EP0949988A1 - 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

Info

Publication number
EP0949988A1
EP0949988A1 EP97953905A EP97953905A EP0949988A1 EP 0949988 A1 EP0949988 A1 EP 0949988A1 EP 97953905 A EP97953905 A EP 97953905A EP 97953905 A EP97953905 A EP 97953905A EP 0949988 A1 EP0949988 A1 EP 0949988A1
Authority
EP
European Patent Office
Prior art keywords
hammer
handle
guide rod
housing
sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97953905A
Other languages
German (de)
French (fr)
Other versions
EP0949988B1 (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
Original Assignee
Wacker Werke GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wacker Werke GmbH and Co KG filed Critical Wacker Werke GmbH and Co KG
Publication of EP0949988A1 publication Critical patent/EP0949988A1/en
Application granted granted Critical
Publication of EP0949988B1 publication Critical patent/EP0949988B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 with a suspension against the Ha mergephaseuse handle.
  • the previously known cushions for reducing the vibrations transmitted to the hand and arm are designed so 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 lateral suspension are designed approximately the same and quite hard, so that the damping of the Vibrations leaves something to be desired.
  • a fixed suspension with an unchangeable spring characteristic and a relatively short spring travel have also proven to be disadvantageous because this means that no adaptation to different working conditions, such as in particular the type of material to be processed, is possible.
  • the object of the invention is to design a breaker and / or hammer drill with a spring-loaded handle against the hammer housing in such a way that it offers the most effective protection of hand and arm against the tool vibrations with a simple and inexpensive construction, and on the one hand in all directions and preferably in Axial direction of the hammer provides effective damping, but at the same time also enables the tool to be guided securely, with a certain angular offset despite the linear guidance between the device and the handle should be possible.
  • At least one straight guide extending parallel to the longitudinal axis of the hammer, which is displaceable to a limited extent along the handle relative to the hammer housing and against which it is cushioned to a limited extent on all sides, wherein according to a preferred embodiment the U-shaped handle with the Hammer housing facing, mutually parallel legs, with each straight leg is surrounded by a straight guide.
  • each straight guide consists of a guide rod which extends essentially parallel to the longitudinal axis of the hammer housing and projects from it towards the handle, and a guide sleeve which is formed in the handle.
  • the guide sleeve each consists of a fixed bushing in the handle and of a lining inserted into the bushing, axially held therein and made of rubber-elastic material, which is provided with a bore which extends at least over the length of the guide rod and has a matching cross section.
  • the lining is also held in the axial direction on the guide rod.
  • the guide rod can be axially cushioned in the bore, which is achieved according to a preferred embodiment by a on the free end face of the guide rod and compression spring supporting the bottom of the sleeve.
  • a radial projection on the guide rod which engages in a radial recess in the lining, which has an axial length corresponding to the maximum permissible displacement distance between the hammer housing and the handle has, wherein the radial projection can be designed as an annular shoulder.
  • Fig. 1 is a partially sectioned, schematic side view of a break and / or hammer drill and
  • Fig. 2 shows a schematic detail section through a variant of the cushioning.
  • a breaker and / or hammer drill designated overall by 10, consists essentially of two parts, namely the device carrying the tool and its drive, shown only schematically by its housing 12, and a U-shaped handle 14 for handling and guiding it two legs 16 and 18 running essentially parallel to one another and also approximately parallel to the direction of vibration of the tool carried by the housing 12.
  • the housing 12 is provided with two guide rods 20 and 22 projecting from the housing 12 approximately in this direction of oscillation against the handle 14, each of which penetrates into one of the legs 16 and 18 and engages there in a guide sleeve 24 and 26, respectively.
  • Each guide sleeve 24 and 26 has a sleeve 28 fixedly attached to the handle with a bottom 30 at its end facing away from the housing 12.
  • the sleeve 28 there is at least one lining 32 made of rubber-elastic material, which is provided with a central bore 34, the cross section of which is adapted to the cross section of the guide rods 20 and 22.
  • the liner 32 is held in the sleeve 28 in the axial direction.
  • the length of the bore 34 is dimensioned such that it can accommodate the entire length of the guide rod 20 or 22 which is immersed in the guide sleeve 24 or 26.
  • a cross-sectional widening 36 which forms an annular collar and engages in the cross section of the lining 32 and which can transmit axial forces to the lining 32 in both axial directions with an annular shoulder 38 or 40.
  • the distance between the lining 32 and the bottom 30 can be bridged by an annular spacer 42.
  • the handle 14 In the rest position shown in FIG. 1, the handle 14 is at a distance from the end of the housing 12 facing it in the direction of vibration of the tool or in the guide direction of the guide rods 20 and 22, and there is an approximately equal distance between the end engaging in the handle 14 each guide rod 20 or 22 and the bottom 30 of the sleeve 28, so that a swinging movement of the handle 14 relative to the housing 12 from this rest position in both guide directions, ie back and forth, is possible.
  • the liner 32 enables the guide rods 20 and 22 to tilt relative to the axis of the bushes 28, the extent of which is dependent on the elasticity of the liner 32 and its radial expansion.
  • a distance between the annular shoulders 38 and 40 and the opposite end faces 44 and 46 of two lining parts 32a and 32b is kept free on both sides of the cross-sectional widening 36, the guide rods 20 and 22 engaging in bores in 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 is inserted as an axially acting spring element in the bore 34 of the lining part 32b.

