EP1000712A2 - Hammer drilling machine - Google Patents

Hammer drilling machine Download PDF

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Publication number
EP1000712A2
EP1000712A2 EP99121944A EP99121944A EP1000712A2 EP 1000712 A2 EP1000712 A2 EP 1000712A2 EP 99121944 A EP99121944 A EP 99121944A EP 99121944 A EP99121944 A EP 99121944A EP 1000712 A2 EP1000712 A2 EP 1000712A2
Authority
EP
European Patent Office
Prior art keywords
weight body
drilling tool
tool axis
rod
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.)
Granted
Application number
EP99121944A
Other languages
German (de)
French (fr)
Other versions
EP1000712A3 (en
EP1000712B9 (en
EP1000712B1 (en
Inventor
Peter Ziegler
Stephan Kuchinke
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
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 Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Publication of EP1000712A2 publication Critical patent/EP1000712A2/en
Publication of EP1000712A3 publication Critical patent/EP1000712A3/en
Application granted granted Critical
Publication of EP1000712B1 publication Critical patent/EP1000712B1/en
Publication of EP1000712B9 publication Critical patent/EP1000712B9/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
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/061—Swash-plate actuated impulse-driving mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0073—Arrangements for damping of the reaction force
    • B25D2217/0076—Arrangements for damping of the reaction force by use of counterweights
    • B25D2217/0088—Arrangements for damping of the reaction force by use of counterweights being mechanically-driven

Definitions

  • the invention relates to a hammer drill with a Air cushion percussion, in which an excitation sleeve, the forms a space receiving the air cushion and in the a percussion piston is reciprocable, concentric to Drilling tool axis is arranged, and with a die Excitation sleeve back and forth in the direction of the drilling tool axis moving wobble mechanism whose the Swashplate driving rotary element on one parallel to the drilling tool axis but at a distance next to this is provided rotatably drivable.
  • wobble drive device is a Understand rotation / translation converter device, at which is the rotational movement of a drive-side element into a linear translation movement of an output side Elements is implemented.
  • a rotating element acts here such as on what is referred to below as the swash plate Swash element that this tilts back and forth is driven while doing another element in linear Can translate movement.
  • a hammer drill of the type described above is from the DB 196 51 828 A1 (Bosch) known.
  • the present invention is the Task based on the mass accelerations or delayed vibrations in the known hammer drill and the associated Reduce handling difficulties.
  • This weight body forms a counterweight and generates counter moments to those resulting from the Exciting sleeve movement occurring moving masses and Moments. It was found with the invention that a significant increase in smoothness due to the linear moving weight body is achieved, in one such dimensions as is the result of a mass enrichment of the Swashplate not achieved on the corresponding side can be. This is because it is optimal Balance in this case cannot be achieved because the local mass accumulation on the swashplate none linear but one that swings with the swashplate would perform movement unlike that Conditions on the percussion side where the exciter sleeve is also provided linearly movable.
  • the weight body is forced advantageously by a housing fixed in operation Component of the hammer drill formed.
  • Component of the hammer drill formed is the forced operation formed at least one linearly extending rod, which is held on a housing-fixed component and in a Direction of movement linearly extended guide recess in engages the weight body.
  • This extended linearly Guide recess could, for example, have a through opening in the weight body.
  • the guide recess in the Weight body is designed as an open edge recess, since in such a case the forced operation on the outside of the Weight body can be realized. This creates Installation space inside the weight body that is used for training the coupling to the swash plate is available.
  • the Advantageously forming rod advantageously Round rod is the Advantageously forming rod advantageously Round rod.
  • the length of the rod could be compared to that Longitudinal extension of the weight body is shorter be and for example only in a central area of the Weight body to be arranged.
  • the Weight body formed essentially cuboid is.
  • it can be essentially divided into one cuboid, preferably below the striking mechanism arrange the designated area. It is precisely in this area creating additional space for the weight body unproblematic and not disturbing.
  • the coupling of the Weight body on the swashplate can in itself be realized in any way so that the commuting Swashplate movement in a linear reciprocating motion Movement of the weight body can be changed.
  • the Weight body an opening for receiving a radial Has extension of the swash plate.
  • the radial extension can be integrally formed with the swash plate or it can be an in itself act in any way attachable approach.
  • a dome-shaped Coupling attachment piece can be provided on the weight body.
  • the formation of an opening proves to be technically easier and above all space-saving.
  • the radial coupling extension on the Swashplate is advantageously spherical trained and thus includes a slimming Swashplate out. This facilitates the clutch to that Weight body.
  • FIG. 1 shows one designed according to the invention Hammer drill.
  • One extends from an electric motor 2 Drive shaft 4 in the figure vertically upwards.
  • About one Angular gear 6 is a drive deflection by 90 ° reached, which leads to a pinion 8.
  • the axis of rotation of pinion 8 is parallel to drilling tool axis 10 usable in the front area in a chuck body 12 tool not shown in the figure, however it is a drilling tool but also a clean one Percussion tool, such as a chisel.
  • the pinion 8 is in meshing engagement with a gear 14, which is rotatably arranged on an intermediate shaft 16 which in turn is parallel to the drilling tool axis 10 extends forward.
  • a gear 18 In a front section of the The intermediate shaft 16 is again a gear 18 intended.
  • a turning test In addition to the intermediate shaft 16 and concentric to Drilling tool axis 10 is a turning test with the tool connected outer sleeve 20 is provided, which by means of a displaceable back and forth in the direction of the tool axis 10 Coupling element 22 by meshing engagement with the Gear 18 in drive connection or except Drive connection can be brought.
  • an excitation sleeve 24 in Movable back and forth in the direction of the drilling tool axis 10 intended.
  • the excitation sleeve 24 defines a space 26, which delimits an air cushion and a percussion piston 28 again in the longitudinal direction of the drilling tool axis 10 slidably accommodates.
  • the air cushion in a known per se Relaxed or compressed and thereby a back and forth Movement of the percussion piston 28 caused.
  • the percussion piston 28 exercises with its front end face 30 an impact on an intermediate plunger 32 from the the drilling tool, not shown, is transmitted.
  • the wobble drive device 34 includes a Rotating element 36 which on the intermediate shaft 16 stored and rotatable relative to this.
  • the Rotating element 36 can be moved by moving one Coupling sleeve 38, which rotatably on the intermediate shaft 16th is provided, via a dog clutch 40 on its Coupling sleeve 38 facing side rotatably with the Intermediate shaft 16 are connected (impact operation).
  • the Rotation element 36 is from a swash plate element 42 surrounded, with rolling elements 44 provided between them are such that the rotating element 36 the inner shell and the swash plate 42 the outer shell of the thereby represents formed camp.
  • the swash plate 42 includes on their side facing the excitation sleeve 24 pin-shaped approach 46, which may be under Interposition of a spherical bearing in an opening 48 the exciter sleeve engages.
  • a weight body 50 is such provided that it extends through the swash plate 42 driven linearly and in parallel to the Drilling tool axis 10 can move back and forth.
  • the Forced control is achieved by using the two Long sides 52, 54 of the cuboid weight body 50 open guide recesses 56, 58 are formed, have the pitch circle shape and one parallel to each Tool axis 10 extending rod 60, 62 as Take up longitudinal guide means.
  • the rods 60, 62 are with their longitudinal ends 64, 66 on a housing fixed in operation Component 68, 70 held.
  • the weight body 50 comprises a bore Opening 72 into which a coupling means 74 in the form of a integrally formed on the swash plate 42 spherical head-shaped extension 76 if necessary Intervening order of a spherical bearing intervenes.
  • the linear back and forth movable weight body 50 is cuboid Housing section 78 of the machine housing housed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)

