characterised in that the hammer housing (2) has a constant outer cross-sectional shape at least in a housing partial region (6) extending in the operating direction (A).
- Percussion hammer and/or hammer drill as claimed in Claims 5 and 10, characterised in that the guide tracks (12) are provided in the housing partial region (6).
- Percussion hammer and/or hammer drill as claimed in any one of Claims 10 or 11, characterised in that the striking mechanism is disposed in the housing partial region (6).
- Percussion hammer and/or hammer drill as claimed in any one of Claims 10 to 12, characterised in that the outer cross-sectional form corresponds substantially to a prism shape, and in that at least one of the rolling bodies (9) engages over an edge of the prism shape.
- Percussion hammer and/or hammer drill as claimed in any one of Claims 1 to 13, characterised in that the gripping device is formed as a gripping hood (1) which surrounds at least one part of the hammer housing (2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10357758A DE10357758A1 (en) | 2003-12-10 | 2003-12-10 | Break-away and / or rotary hammer with linearly guided grip device |
PCT/EP2004/013338 WO2005056244A1 (en) | 2003-12-10 | 2004-11-24 | Percussion hammer and/or drill hammer comprising a handle which can be guided in a linear manner |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1691954A1 EP1691954A1 (en) | 2006-08-23 |
EP1691954B1 true EP1691954B1 (en) | 2008-10-01 |
Family
ID=34672556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04803257A Not-in-force EP1691954B1 (en) | 2003-12-10 | 2004-11-24 | Percussion hammer and/or drill hammer comprising a handle which can be guided in a linear manner |
Country Status (7)
Country | Link |
---|---|
US (1) | US20080190632A1 (en) |
EP (1) | EP1691954B1 (en) |
JP (1) | JP4686473B2 (en) |
CN (1) | CN100471631C (en) |
DE (2) | DE10357758A1 (en) |
ES (1) | ES2311869T3 (en) |
WO (1) | WO2005056244A1 (en) |
Families Citing this family (12)
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US8047302B2 (en) * | 2001-12-21 | 2011-11-01 | Wacker Neuson Produktion GmbH & Co. KG | Drilling and/or striking hammer with a lubricating device |
DE102004047606A1 (en) * | 2004-09-30 | 2006-04-06 | Hilti Ag | Drill and / or chisel hammer |
DE102006000253A1 (en) * | 2006-05-30 | 2007-12-06 | Hilti Ag | Striking hand tool with axially movable percussion |
DE102007037048A1 (en) * | 2007-08-06 | 2009-02-12 | Robert Bosch Gmbh | Auxiliary handle device |
DE102008050323A1 (en) * | 2008-10-04 | 2010-04-08 | Protool Gmbh | Hand machine tool with a handle arrangement |
WO2010054442A1 (en) * | 2008-11-17 | 2010-05-20 | Darren William Lacy | Apparatus and methods for inserting a fastener |
JP6125392B2 (en) | 2013-09-27 | 2017-05-10 | 株式会社マキタ | Impact tool |
JP6188593B2 (en) * | 2014-01-21 | 2017-08-30 | 株式会社マキタ | Impact tool |
JP6441588B2 (en) * | 2014-05-16 | 2018-12-19 | 株式会社マキタ | Impact tool |
GB2548579B (en) | 2016-03-21 | 2019-06-26 | Webster Tech Limited | A power tool comprising a tool carrier for mounting an impact tool |
GB2564712B (en) | 2017-07-21 | 2020-01-29 | Webster Tech Limited | Power Tool |
CN108677629B (en) * | 2018-07-14 | 2023-11-03 | 徐瀛 | Electric tamping tool |
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-
2003
- 2003-12-10 DE DE10357758A patent/DE10357758A1/en not_active Withdrawn
-
2004
- 2004-11-24 EP EP04803257A patent/EP1691954B1/en not_active Not-in-force
- 2004-11-24 US US10/596,298 patent/US20080190632A1/en not_active Abandoned
- 2004-11-24 JP JP2006543415A patent/JP4686473B2/en not_active Expired - Fee Related
- 2004-11-24 DE DE502004008175T patent/DE502004008175D1/en active Active
- 2004-11-24 WO PCT/EP2004/013338 patent/WO2005056244A1/en active IP Right Grant
- 2004-11-24 CN CNB2004800270359A patent/CN100471631C/en not_active Expired - Fee Related
- 2004-11-24 ES ES04803257T patent/ES2311869T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
US20080190632A1 (en) | 2008-08-14 |
JP4686473B2 (en) | 2011-05-25 |
ES2311869T3 (en) | 2009-02-16 |
CN1863648A (en) | 2006-11-15 |
DE10357758A1 (en) | 2005-07-21 |
DE502004008175D1 (en) | 2008-11-13 |
WO2005056244A1 (en) | 2005-06-23 |
EP1691954A1 (en) | 2006-08-23 |
CN100471631C (en) | 2009-03-25 |
JP2007513784A (en) | 2007-05-31 |
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