EP1726408B1 - Hand-held vibration damping pneumatic hammer - Google Patents
Hand-held vibration damping pneumatic hammer Download PDFInfo
- Publication number
- EP1726408B1 EP1726408B1 EP06450075.4A EP06450075A EP1726408B1 EP 1726408 B1 EP1726408 B1 EP 1726408B1 EP 06450075 A EP06450075 A EP 06450075A EP 1726408 B1 EP1726408 B1 EP 1726408B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- handle body
- working cylinder
- compressed air
- body part
- hammer
- 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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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/006—Vibration damping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/04—Handles; Handle mountings
- B25D17/046—Sleeve-like handles surrounding the tool bit
-
- 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
- B25D17/245—Damping the reaction force using a fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
Definitions
- the invention relates to a hand-held, vibration-damped pneumatic hammer with a handle body and a projecting into this and operatively connected to the handle body working cylinder according to the preambles of claims 1 and 3.
- Pneumatic impact mechanisms such as those used in pneumatic hammers, essentially have a percussion piston which can be moved back and forth in a working cylinder and which cooperates directly or indirectly via an intermediate part with at least one tool.
- the movement of the percussion piston is controlled by compressed air in the working cylinder, which is operatively connected in a hand-held pneumatic hammer with a handle body with handles, which serve as a guide or holding means of an operator.
- Pneumatic hammers with means for damping vibrations are z. B. from the US 1,792,893 discloses a pneumatic hammer according to the preambles of claims 1 and 3, the EP 0 391 613 A2 or the WO 93/20981 known.
- handles In order to reduce the extent of the impact on the handles on the hands and arms of the operator with each blow of the pneumatic hammer, handles have been proposed and used, which are formed spring-back in the direction of impact of the hammer.
- This pivotal handle connection to the handle body significantly reduces the extent of the initiated in the arms of the hammer leading person shocks of the device, because the handles can swing against a spring force by an angle of up to 35 ° in a return movement of the hammer.
- the invention wants to overcome the disadvantages of the generic state of the art and has set itself the goal of creating a hand-held, vibration-damped pneumatic hammer of the type mentioned, which is precisely feasible in the advancing direction or in Hammerachsplatz means rigidly connected to the handle body handles and improved Damping the shock from the cylinder in this has.
- the tool can be precisely positioned because the handles or the fist handle and the handle body form a unit and the working cylinder is displaceable in this unit only in L jossachscardi the hammer or in the direction of impact of the tool , In this direction take place in the impact mode, the recoil, which can be advantageously attenuated by the inventive design of the handle body and cylinder to a high degree.
- At least one damping chamber is formed, which may have a connection to the outside air or the compressed air system in the working rest position of the hammer.
- a displacement of the working cylinder in the handle body is a reduction of the damping space and by closing the same formation of a compression space.
- This compression space is effective as a so-called gas spring, that is, that impacts or abruptly acting forces, a resistance or a counter force is opposed, or starting from zero overproportional with the displacement path of the working cylinder into the handle body into it.
- gas spring that is, that impacts or abruptly acting forces, a resistance or a counter force is opposed, or starting from zero overproportional with the displacement path of the working cylinder into the handle body into it.
- a pressurizable pressurized actuating means is formed, through which the working cylinder to the tool in the handle body is displaceable or adjustable, a work-ready rest position of the hammer is set upon application of the actuating means with compressed air, which is able to ensure a full damping effect for a transmission of shocks in the handle body or in the handles or the fist handle during the subsequent impact operation.
- the adjusting means has at least one in the direction of the tool towards compressed air acted upon annular surface on the working cylinder.
- the recoil forces of the working cylinder counteracting damping force can advantageously be changed path-dependent in their characteristics, if the actuating means at least one further toward tool toward pressure-applied annular surface on the working cylinder to form a further compression chamber, wherein a closure thereof by a displacement of the working cylinder for Controlled handle body switched on, preferably edge-controlled switchable is.
- a flow channel is formed with a small cross section in the guide in the handle body and / or in the cylinder body.
- Fig. 1 shows a schematic representation of a manually operated pneumatic hammer D with a tool W.
- a grip body G has with this rigidly connected handles H.
- Fig. 2 to Fig. 4 are positions of the handle body part 1 relative to the working cylinder 2 for a frontally arranged damping device removable.
