EP0949988B1 - Percussion drill and/or jack hammer with handle spring-buffered against the hammer housing - Google Patents

Percussion drill and/or jack hammer with handle spring-buffered against the hammer housing Download PDF

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Publication number
EP0949988B1
EP0949988B1 EP97953905A EP97953905A EP0949988B1 EP 0949988 B1 EP0949988 B1 EP 0949988B1 EP 97953905 A EP97953905 A EP 97953905A EP 97953905 A EP97953905 A EP 97953905A EP 0949988 B1 EP0949988 B1 EP 0949988B1
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EP
European Patent Office
Prior art keywords
hammer
handle
guide rod
hammer according
guide
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.)
Expired - Lifetime
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EP97953905A
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German (de)
French (fr)
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EP0949988A1 (en
Inventor
Rudolf Berger
Thomas Maurer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wacker Werke GmbH and Co KG
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Wacker Werke GmbH and Co KG
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Publication of EP0949988A1 publication Critical patent/EP0949988A1/en
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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
    • 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

Definitions

  • the invention relates to a breaker and / or hammer drill according to the preamble of claim 1 with a cushioned handle against the hammer housing.
  • Such a hammer is known from GB-A-565783.
  • a fixed dimension also has the disadvantage Suspension with unchangeable spring characteristic and relative short travel proved because it does not adapt to different working conditions, such as in particular Type of material to be processed is possible.
  • a hammer with one against Hammer housing with flexible suspension on all sides Handle known that runs along two straight guides is slidable relative to the hammer housing.
  • Each of the straight guides has a guide rod and a guide sleeve, between which a rubber element is arranged for cushioning, when the hammer is actuated is claimed for shear. Because of the shear forces there is a risk that the connection between Handle and hammer housing loosen. Because of the the low guiding effect of the straight guides can Hammer also difficult to handle.
  • vibration-damped handles can be found in US-A-4,401,167 and EP-A-0 066 779.
  • the object of the invention is a breakup and / or hammer drill of the type mentioned at the beginning with cushioned against the hammer housing Handle so that it is simple and cost-effective construction as effective as possible Protection of hand and arm from tool vibrations offers and on the one hand one in all directions and preferably effective in the axial direction of the hammer Damping, but also a safe management of the Tool allows, despite linear guidance A certain angular offset between the device and the handle should be possible.
  • the handle has a U-shape with the Hammer housing facing, essentially parallel to each other Thighs, with one in each thigh of this enclosed straight line.
  • this enables good guidance of the device, while on all sides and preferably in the axial direction effective suspension also an angular offset between Device and handle enables.
  • each straight line is essentially parallel extending to the longitudinal axis of the hammer housing, from this protruding guide rod towards the handle and one in the handle formed guide sleeve.
  • a preferred embodiment is that the guide sleeve each from a fixed sleeve in the handle and from one inserted into the sleeve, axially held therein and consists of lining made of rubber-elastic material, the one with at least the length of the Guide rod extending bore from this matching Cross section is provided.
  • the Lining also on the guide rod in the axial direction captured.
  • the rubber-elastic lining can have a different suspension in the guide direction and reach across to what for another advantageous feature the guide rod in the bore can be axially cushioned, which is a preferred Embodiment is achieved by focusing on the free Face of the guide rod and on the bottom of the bush supporting compression spring.
  • a radial Projection on the guide rod which in one in the Liner engages existing radial recess that one of the maximum permissible displacement distance between hammer housing and handle has corresponding axial length, the radial projection being designed as an annular shoulder can be.
  • a breaker and / or hammer drill designated 10 in total consists essentially of two parts, namely the the tool and its drive, only schematic represented by its housing 12 and one to the device Handling and guiding U-shaped handle 14 with two essentially parallel to each other and also approximately parallel to the direction of vibration of the housing 12 tool legs 16 and 18 carried.
  • the housing 12 is with two from the housing 12 approximately in this Vibration direction projecting against the handle 14
  • Each guide sleeve 24 and 26 has one firmly in the handle attached sleeve 28 with a bottom 30 on her from the housing 12 opposite end.
  • the sleeve 28 is at least one lining 32 made of rubber-elastic material, which is provided with a central bore 34, the Cross section the cross section of the guide rods 20 and 22 is adjusted.
  • the liner 32 is in the axial direction in the sleeve 28 held.
  • the length of the bore 34 is so dimensioned that they the entire, in the guide sleeve 24 or Take up 26 immersed length of the guide rod 20 or 22 can. Also between the guide rod 20 and 22 and the liner 32 is fixed in the axial direction Connection in the embodiment of FIG.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Vibration Prevention Devices (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Description