Landscapes

  • 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)

Abstract

The invention relates to a percussion drill and/or jack hammer comprising a handle (14) that is spring-buffered against the hammer housing (12) and characterized in that it has at least one straight guiding track (20, 22) running parallel to the longitudinal axis of the hammer. The handle (14) can be moved to a limited extent along said guiding track in relation to the hammer housing (12) and is spring-buffered in such a way that its movement against the guiding track is limited on all sides.

Description

AUFBRUCH- UND/ODER BOHRHAMMER MIT GEGEN DAS HAMMERGEHÄUSE ABGEFEDERTEM HAND¬ GRIFFBreakers and / OR HAMMER DRILL WITH AGAINST THE HAMMER HOUSING spring- HAND ¬ HANDLE
Die Erfindung betrifft einen Aufbruch- und/oder Bohrhammer mit gegen das Ha mergehäuse abgefedertem Handgriff.The invention relates to a breaker and / or hammer drill with a suspension against the Ha mergehäuse handle.
Die bisher bekannten Abfederungen zur Reduzierung der auf Hand und Arm übertragenen Schwingungen sind so beschaffen, daß ein Winkelversatz zwischen Gerät und Handgriffverhindert 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 cushions for reducing the vibrations transmitted to the hand and arm are designed so 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 lateral suspension are designed approximately the same and quite hard, so that the damping of the Vibrations leaves something to be desired.
Als nachteilig hat sich außerdem eine fest dimensionierte Federung mit unveränderlicher Federkennlinie und ein relativ kurzer Federweg erwiesen, weil dadurch keine Anpassung an unterschiedliche Arbeitsbedingungen, wie insbesondere die Art des zu bearbeitenden Materials, möglich ist.A fixed suspension with an unchangeable spring characteristic and a relatively short spring travel have also proven to be disadvantageous because this means that no adaptation to different working conditions, such as in particular the type of material to be processed, is possible.
Aufgabe der Erfindungist es, einen Aufbruch- und/oder Bohrhammer 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 to design a breaker and / or hammer drill with a spring-loaded handle against the hammer housing in such a way that it offers the most effective protection of hand and arm against the tool vibrations with a simple and inexpensive construction, and on the one hand in all directions and preferably in Axial direction of the hammer provides effective damping, but at the same time also enables the tool to be guided securely, with a certain angular offset despite the linear guidance 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.In order to improve the maneuverability of the device, it should also be possible to make a clear difference between the lateral cushioning and the longitudinal cushioning of the tool. In addition, there should be the possibility of adapting the device to any working conditions by selecting the spring characteristic, which should also allow a longer spring travel than before.
Die Lösung dieser Aufgabe wird erreicht durch mindestens eine sich parallel zur Längsachse des Hammers erstreckende Geradführung, der entlang der Handgriff gegenüber dem Hammergehäuse begrenzt verschiebbar ist und gegen die er allseits begrenzt beweglich abgefedert ist, wobei nach einer bevorzugten Ausführungsform der Handgriff U-Form mit dem Hammergehäuse zugewendeten, zueinander im wesentlichen parallelen Schenkeln hat, wobei sich in jedem Schenkel eine von diesem umschlossene Geradführung befindet.The solution to this problem is achieved by at least one straight guide extending parallel to the longitudinal axis of the hammer, which is displaceable to a limited extent along the handle relative to the hammer housing and against which it is cushioned to a limited extent on all sides, wherein according to a preferred embodiment the U-shaped handle with the Hammer housing facing, mutually parallel legs, with each straight leg is surrounded by a straight guide.
Dadurch wird einerseits ein gute Führung des Geräts ermöglicht, während die nach allen Seiten und bevorzugt in Achs- richtung wirksame Federung auch einen Winkelversatz zwischen Gerät und Handgriff ermöglicht.This enables good guidance of the device, on the one hand, while the suspension, which is effective on all sides and preferably in the axial direction, also enables an angular offset between the device and the handle.
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.A further advantageous embodiment consists in the fact that each straight guide consists of a guide rod which extends essentially parallel to the longitudinal axis of the hammer housing and projects from it towards the handle, and a guide sleeve which is formed in the handle.
Dies bietet den weiteren Vorteil, daß eine gute Abdichtung gegen eindringenden Schmutz und damit eine hohe Schmutzun- empfindlichkeit 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 achieved.
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 consists of a fixed bushing in the handle and of a lining inserted into the bushing, axially held therein and made of rubber-elastic material, which is provided with a bore which extends at least over the length of the guide rod and has a matching cross section. According to a first variant, the lining is also held in the axial direction on the guide rod.