- Fig. 2 shows a position of a working cylinder 2 in the handle body part 1 in the standby position of a hammer.
- a damping chamber 3 which laterally has a connecting hollow 31 to the outside atmosphere, is formed on the front side between the handle body part 1 and the working cylinder 2 .
- FIG. 4 Another shift in the direction of the arrow, for example in the impact or drilling operation, as in Fig. 4 is shown, causes a seal of the damping chamber 3 and a formation of a compression chamber 32 in which increases in a reduction of the volume or a continued shift in the direction of arrow, the pressure of the air and in such a damping of shock from the working cylinder 2 relative to the handle body part 1 can be achieved ,
- a vibration damping device described above can also according to the invention include an adjusting means 4 , which supports a spacing of the end faces in a damping chamber 3 .
- An actuating means 4 requires for a function of the same compressed air.
- a compressed air entry into the adjusting system via a compressed air line 41 whereby an annular surface 43 on the working cylinder 2 to the tool out with pressure can be acted upon.
- the pressure causes a relative movement of handle body 1 and cylinder 2 up to a stop such that a front-side damping chamber 3 is increased, which corresponds to a standby position of a hammer and out Fig. 2 is apparent.
- This force acts as long as a compressed air supply takes place and supports a vibration damping.
- an externally open damping chamber 40 (FIG. Fig. 2 ), which forms a compression space 42 in a displacement from the working cylinder 2 in the direction of the arrow into a handle body part 1 ( Fig. 3 ) and a damping force.
- Fig. 5 to Fig. 7 show an operation of a centering actuating means 4, concerning a central position of a working cylinder 2 in a handle body part 1, which is effective when compressed air is applied.
- a compressed air line 41 in the handle body part 1 in the axial direction centric positioning of a working cylinder 2 is closed by this.
- a damping chamber 40 and 40 ' is formed in the axial direction on both sides.
- a part of the damping chamber As shown Fig. 7 It can be seen to form a compression space 42 , which causes or supports a damping of shocks of the working cylinder 2 on the handle body part 1 .
- a centering actuator 4 as in Fig. 5 to Fig. 7 is shown, in both directions of an axial pressurization of a working cylinder 2 vibration damping effect.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Percussive Tools And Related Accessories (AREA)
Description
Die Erfindung bezieht sich auf einen handgeführten, vibrationsgedämpften Drucklufthammer mit einem Griffkörper und einem in diesen einragenden und mit dem Griffkörper wirkverbundenen Arbeitszylinder gemäß den Oberbegriffen der Ansprüche 1 und 3.The invention relates to a hand-held, vibration-damped pneumatic hammer with a handle body and a projecting into this and operatively connected to the handle body working cylinder according to the preambles of
Pneumatische Schlagwerke, wie diese in Drucklufthämmer eingesetzt werden, weisen im Wesentlichen einen in einem Arbeitszylinder hin und her bewegbaren Schlagkolben auf, der direkt oder indirekt über ein Zwischenteil mit zumindest einem Werkzeug zusammenwirkt. Die Bewegung des Schlagkolbens erfolgt gesteuert mit Druckluft im Arbeitszylinder, der bei einem handgeführten Drucklufthammer mit einem Griffkörper mit Haltegriffen wirkverbunden ist, welche als Führungs- bzw. Haltemittel einer Bedienungsperson dienen.Pneumatic impact mechanisms, such as those used in pneumatic hammers, essentially have a percussion piston which can be moved back and forth in a working cylinder and which cooperates directly or indirectly via an intermediate part with at least one tool. The movement of the percussion piston is controlled by compressed air in the working cylinder, which is operatively connected in a hand-held pneumatic hammer with a handle body with handles, which serve as a guide or holding means of an operator.
Drucklufthämmer mit Mitteln zum Dämpfen von Vibrationen sind z. B. aus der
Für die Person, die den Hammer mittels seitlich am Griffkörper positionierten Haltegriffen bedient, sind beim Betrieb des Gerätes Rückwirkungen der Schläge auf die Hände und Arme gegeben, welche Schläge und Vibrationen oftmals als störend empfunden werden und diese Gliedmaßen durch Erschütterungen, insbesondere bei einer Langzeitbedienung zusätzlich erheblich belasten und gesundheitsgefährdend sein können.For the person who operates the hammer by means of handles positioned laterally on the grip body, the impact of the blows on the hands and arms during operation of the device is very high, which bumps and vibrations are often perceived as disturbing and these limbs are additionally damaged by vibrations, in particular during long-term operation significantly burden and can be hazardous to health.