Die Erfindung betrifft einen Aufbruch- und/oder Bohrhammer nach dem Oberbegriff des Anspruchs 1 mit gegen das Hammergehäuse abgefedertem Handgriff.The invention relates to a breaker and / or hammer drill according to the preamble of claim 1 with a cushioned handle against the hammer housing.

Ein derartiger Hammer ist aus der GB-A-565783 bekannt.Such a hammer is known from GB-A-565783.

Die bisher bekannten Abfederungen zur Reduzierung der auf Hand und Arm übertragenen Schwingungen sind so beschaffen, daß ein Winkelversatz zwischen Gerät und Handgriff verhindert wird bzw. die Längsfederung in Wirkungsrichtung des Werkzeugs und die seitliche Federung ungefähr gleich und ziemlich hart ausgelegt sind, so daß die Dämpfung der Schwingungen zu wünschen übrig läßt.The previously known cushioning to reduce the Hand and arm transmitted vibrations are such that an angular offset between the device and the handle is prevented or the longitudinal suspension in the direction of action of the tool and the side suspension approximately are designed the same and quite hard, so that the damping which leaves much to be desired.

Als nachteilig hat sich außerdem eine fest dimensionierte Federung mit unveränderlicher Federkennlinie und relativ kurzem Federweg erwiesen, weil dadurch keine Anpassung an unterschiedliche Arbeitsbedingungen, wie insbesondere die Art des zu bearbeitenden Materials, möglich ist.A fixed dimension also has the disadvantage Suspension with unchangeable spring characteristic and relative short travel proved because it does not adapt to different working conditions, such as in particular Type of material to be processed is possible.

Aus der GB-A-565,783 ist ein Hammer mit einem gegen ein Hammergehäuse allseits begrenzt beweglich abgefederten Handgriff bekannt, der entlang von zwei Geradführungen gegenüber dem Hammergehäuse begrenzt verschiebbar ist. Jede der Geradführungen weist eine Führungsstange und eine Führungshülse auf, zwischen denen ein Gummielement zur Abfederung angeordnet ist, das bei Betätigen des Hammers auf Scherung beansprucht wird. Aufgrund der Scherkräfte besteht die Gefahr, daß sich die Verbindung zwischen Handgriff und Hammergehäuse löst. Wegen der geringen Führungswirkung der Geradführungen läßt sich der Hammer zudem schwierig handhaben.From GB-A-565,783 is a hammer with one against Hammer housing with flexible suspension on all sides Handle known that runs along two straight guides is slidable relative to the hammer housing. Each of the straight guides has a guide rod and a guide sleeve, between which a rubber element is arranged for cushioning, when the hammer is actuated is claimed for shear. Because of the shear forces there is a risk that the connection between Handle and hammer housing loosen. Because of the the low guiding effect of the straight guides can Hammer also difficult to handle.

Eine andere schwingungsisolierende Handgriff-Verbindungskonstruktion ist aus der DE-A-39 13 971 bekannt, die jedoch für Hand-Trennschleifmaschinen entwickelt worden ist und sich nicht für den Einsatz in Hämmern eignet, bei denen primär hohe Kräfte in Längsrichtung des Hammers wirken.Another vibration isolating handle connection construction is known from DE-A-39 13 971 which however, has been developed for hand-held cut-off machines is and is not suitable for use in hammers which are primarily high forces in the longitudinal direction of the hammer Act.