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 suitable dimensioning of the rubber-elastic lining, a different suspension in the guide direction and transversely to it can be achieved, for which purpose, according to a further advantageous feature, the guide rod can be axially cushioned in the bore, which is achieved according to a preferred embodiment by a on the free end face of the guide rod and compression spring supporting the bottom of the sleeve.
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 the guide direction and transversely to this is achieved by interchangeably insertable liner parts which have different compressibility, and the compression spring can also be replaced by such a liner part.
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 of the axial movement between the device and the handle in the guide direction is a further configuration by a radial projection on the guide rod, which engages in a radial recess in the lining, which has an axial length corresponding to the maximum permissible displacement distance between the hammer housing and the handle has, wherein the radial projection can be designed as an annular shoulder.
Anhand der nun folgenden Beschreibung der in der Zeichnung dargestellten Ausführungsbeispiele der Erfindung wird diese näher erläutert .Based on the following description of the embodiments of the invention shown in the drawing, this is explained in more detail.
Es zeigt:It shows:
Fig. 1 eine teilweise geschnittene, schematische Seitenansicht eines Aufbruch- und/oder Bohrhammers undFig. 1 is a partially sectioned, schematic side view of a break and / or hammer drill and
Fig. 2 einen schematischen Detailschnitt durch eine Variante der Abfederung.Fig. 2 shows a schematic detail 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 overall by 10, consists essentially of two parts, namely the device carrying the tool and its drive, shown only schematically by its housing 12, and a U-shaped handle 14 for handling and guiding it two legs 16 and 18 running essentially parallel to one another and also approximately parallel to the direction of vibration of the tool carried by the housing 12.
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 provided with two guide rods 20 and 22 projecting from the housing 12 approximately in this direction of oscillation against the handle 14, each of which penetrates into one of the legs 16 and 18 and engages there in a guide sleeve 24 and 26, respectively.
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 axilaer Richtung feste Verbindung, die bei der Ausführungsform nach Fig. l 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 a sleeve 28 fixedly attached to the handle with a bottom 30 at its end facing away from the housing 12. In the sleeve 28 there is at least one lining 32 made of rubber-elastic material, which is provided with a central bore 34, the cross section of which is adapted to the cross section of the guide rods 20 and 22. The liner 32 is held in the sleeve 28 in the axial direction. The length of the bore 34 is dimensioned such that it can accommodate the entire length of the guide rod 20 or 22 which is immersed in the guide sleeve 24 or 26. Also between the guide rod 20 or 22 and the lining 32 there is a fixed axillary direction Connection created in the embodiment according to FIG. 1 by a cross-sectional widening 36 which forms an annular collar and engages in the cross section of the lining 32 and which can transmit axial forces to the lining 32 in both axial directions with an annular shoulder 38 or 40. The distance between the lining 32 and the bottom 30 can be bridged by an annular spacer 42.
In der in Fig. 1 gezeigten Ruhestellung hat der Handgriff 14 in Schwingungsriehtung 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, der Ausmaß von der Elastitität der Auskleidung 32 und deren radialer Ausdehnung abhängig is .In the rest position shown in FIG. 1, the handle 14 is at a distance from the end of the housing 12 facing it in the direction of vibration of the tool or in the guide direction of the guide rods 20 and 22, and there is an approximately equal distance between the end engaging in the handle 14 each guide rod 20 or 22 and the bottom 30 of the sleeve 28, so that a swinging movement of the handle 14 relative to the housing 12 from this rest position in both guide directions, ie back and forth, is possible. At the same time, the liner 32 enables the guide rods 20 and 22 to tilt relative to the axis of the bushes 28, the extent of which is dependent on the elasticity of the liner 32 and its radial expansion.
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 Fuhrungsstangen und dem Boden 30 der Büchse 28 eine Druckfeder 50 als axial wirkendes Federelement in der Bohrung 34 des Auskleidungsteils 32b eingelegt ist . In the embodiment according to FIG. 2, a distance between the annular shoulders 38 and 40 and the opposite end faces 44 and 46 of two lining parts 32a and 32b is kept free on both sides of the cross-sectional widening 36, the guide rods 20 and 22 engaging in bores in 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 is inserted as an axially acting spring element in the bore 34 of the lining part 32b.