Um das Ausmaß des Stoßes über die Haltegriffe auf die Hände und Arme der Bedienungsperson bei jedem Schlag des Drucklufthammers zu verringern, wurden schon Griffe vorgeschlagen und eingesetzt, die in Schlagrichtung des Hammers rückfedernd schwenkbar ausgebildet sind. Diese schwenkbare Griffanbindung an den Griffkörper vermindert wesentlich das Ausmaß der in die Arme der hammerführenden Person eingeleiteten Stöße des Gerätes, weil die Griffe gegen eine Federkraft um einen Winkel von bis zu 35° bei einer Rückbewegung des Hammers einschwenken können.In order to reduce the extent of the impact on the handles on the hands and arms of the operator with each blow of the pneumatic hammer, handles have been proposed and used, which are formed spring-back in the direction of impact of the hammer. This pivotal handle connection to the handle body significantly reduces the extent of the initiated in the arms of the hammer leading person shocks of the device, because the handles can swing against a spring force by an angle of up to 35 ° in a return movement of the hammer.
Es ist allerdings festzustellen, dass ein Einschwenken der Griffe in Bezug auf die Hammerachse eine genau kontrollierbare Führung des Hammers im Schlagbetrieb erschwert. Auch kann eine Belastung der Arme der Bedienungsperson durch Vibrationen und Schläge oft nicht ausreichend unterdrückt werden, weil für eine Anstellung des Gerätes im Vortrieb eine entsprechende Kraft erforderlich ist, die erst bei Überschreitung derselben durch einen Rückstoß zu einem Einschwenken der Haltegriffe führt.
Hier will die Erfindung die Nachteile im gattungsgemäßen Stand der Technik überwinden und setzt sich zum Ziel, einen handgeführten, vibrationsgedämpften Drucklufthammer der eingangs genannten Art zu schaffen, welcher in Vortriebsrichtung bzw. in Hammerachsrichtung mittels starr mit dem Griffkörper verbundenen Griffen präzise führbar ist und eine verbesserte Dämpfung der Schläge vom Arbeitszylinder in diese aufweist.It should be noted, however, that pivoting the handles with respect to the hammer axis makes it difficult to control the hammer accurately during impact operation. Also, a burden on the arms of the operator can often not be sufficiently suppressed by vibrations and shocks, because for employment of the Device in the advance a corresponding force is required, which only leads to a swinging in the handles when they are exceeded by a recoil.
Here, the invention wants to overcome the disadvantages of the generic state of the art and has set itself the goal of creating a hand-held, vibration-damped pneumatic hammer of the type mentioned, which is precisely feasible in the advancing direction or in Hammerachsrichtung means rigidly connected to the handle body handles and improved Damping the shock from the cylinder in this has.
Dieses Ziel wird erfindungsgemäß durch einen Drucklufthammer gemäß Anspruch 1 erreicht.This object is achieved by a pneumatic hammer according to
Die derart erzielten Vorteile sind im Wesentlichen darin zu sehen, dass das Werkzeug präzise positioniert werden kann, weil die Griffe oder der Faustgriff und der Griffkörper eine Einheit bilden und der Arbeitszylinder in dieser Einheit nur in Längsachsrichtung des Hammers bzw. in Schlagrichtung des Werkzeuges verschiebbar ist. In dieser Richtung erfolgen im Schlagbetrieb die Rückstöße, welche durch die erfindungsgemäße Ausbildung von Griffkörper und Arbeitszylinder vorteilhaft in hohem Maße gedämpft werden können.The advantages thus achieved are to be seen essentially in the fact that the tool can be precisely positioned because the handles or the fist handle and the handle body form a unit and the working cylinder is displaceable in this unit only in Längsachsrichtung the hammer or in the direction of impact of the tool , In this direction take place in the impact mode, the recoil, which can be advantageously attenuated by the inventive design of the handle body and cylinder to a high degree.