Weitere Beispiele für schwingungsgedämpfte Handgriffe finden sich in US-A-4,401,167 und EP-A-0 066 779.Further examples of vibration-damped handles can be found in US-A-4,401,167 and EP-A-0 066 779.

Aufgabe der Erfindung ist es, einen Aufbruch- und/ oder Bohrhammer der eingangs genannten Bauart mit gegen das Hammergehäuse abgefedertem Handgriff so auszugestalten, daß er bei einfacher und kostengünstiger Konstruktion einen möglichst wirksamen Schutz von Hand und Arm vor den Werkzeugschwingungen bietet und dabei einerseits eine nach allen Richtungen und bevorzugt in Achsrichtung des Hammers wirksame Dämpfung, zugleich aber auch eine sichere Führung des Werkzeugs ermöglicht, wobei trotz linearer Führung zwischen Gerät und Handgriff ein gewisser Winkelversatz möglich sein soll.The object of the invention is a breakup and / or hammer drill of the type mentioned at the beginning with cushioned against the hammer housing Handle so that it is simple and cost-effective construction as effective as possible Protection of hand and arm from tool vibrations offers and on the one hand one in all directions and preferably effective in the axial direction of the hammer Damping, but also a safe management of the Tool allows, despite linear guidance A certain angular offset between the device and the handle should be possible.

Um die Führbarkeit des Geräts zu verbessern, soll außerdem ein deutlicher Unterschied zwischen der seitlichen Abfederung und der Längsabfederung des Werkzeugs realisierbar sein. Außerdem soll die Möglichkeit bestehen, das Gerät durch beliebige Wahl der Federkennlinie an unterschiedliche Arbeitsbedingungen anzupassen, wozu auch ein längerer Federweg als bisher ermöglicht werden soll.To improve the manageability of the device is also said to a clear difference between the side cushioning and the longitudinal cushioning of the tool his. In addition, there should be the possibility of the device by any choice of the spring characteristic to different Adapting working conditions, including a longer travel than should be possible so far.

Die Lösung dieser Aufgabe wird durch die im Anspruch 1 angegebenen Merkmale erreicht. Nach einer bevorzugten Ausführungsform hat der Handgriff eine U-Form mit dem Hammergehäuse zugewendeten, zueinander im wesentlichen parallelen Schenkeln, wobei sich in jedem Schenkel eine von diesem umschlossene Geradführung befindet.This object is achieved by the features specified in claim 1. After a preferred embodiment, the handle has a U-shape with the Hammer housing facing, essentially parallel to each other Thighs, with one in each thigh of this enclosed straight line.

Dadurch wird einerseits ein gute Führung des Geräts ermöglicht, während die nach allen Seiten und bevorzugt in Achsrichtung wirksame Federung auch einen Winkelversatz zwischen Gerät und Handgriff ermöglicht.On the one hand, this enables good guidance of the device, while on all sides and preferably in the axial direction effective suspension also an angular offset between Device and handle enables.

Eine weitere vorteilhafte Ausgestaltung besteht darin, daß jede Geradführung aus einer sich im wesentlichen parallel zur Längsachse des Hammergehäuses ersteckenden, von diesem zum Handgriff hin vorragenden Führungsstange und einer in dem Handgriff ausgebildeten Führungshülse besteht.Another advantageous embodiment is that each straight line is essentially parallel extending to the longitudinal axis of the hammer housing, from this protruding guide rod towards the handle and one in the handle formed guide sleeve.

Dies bietet den weiteren Vorteil, daß eine gute Abdichtung gegen eindringenden Schmutz und damit eine hohe Schmutzunempfindlichkeit und somit ein Beitrag zu einer hohen Lebensdauer des Geräts erreicht wird.This offers the further advantage that a good seal against penetrating dirt and thus a high level of dirt resistance and thus a contribution to a long service life of the device is reached.