Claims

Patentansprüche claims
1. Aufbruch- und/oder Bohrhammer mit gegen das Hammergehäuse (12) abgefedertem Handgriff (14) , gekennzeichnet durch mindestens eine sich parallel zur Längsachse des1. Breaking and / or hammer drill with against the hammer housing (12) cushioned handle (14), characterized by at least one parallel to the longitudinal axis of the
Hammers erstreckende Geradführung (20,22), der entlang der Handgriff (14) gegenüber dem Hammergehäuse (12) begrenzt verschiebbar ist und gegen die er allseits begrenzt beweglich abgefedert ist.Hammer extending straight guide (20, 22), which can be displaced along the handle (14) relative to the hammer housing (12) to a limited extent and against which it is cushioned to a limited extent on all sides.
2. Hammer nach Anspruch 1, dadurch gekennzeichnet, daß der Handgriff (14) U-Form mit dem Hammergehäuse (12) zugewendeten, zueinander im wesentlichen parallelen Schenkeln (16, 18) hat, und daß sich in jedem Schenkel (16, 18) eine von diesem umschlossene Geradführung (20, 22) befindet.2. Hammer according to claim 1, characterized in that the handle (14) U-shape with the hammer housing (12) facing, mutually parallel legs (16, 18), and that in each leg (16, 18) a straight guide (20, 22) enclosed by the latter is located.
3. Hammer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß jede Geradführung aus einer sich im wesentlichen parallel zur Längsachse des Hammergehäuses ersteckenden, von diesem zum Handgriff (14) hin vorragenden Führungs- Stange (20, 22) und einer in dem Handgriff (14) ausgebildeten Führungshülse (24, 26) besteht.3. Hammer according to claim 1 or 2, characterized in that each straight guide consists of a substantially parallel to the longitudinal axis of the hammer housing, from this to the handle (14) projecting guide rod (20, 22) and one in the handle ( 14) trained guide sleeve (24, 26).
4. Hammer nach Anspruch 3, dadurch gekennzeichnet, daß die Führungshülse (24, 26) jeweils aus einer festen Büchse (28) im Handgriff (14) und aus einer in die Büchse (28) eingefügten, axial darin festgehaltenen und aus gummielastischem Material gebildeten Auskleidung (32) besteht, die mit einer sich mindestens über die Länge der FührungsStange (20, 22) erstreckenden Bohrung (34) von zu dieser passendem Querschnitt versehen ist.4. Hammer according to claim 3, characterized in that the guide sleeve (24, 26) each from a fixed sleeve (28) in the handle (14) and from a in the sleeve (28) inserted, axially held therein and formed from rubber-elastic material Lining (32) is provided, which is provided with a bore (34) which extends at least over the length of the guide rod (20, 22) and has a matching cross section.
5. Hammer nach Anspruch 4, dadurch gekennzeichnet. daß die Auskleidung (32) auch an der FührungsStange (20, 22) in axialer Richtung festgehalten ist.5. Hammer according to claim 4, characterized. that the lining (32) is also held on the guide rod (20, 22) in the axial direction.
6. Hammer nach Anspruch 4, dadurch gekennzeichnet, daß die FührungsStange (20, 22) in der Bohrung (34) axial abgefedert (50) ist.6. Hammer according to claim 4, characterized in that the guide rod (20, 22) in the bore (34) is axially cushioned (50).