Durch die geometrische Ausformung von Griffkörper und Arbeitszylinder ist mindestens ein Dämpfungsraum gebildet, der in der arbeitsbereiten Ruhestellung des Hammers eine Verbindung zur Außenluft oder zum Druckluftsystem aufweisen kann. Durch eine Verschiebung des Arbeitszylinders im Griffkörper erfolgt eine Verkleinerung des Dämpfungsraumes und durch Verschluss desselben eine Bildung eines Kompressionsraumes.Due to the geometric shape of handle body and cylinder at least one damping chamber is formed, which may have a connection to the outside air or the compressed air system in the working rest position of the hammer. By a displacement of the working cylinder in the handle body is a reduction of the damping space and by closing the same formation of a compression space.
Dieser Kompressionsraum ist als so genannte Gasfeder wirksam, das heißt, dass Schlägen bzw. schlagartig wirksam werdenden Kräfte ein Widerstand bzw. eine Gegenkraft entgegengesetzt wird, der bzw. die von Null ausgehend überproportional mit dem Verschiebungsweg des Arbeitszylinders in den Griffkörper hinein größer wird. Derart kann eine Dämpfung der Vibrationen besonders effizient bzw. eine weitgehende Vermeidung einer Übertragung von Stößen in die Haltegriffe des Hammers erfindungsgemäß erreicht werden.This compression space is effective as a so-called gas spring, that is, that impacts or abruptly acting forces, a resistance or a counter force is opposed, or starting from zero overproportional with the displacement path of the working cylinder into the handle body into it. In this way, it is possible according to the invention to achieve attenuation of the vibrations particularly efficiently or to largely avoid transmission of shocks to the handles of the hammer.
Wenn von Teilen des Griffkörpers und Arbeitszylinders ein mit Druckluft beaufschlagbares Stellmittel gebildet ist, durch welches der Arbeitszylinder zum Werkzeug hin im Griffkörper verschiebbar bzw. anstellbar ist, wird bei Beaufschlagung des Stellmittels mit Druckluft eine arbeitsbereite Ruhestellung des Hammers eingerichtet, welche beim anschließenden Schlagbetrieb unmittelbar eine volle Dämpfwirkung für eine Übertragung von Schlägen in den Griffkörper bzw. in die Haltegriffe oder den Faustgriff sicherzustellen vermag.If parts of the handle body and working cylinder a pressurizable pressurized actuating means is formed, through which the working cylinder to the tool in the handle body is displaceable or adjustable, a work-ready rest position of the hammer is set upon application of the actuating means with compressed air, which is able to ensure a full damping effect for a transmission of shocks in the handle body or in the handles or the fist handle during the subsequent impact operation.
Dabei ist es für eine einfache und wirtschaftliche Ausführungsform des Hammers günstig, wenn das Stellmittel mindestens eine in Richtung zum Werkzeug hin mit Druckluft beaufschlagbare Ringfläche am Arbeitszylinder aufweist.It is favorable for a simple and economical embodiment of the hammer when the adjusting means has at least one in the direction of the tool towards compressed air acted upon annular surface on the working cylinder.
Die den Rückstößen des Arbeitszylinders entgegengerichtete Dämpfungskraft kann mit Vorteil wegabhängig in ihrer Charakteristik verändert werden, wenn das Stellmittel mindestens eine weitere in Richtung Werkzeug hin mit Druck beaufschlagbare Ringfläche am Arbeitszylinder zur Bildung eines weiteren Kompressionsraumes aufweist, wobei ein Verschluss desselben durch eine Verschiebung des Arbeitszylinders zum Griffkörper hin gesteuert zuschaltbar, vorzugsweise kantengesteuert zuschaltbar ist.The recoil forces of the working cylinder counteracting damping force can advantageously be changed path-dependent in their characteristics, if the actuating means at least one further toward tool toward pressure-applied annular surface on the working cylinder to form a further compression chamber, wherein a closure thereof by a displacement of the working cylinder for Controlled handle body switched on, preferably edge-controlled switchable is.