Eine bevorzugte Ausgestaltung ist es, daß die Führungshülse jeweils aus einer festen Büchse im Handgriff und aus einer in die Büchse eingefügten, axial darin festgehaltenen und aus gummielastischem Material gebildeten Auskleidung besteht, die mit einer sich mindestens über die Länge der Führungsstange erstreckenden Bohrung von zu dieser passendem Querschnitt versehen ist. Nach einer ersten Variante ist die Auskleidung auch an der Führungsstange in axialer Richtung festgehalten.A preferred embodiment is that the guide sleeve each from a fixed sleeve in the handle and from one inserted into the sleeve, axially held therein and consists of lining made of rubber-elastic material, the one with at least the length of the Guide rod extending bore from this matching Cross section is provided. According to a first variant, the Lining also on the guide rod in the axial direction captured.

Durch geeignete Dimensionierung der gummielastischen Auskleidung läßt sich eine unterschiedliche Federung in Führungsrichtung und quer dazu erreichen, wozu nach einem weiteren vorteilhaften Merkmal die Führungsstange in der Bohrung axial abgefedert sein kann, was nach einer bevorzugten Ausführungsform erreicht wird durch eine sich an der freien Stirnseite der Führungsstange und an dem Boden der Büchse abstützende Druckfeder.By appropriate dimensioning of the rubber-elastic lining can have a different suspension in the guide direction and reach across to what for another advantageous feature the guide rod in the bore can be axially cushioned, which is a preferred Embodiment is achieved by focusing on the free Face of the guide rod and on the bottom of the bush supporting compression spring.

Eine besonders einfache Anpassung der Dämpfungswirkung in Führungsrichtung und quer zu dieser wird erreicht durch auswechselbar in die Büchse einsetzbare Auskleidungsteile, welche eine unterschiedliche Zusammendrückbarkeit aufweisen, wobei auch die Druckfeder durch ein solches Auskleidungsteil ersetzt werden kann.A particularly simple adjustment of the damping effect in Leadership direction and across this is achieved by interchangeable lining parts that can be inserted into the sleeve, which have different compressibility, with the compression spring also through such a lining part can be replaced.

Besonders vorteilhaft für die Dimensionierung der in Führungsrichtung verlaufenden Axialbewegung zwischen Gerät und Handgriff ist eine weitere Ausgestaltung durch einen radialen Vorsprung an der Führungsstange, der in eine in der Auskleidung vorhandene radiale Ausnehmung eingreift, die eine der maximal zulässigen Verschiebestrecke zwischen Hammergehäuse und Handgriff entsprechende axiale Länge aufweist, wobei der radiale Vorsprung als Ringschulter ausgebildet sein kann.Particularly advantageous for the dimensioning in the direction of the guide axial movement between device and Handle is a further design by a radial Projection on the guide rod, which in one in the Liner engages existing radial recess that one of the maximum permissible displacement distance between hammer housing and handle has corresponding axial length, the radial projection being designed as an annular shoulder can be.

Anhand der nun folgenden Beschreibung der in der Zeichnung dargestellten Ausführungsbeispiele der Erfindung wird diese näher erläutert.Based on the following description of the in the drawing Embodiments of the invention shown will this explained in more detail.

Es zeigt:

Fig. 1
eine teilweise geschnittene, schematische Seitenansicht eines Aufbruch- und/oder Bohrhammers und
Fig. 2
einen schematischen Detailschnitt durch eine Variante der Abfederung.
It shows:
Fig. 1
a partially sectioned, schematic side view of a break and / or rotary hammer and
Fig. 2
a schematic detailed section through a variant of the cushioning.