7. Hammer nach Anspruch 6, gekennzeichnet durch eine sich an der freien Stirnseiteder FührungsStange (20, 22) und an dem Boden (30) der Büchse (28) abstützende Druckfeder (50) .7. Hammer according to claim 6, characterized by a compression spring (50) which is supported on the free end face of the guide rod (20, 22) and on the bottom (30) of the bush (28).
8. Hammer nach einem der Ansprüche 4 bis 6, geken - zeichnet durch auswechselbar in die Büchse (28) einsetzbare8. Hammer according to one of claims 4 to 6, geken - characterized by replaceable in the sleeve (28) insertable
Auskleidungsteile (32; 32a, 32b), welche eine unterschiedliche Zusammendrückbarkeit aufweisen.Lining parts (32; 32a, 32b), which have different compressibility.
9. Hammer nach Anspruch 8 , gekennzeichnet durch wenigstens ein sich an der freien Stirnseite der Führungsstange (20, 22) und an dem Boden (30) der Büchse (28) abstützendes, zusammendrückbares Auskleidungsteil.9. Hammer according to claim 8, characterized by at least one on the free end face of the guide rod (20, 22) and on the bottom (30) of the sleeve (28) supporting, compressible lining part.
10. Hammer nach Anspruch 4 oder Anspruch 4 mit einem der Ansprüche 6 bis 9, gekennzeichnet durch einen radialen Vorsprung (36) an der FührungsStange (20, 22) , der in eine in der Auskleidung (32) vorhandene radiale Ausnehmung eingreift, die eine der maximal zulässigen Verschiebestrecke zwischen Hammergehäuse (12) und Handgriff (14) entsprechende axiale Länge aufweist.10. Hammer according to claim 4 or claim 4 with one of claims 6 to 9, characterized by a radial projection (36) on the guide rod (20, 22) which engages in a radial recess in the lining (32), the one of the maximum permissible displacement distance between hammer housing (12) and handle (14) has a corresponding axial length.
11. Hammer nach Anspruch 10, dadurch gekennzeichnet, daß der radiale Vorsprung (36) als Ringschulter ausgebildet ist. 11. Hammer according to claim 10, characterized in that the radial projection (36) is designed 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 1997-01-02
DE29700003U DE29700003U1 (en) 1997-01-02 1997-01-02 Breaking and / or hammer drill
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 true EP0949988A1 (en) 1999-10-20
EP0949988B1 EP0949988B1 (en) 2001-11-07

Family

ID=8034157

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)

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US9993915B2 (en) 2014-01-23 2018-06-12 Black & Decker Inc. Rear handle
US10040184B2 (en) 2014-01-23 2018-08-07 Black & Decker Inc. Rear handle
US10046451B2 (en) 2014-01-23 2018-08-14 Black & Decker Inc. Rear handle
US10137562B2 (en) 2014-01-23 2018-11-27 Black & Decker Inc. Rear handle

Also Published As

Publication number Publication date
JP2001508364A (en) 2001-06-26
DE59705308D1 (en) 2001-12-13
US6148930A (en) 2000-11-21
EP0949988B1 (en) 2001-11-07
JP4101301B2 (en) 2008-06-18
WO1998029220A1 (en) 1998-07-09
ES2166107T3 (en) 2002-04-01
DE29700003U1 (en) 1997-02-27

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