In einer alternativen Variante der Erfindung gemäß Anspruch 3 ist vorgesehen, dass von Teilen des Griffkörpers und des Arbeitszylinders ein mit Druckluft beaufschlagbares, hinsichtlich des Verschiebeweges in Hammerachsrichtung zentrierendes Stellmittel mit beidseitig einer Druckluftzuführung angeordneten Dämpfungsräumen gebildet ist, wobei durch eine Verschiebung des Arbeitszylinders aus der Mittelstellung jeweils ein Druckluftweg in den gegenüberliegenden Dämpfungsraum freigebbar und zumindest eine Ringfläche der Verschiebung entgegengesetzt am Arbeitszylinder mit Druckluft beaufschlagbar ist und bei einer weitergehenden Verschiebung des Arbeitszylinders ein im Wesentlichen geschlossener Hohlraum bzw. Kompressionsraum mit einem durch eine weitere gleichgerichtete Verschiebung verkleinerbarem Volumen ausbildbar ist.In an alternative variant of the invention according to claim 3 it is provided that of parts of the handle body and the working cylinder acted upon by compressed air, with respect to the displacement in Hammerachsrichtung centering adjusting means with both sides of a compressed air supply arranged damping chambers is formed by a displacement of the working cylinder from the center position in each case one compressed air path in the opposite damping chamber can be released and at least one annular surface of the opposite displacement on the working cylinder can be acted upon with compressed air and at a further displacement of the working cylinder, a substantially closed cavity or compression space can be formed with a volume reducible by a further rectified displacement volume.
Durch diese erfindungsgemäße Ausführungsform kann einerseits eine Dämpfung mit progressiv wirkender Gegenkraft zum Schlag des Arbeitszylinders in beide Achsrichtungen in günstiger Weise erreicht werden, wodurch Vorteile auch beim Rückziehen des Gerätes gegeben sind. Andererseits besitzt diese Gestaltung von Griffkörper und Arbeitszylinder hinsichtlich der Bearbeitung der Teile wirtschaftliche Vorteile und bietet eine optimale Form einer Vibrationsdämpfung eines handgeführten Drucklufthammers.By means of this embodiment according to the invention, on the one hand damping with progressively acting counterforce to the stroke of the working cylinder in both axial directions can be achieved in a favorable manner, whereby advantages are also given when retracting the device. On the other hand, this design of handle body and cylinder has economic advantages in terms of machining of the parts and provides an optimal form of vibration damping a hand-held pneumatic hammer.
Zur raschen Funktion des zentrierenden Stellmittels ist von Vorteil, wenn vom Dämpfungsraum zur Umgebungsluft ein Strömungskanal mit geringem Querschnitt im Bereich der Führung im Griffkörper und/oder im Zylinderkörper gebildet ist.For rapid operation of the centering actuating means is advantageous if from Damping space to the ambient air, a flow channel is formed with a small cross section in the guide in the handle body and / or in the cylinder body.
Im Folgenden wird die Erfindung anhand von lediglich jeweils einem Ausführungsweg derselben darstellenden Zeichnungen näher erläutert.In the following the invention will be explained in more detail with reference to only one embodiment of the same performing drawings.
Es zeigen:
- Fig. 1A
- handgeführter Drucklufthammer oder Druckluftbohrhammer mit Griffen;
- Fig. 1B
- handgeführter Drucklufthammer oder Druckluftbohrhammer mit Faustgriff;
- Fig. 2 bis Fig. 4
- stirnseitig angeordnete Dämpfungseinrichtung mit Stellmittel;
- Fig. 5 bis Fig. 7
- zentrierendes Stellmittel mit Dämpfungseinrichtung.
- Fig. 1A
- hand-held pneumatic hammer or pneumatic hammer drill with handles;
- Fig. 1B
- hand-held pneumatic hammer or pneumatic hammer drill with fist grip;
- Fig. 2 to Fig. 4
- frontally arranged damping device with adjusting means;
- Fig. 5 to Fig. 7
- centering actuating means with damping device.
Nachfolgend ist eine Bezugszeichenliste für die Teile in den Darstellungen zusammengestellt.