Ein insgesamt mit 10 bezeichneter Aufbruch- und/oder Bohrhammer besteht im wesentlichen aus zwei Teilen, nämlich dem das Werkzeug und dessen Antrieb tragenden, nur schematisch durch sein Gehäuse 12 dargestellten Gerät und einem zu dessen Handhabung und Führung dienenden, U-förmigen Handgriff 14 mit zwei im wesentlichen paralell zueinander und auch etwa parallel zur Schwingungsrichtung des vom Gehäuse 12 getragenen Werkzeugs verlaufenden Schenkeln 16 und 18.A breaker and / or hammer drill designated 10 in total consists essentially of two parts, namely the the tool and its drive, only schematic represented by its housing 12 and one to the device Handling and guiding U-shaped handle 14 with two essentially parallel to each other and also approximately parallel to the direction of vibration of the housing 12 tool legs 16 and 18 carried.

Das Gehäuse 12 ist mit zwei aus dem Gehäuse 12 etwa in dieser Schwingungsrichtung gegen den Handgriff 14 vorspringenden Führungsstangen 20 und 22 versehen, deren jede in einen der Schenkel 16 bzw. 18 eindringt und dort jeweils in eine Führungshülse 24 bzw. 26 eingreift.The housing 12 is with two from the housing 12 approximately in this Vibration direction projecting against the handle 14 Provide guide rods 20 and 22, each in one the leg 16 or 18 penetrates and there in each case Guide sleeve 24 or 26 engages.

Jede Führungshülse 24 und 26 besitzt eine fest im Handgriff angebrachte Büchse 28 mit einem Boden 30 an ihrem vom Gehäuse 12 abgewandten Ende. In der Büchse 28 befindet sich wenigstens eine Auskleidung 32 aus gummielastischem Material, die mit einer zentralen Bohrung 34 versehen ist, deren Querschnitt dem Querschnitt der Führungsstangen 20 und 22 angepaßt ist. Die Auskleidung 32 wird in axialer Richtung in der Büchse 28 festgehalten. Die Länge der Bohrung 34 ist so bemessen, daß sie die gesamte, in die Führungshülse 24 bzw. 26 eintauchende Länge der Führungsstange 20 bzw. 22 aufnehmen kann. Auch zwischen der Führungsstange 20 bzw. 22 und der Auskleidung 32 besteht eine in axialer Richtung feste Verbindung, die bei der Ausführungsform nach Fig. 1 durch eine einen ringförmigen Bund bildende und in den Querschnitt der Auskleidung 32 eingreifende Querschnittserweiterung 36 geschaffen wird, die in beiden axialen Richtungen jeweils mit einer Ringschulter 38 bzw. 40 Axialkräfte auf die Auskleidung 32 übertragen kann. Die Distanz zwischen der Auskleidung 32 und dem Boden 30 kann von einem ringförmigen Distanzstück 42 überbrückt werden.Each guide sleeve 24 and 26 has one firmly in the handle attached sleeve 28 with a bottom 30 on her from the housing 12 opposite end. In the sleeve 28 is at least one lining 32 made of rubber-elastic material, which is provided with a central bore 34, the Cross section the cross section of the guide rods 20 and 22 is adjusted. The liner 32 is in the axial direction in the sleeve 28 held. The length of the bore 34 is so dimensioned that they the entire, in the guide sleeve 24 or Take up 26 immersed length of the guide rod 20 or 22 can. Also between the guide rod 20 and 22 and the liner 32 is fixed in the axial direction Connection in the embodiment of FIG. 1 by an annular collar and in cross section the cross-sectional widening 36 engaging the lining 32 is created, each in two axial directions with an annular shoulder 38 or 40 axial forces on the lining 32 can transmit. The distance between the linings 32 and the bottom 30 can be of an annular shape Spacer 42 are bridged.