- D
- Drucklufthammer
- G
- Griffkörper
- H
- Haltegriffe
- F
- Faustgriff
- W
- Werkzeuge
- 1
- Griffkörperteil
- 2
- Arbeitszylinder
- 3
- Dämpfungsraum
- 31
- Verbindungshohl
- 32
- Kompressionsraum
- 4
- Stellmittel
- 40, 40'
- Dämpfungsraum
- 41
- Druckluftleitung
- 42
- Kompressionsraum
- 43, 43'
- Ringfläche
- 5
- Strömungskanal
- D
- Drucklufthammer
- G
- handle
- H
- handholds
- F
- fist grip
- W
- Tools
- 1
- Grip body
- 2
- working cylinder
- 3
- damping space
- 31
- connection hollow
- 32
- compression chamber
- 4
- actuating means
- 40, 40 '
- damping space
- 41
- Compressed air line
- 42
- compression chamber
- 43, 43 '
- ring surface
- 5
- flow channel
Aus
Bei einer geringen Druckbeaufschlagung vom Arbeitszylinder 2 in Pfeilrichtung erfolgt, wie in
Eine weitere Verschiebung in Pfeilrichtung, beispielsweise im Schlag- oder Bohrbetrieb, wie dies in
Ein Verbringen eines Hammers in eine Bereitschaftsposition bewirkt eine Öffnung vom Verbindungshohl 31 und einen Lufteintritt in den Dämpfungsraum 3 mit einer Positionierung von Griffkörperteil 1 und Arbeitszylinder 2, wie dies in
Eine oben beschriebene Einrichtung zur Vibrationsdämpfung kann auch erfindungsgemäß ein Stellmittel 4 beinhalten, welches ein Beabstanden der Stirnflächen in einem Dämpfungsraum 3 unterstützt.A vibration damping device described above can also according to the invention include an adjusting means 4 , which supports a spacing of the end faces in a damping chamber 3 .
Ein Stellmittel 4, wie aus
Weiters kann im Bereich eines Stellmittels 4 auch ein nach außen offener Dämpfungsraum 40 (
Wie in
Wird nun, wie in
Bei vergrößerter Anstellkraft in Pfeilrichtung und im Schlagbetrieb des Hammers kann ein Teil vom Dämpfungsraum, wie aus
Ein zentrierendes Stellmittel 4, wie in
Claims (4)
- A hand-held, vibration-damped pneumatic hammer (D) with a handle body (G) and a working cylinder (2) projecting into this handle body (G) and being operatively connected to the handle body (G), wherein a handle body part (1) and the working cylinder (2) are displaceable relative to one another guided in the longitudinal axial direction of the hammer (D), wherein an actuating means (4) that can be acted upon by compressed air is constituted by parts of the handle body part (1) and the working cylinder (2), by means of which actuating means the working cylinder (2) can be displaced or advanced towards the tool in the handle body part (1) and wherein at least one damping chamber (3), which can be aerated or acted upon by compressed air, is formed between one end of the working cylinder (2) and the handle body part (1) and at least one damping chamber (40), which can be aerated or acted upon by compressed air, is formed between a circumferential surface of the working cylinder (2) and the handle body part (1), at least one damping chamber (3, 40), which can be aerated or acted upon by compressed air, being formed, characterised in that, as a result of a displacement of the working cylinder (2) in the handle body part (1) out of the standby position with the cooperation of components of these parts in the region of the damping chambers (3, 40), a closed hollow space or compression chamber (32, 42) with a volume reducible in size by a further displacement in the same direction is formed.
- The pneumatic hammer (D) according to claim 1, characterised in that the actuating means (4) comprises at least one annular surface (43) on the working cylinder (2), said annular surface being able to be acted upon by compressed air in the direction towards the tool.
- The hand-held, vibration-damped pneumatic hammer (D) with a handle body (G) and a working cylinder (2) projecting into this handle body (G) and being operatively connected to the handle body (G), wherein a handle body part (1) and the working cylinder (2) are displaceable relative to one another guided in the longitudinal axial direction of the hammer (D), characterised in that parts of the handle body part (1) and the working cylinder (2) form an actuating means (4), which can be acted upon by compressed air and is centring with respect to the displacement path in the hammer axial direction, said actuating means having a compressed air supply (41) on both sides and compression chambers (40, 40') disposed at a circumferential surface of the working cylinder (2), wherein, as a result of a displacement of the working cylinder (2) out of the central position, a compressed air path into the opposite-lying damping chamber can be opened (40, 40') and at least one annular surface (43, 43') can be acted upon with compressed air at the working cylinder (2) opposite to the displacement and, with a further displacement of the working cylinder (2), an essentially closed hollow space or compression chamber (42) with a volume reducible in size by a further displacement in the same direction can be constituted.