In der in Fig. 1 gezeigten Ruhestellung hat der Handgriff 14 in Schwingungsrichtung des Werkzeugs bzw. in Führungsrichtung der Führungsstangen 20 und 22 einen Abstand von dem ihm zugewandten Ende des Gehäuses 12 und ein etwa gleich großer Abstand besteht zwischen dem in den Handgriff 14 eingreifenden Ende jeder Führungsstange 20 bzw. 22 und dem Boden 30 der Büchse 28, so daß eine Schwingbewegung des Handgriffs 14 relativ zum Gehäuse 12 aus dieser Ruheposition in beiden Führungsrichtungen, d.h. vor und zurück, möglich ist. Zugleich ermöglicht die Auskleidung 32 eine Kippbewegung der Führungsstangen 20 und 22 gegenüber der Achse der Büchsen 28, deren Ausmaß von der Elastizität der Auskleidung 32 und deren radialer Ausdehnung abhängig ist.In the rest position shown in FIG. 1, the handle 14 in the direction of vibration of the tool or in the direction of guidance the guide rods 20 and 22 a distance from him facing end of the housing 12 and an approximately the same size There is a distance between the one engaging in the handle 14 End of each guide rod 20 or 22 and the bottom 30 the sleeve 28 so that a swinging movement of the handle 14th relative to the housing 12 from this rest position in both Leadership directions, i.e. back and forth, is possible. At the same time allows the liner 32 to tilt the Guide rods 20 and 22 opposite the axis of the bushings 28, the extent of which depends on the elasticity of the lining 32 and whose radial expansion is dependent.

Bei der Ausführungsform nach Fig. 2 ist beiderseits der Querschnittserweiterung 36 ein Abstand zwischen den Ringschultern 38 und 40 und den ihnen gegenüberliegenden Stirnflächen 44 bzw. 46 zweier Auskleidungsteile 32a und 32b freigehalten, wobei die Führungsstangen 20 und 22 in Bohrungen beider Auskleidungsteile 32a und 32b eingreifen und zwischen dem freien Ende dieser Führungsstangen und dem Boden 30 der Büchse 28 eine Druckfeder 50 als axial wirkendes Federelement in der Bohrung 34 des Auskleidungsteils 32b eingelegt ist.2 is on both sides of the Cross-sectional expansion 36 a distance between the ring shoulders 38 and 40 and the end faces opposite them 44 and 46 of two lining parts 32a and 32b kept clear, with the guide rods 20 and 22 in bores engage both lining parts 32a and 32b and between the free end of these guide rods and the Bottom 30 of the sleeve 28 a compression spring 50 as an axially acting Spring element in the bore 34 of the lining part 32b is inserted.

Claims (13)