- The pneumatic hammer (D) according to claim 3, characterised in that a flow channel (5) with a small cross-section in the region of the guidance of the handle body part (1) and/or in the cylinder body (2) is formed from the compression chamber (42, 42') to the surrounding air.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200632083A SI1726408T1 (en) | 2005-05-25 | 2006-05-17 | Hand-held vibration damping pneumatic hammer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT9072005A AT501861B1 (en) | 2005-05-25 | 2005-05-25 | HAND-HELD, VIBRATION-STEAMED AIR HAMMER |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1726408A1 EP1726408A1 (en) | 2006-11-29 |
EP1726408B1 true EP1726408B1 (en) | 2016-05-04 |
Family
ID=36950339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06450075.4A Not-in-force EP1726408B1 (en) | 2005-05-25 | 2006-05-17 | Hand-held vibration damping pneumatic hammer |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1726408B1 (en) |
AT (1) | AT501861B1 (en) |
ES (1) | ES2585229T3 (en) |
PL (1) | PL1726408T3 (en) |
PT (1) | PT1726408T (en) |
SI (1) | SI1726408T1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2458459A (en) * | 2008-03-17 | 2009-09-23 | Trevor Timmins | Vibration damping handle |
AT507210B1 (en) | 2008-11-20 | 2010-03-15 | Bbg Baugeraete Gmbh | HAND-HELD COMPRESSED AIR HAMMER WITH SWITCHABLE VIBRATION DAMPING |
CN114147510B (en) * | 2021-11-30 | 2022-12-16 | 盐城奥凯明通阀门有限公司 | Production tool for gate valve |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1792893A (en) | 1928-04-03 | 1931-02-17 | Chicago Pneumatic Tool Co | Portable percussive tool |
US1804712A (en) * | 1930-08-04 | 1931-05-12 | Herman A Stevens | Pneumatic hammer |
US1973432A (en) * | 1932-05-21 | 1934-09-11 | Ehrenreich & Cie A | Cushioning of the handle of compressed air hammers |
US3200893A (en) * | 1962-04-09 | 1965-08-17 | Leavell Charles | Vibration elimination |
DE1503193B1 (en) * | 1964-08-13 | 1970-02-19 | Erich Hahn | Pneumatic impact tool |
US3727700A (en) * | 1971-04-19 | 1973-04-17 | Chicago Pneumatic Tool Co | Pneumatically percussive tool having a vibration free handle |
FR2456593A1 (en) * | 1979-05-15 | 1980-12-12 | Montabert Roger | VIBRATION DAMPER FOR PNEUMATIC PERCUSSION APPARATUS |
SE421182B (en) * | 1980-04-25 | 1981-12-07 | Atlas Copco Ab | VIBRATION DUMP DEVICE TOOL |
GB8907410D0 (en) | 1989-04-01 | 1989-05-17 | Macdonald Pneumatics | Paving breakers and supports therefor |
WO1993009919A1 (en) * | 1991-11-11 | 1993-05-27 | Nauchno-Tekhnichesky Kooperativ 'tekhprogress' | Pneumatic instrument |
WO1993020981A1 (en) | 1992-04-10 | 1993-10-28 | Nauchno-Tekhnichesky Kooperativ 'tekhprogress' | Pneumatic instrument |
LV11123B (en) * | 1994-07-22 | 1996-08-20 | Partner Zinatniska Razosanas A | Pneumatic hammer |
FR2723332B1 (en) * | 1994-08-04 | 1996-10-18 | Favre Jacques Francois Flavien | PNEUMATIC HAMMER WITH DAMPED VIBRATIONS |
US7527107B2 (en) * | 2003-07-15 | 2009-05-05 | Wacker Construction Equipment Ag | Working tool with damped handle |
-
2005
- 2005-05-25 AT AT9072005A patent/AT501861B1/en not_active IP Right Cessation
-
2006
- 2006-05-17 PT PT64500754T patent/PT1726408T/en unknown
- 2006-05-17 EP EP06450075.4A patent/EP1726408B1/en not_active Not-in-force
- 2006-05-17 SI SI200632083A patent/SI1726408T1/en unknown
- 2006-05-17 ES ES06450075.4T patent/ES2585229T3/en active Active
- 2006-05-17 PL PL06450075.4T patent/PL1726408T3/en unknown
Also Published As
Publication number | Publication date |
---|---|
SI1726408T1 (en) | 2016-09-30 |
PL1726408T3 (en) | 2016-12-30 |
AT501861B1 (en) | 2009-08-15 |
ES2585229T3 (en) | 2016-10-04 |
EP1726408A1 (en) | 2006-11-29 |
AT501861A1 (en) | 2006-12-15 |
PT1726408T (en) | 2016-08-12 |
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