  1. Percussion and/or drill hammer having
    a handle (14) which is cushioned on all sides in a limitedly-moveable manner against a hammer housing (12);
    at least one straight-line mechanism (20, 22) extending parallel to the longitudinal axis of the hammer, along which straight-line mechanism the handle (14) can be displaced in a limited manner with respect to the hammer housing (12);
    wherein
    each straight-line mechanism (20, 22) comprises a respective inner guide element (20, 22) and an outer guide element (24, 26) surrounding the inner guide element at a spaced disposition;
    between the periphery of the inner guide element (20, 22) and the outer guide element (24, 26) at least one elastic element (32, 50) is inserted;
    characterised in that
    on the inner guide element (20, 22) at least one stop plane (40) is formed, perpendicular to the longitudinal axis of the hammer;
    the elastic element (32, 50) is disposed between the stop plane (40) and an end surface (30) of the outer guide element (24, 26);
    the elastic element (32, 50) comprises greater elasticity in the direction of the longitudinal axis of the hammer than in a direction transverse to the longitudinal axis.
  2. Hammer according to claim 1, characterised in that the inner guide element is a guide rod (20, 22) and the outer guide element is a guide sleeve (24, 26).
  3. Hammer according to claim 2, characterised in that a second elastic element (32a) is disposed between a second stop plane (38), provided on the rear side of the stop plane (40), and second end surface of the guide sleeve (24, 26), lying opposite the end surface (30) of the guide sleeve (24, 26).
  4. Hammer according to claim 2 or 3, characterised in that the handle (14) comprises a U-shape with limbs (16, 18) which are substantially parallel to each other and face the hammer housing (12), and that a straight-line mechanism (20, 22) is located in each limb (16, 18) and is enclosed thereby.
  5. Hammer according to any one of the preceding claims, characterised in that each guide rod (20, 22) extends, parallel to the longitudinal axis of the hammer housing, from this housing towards the handle (14), and that each guide sleeve (24, 26) is formed in the handle (14).
  6. Hammer according to claim 5, characterised in that each guide sleeve (24, 26) consists of a fixed bushing (28) in the handle (14) and that the elastic element is a liner (32) formed from rubber-elastic material fitted into the bushing (28) and firmly held therein in an axial manner, which liner is provided with a bore (34) extending at least over the length of the guide rod (20, 22) and having a cross-section to fit the guide rod (20, 22).
  7. Hammer according to claim 6, characterised in that the liner (32) is also firmly held on the guide rod (20, 22) in the axial direction.
  8. Hammer according to claim 6, characterised in that the guide rod (20, 22) is axially sprung (50) in the bore (34).
  9. Hammer according to claim 8, characterised by a compression spring (50) supported on the free end side of the guide rod (20) and on a base (30) of the bushing (28).
  10. Hammer according to any one of claims 6 to 8, characterised by a plurality of elastic elements in the form of liner parts (32; 32a, 32b) which can be inserted into the bushing (28) in an exchangeable manner and which have different degrees of compressibility.
  11. Hammer according to claim 10, characterised by at least one compressible liner part supported on the free end side of the guide rod (20, 22) and on a base (30) of the bushing (28).
  12. Hammer according to claim 6 or claim 6 together with one of claims 8 to 11,
    characterised by a radial projection (36), forming the stop plane (40), on the guide rod (20, 22), which projection engages in a radial recess provided in the liner (32) and with an axial length corresponding to the maximum permissible displacement path between the hammer housing (12) and the handle (14).
  13. Hammer according to claim 12, characterised in that the radial projection (36) is formed as an annular shoulder.
EP97953905A 1997-01-02 1997-12-22 Percussion drill and/or jack hammer with handle spring-buffered against the hammer housing Expired - Lifetime EP0949988B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29700003U DE29700003U1 (en) 1997-01-02 1997-01-02 Breaking and / or hammer drill
DE29700003U 1997-01-02
PCT/EP1997/007237 WO1998029220A1 (en) 1997-01-02 1997-12-22 Percussion drill and/or jack hammer with handle spring-buffered against the hammer housing

Publications (2)

Publication Number Publication Date
EP0949988A1 EP0949988A1 (en) 1999-10-20
EP0949988B1 true EP0949988B1 (en) 2001-11-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP97953905A Expired - Lifetime EP0949988B1 (en) 1997-01-02 1997-12-22 Percussion drill and/or jack hammer with handle spring-buffered against the hammer housing

Country Status (6)

Country Link
US (1) US6148930A (en)
EP (1) EP0949988B1 (en)
JP (1) JP4101301B2 (en)
DE (2) DE29700003U1 (en)
ES (1) ES2166107T3 (en)
WO (1) WO1998029220A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10357758A1 (en) * 2003-12-10 2005-07-21 Wacker Construction Equipment Ag Break-away and / or rotary hammer with linearly guided grip device
DE102004061521A1 (en) * 2004-12-21 2006-06-29 Hilti Ag Tool device with decoupled main handle

Families Citing this family (65)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000047862A1 (en) * 1999-02-10 2000-08-17 Anglo Operations Limited Rock drill handle
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WO1998029220A1 (en) 1998-07-09
US6148930A (en) 2000-11-21
DE59705308D1 (en) 2001-12-13
ES2166107T3 (en) 2002-04-01
EP0949988A1 (en) 1999-10-20
DE29700003U1 (en) 1997-02-27
JP4101301B2 (en) 2008-06-18
JP2001508364A (en) 2001-06-26

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