Abstract

The hammer drill has an activator shell forming a cavity for the air cushion in which a striker piston is moved reciprocally by a swashplate drive device. The side of the swashplate (42) diametrically opposite the activator shell has a weight body (50) which can be forced to move reciprocally by the swashplate linearly and parallel to the drill bit axis.

Description

Die Erfindung betrifft einen Bohrhammer mit einem Luftpolsterschlagwerk, bei welchem eine Erregerhülse, die einen das Luftpolster aufnehmenden Raum bildet und in der ein Schlagkolben hin- und herbewegbar ist, konzentrisch zur Bohrwerkzeugachse angeordnet ist, und mit einer die Erregerhülse in Richtung der Bohrwerkzeugachse hin- und herbewegenden Taumeltriebvorrichtung, deren die Taumelscheibe antreibendes Rotationselement auf einer parallel zur Bohrwerkzeugachse jedoch in einem Abstand neben dieser rotierend antreibbar vorgesehen ist. The invention relates to a hammer drill with a Air cushion percussion, in which an excitation sleeve, the forms a space receiving the air cushion and in the a percussion piston is reciprocable, concentric to Drilling tool axis is arranged, and with a die Excitation sleeve back and forth in the direction of the drilling tool axis moving wobble mechanism whose the Swashplate driving rotary element on one parallel to the drilling tool axis but at a distance next to this is provided rotatably drivable.

Unter der Bezeichnung Taumeltriebvorrichtung wird eine Rotations/Translationswandler-Vorrichtung verstanden, bei der die Rotationsbewegung eines antriebsseitigen Elements in eine lineare Translationsbewegung eines abtriebsseitigen Elements umgesetzt wird. Hierbei wirkt ein Rotationselement derart auf ein im folgenden als Taumelscheibe bezeichnetes Taumelelement ein, dass dieses hin und her kippend angetrieben wird und dabei ein weiteres Element in lineare Translationsbewegung versetzen kann.Under the name wobble drive device is a Understand rotation / translation converter device, at which is the rotational movement of a drive-side element into a linear translation movement of an output side Elements is implemented. A rotating element acts here such as on what is referred to below as the swash plate Swash element that this tilts back and forth is driven while doing another element in linear Can translate movement.

Ein Bohrhammer der vorstehend beschriebenen Art ist aus der DB 196 51 828 A1 (Bosch) bekannt.A hammer drill of the type described above is from the DB 196 51 828 A1 (Bosch) known.

Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, die infolge der Massenbeschleunigungen bzw. Verzögerungen auftretende Vibrationsunruhe bei dem bekannten Bohrhammer und die damit verbundenen Handhabungsschwierigkeiten zu reduzieren.Proceeding from this, the present invention is the Task based on the mass accelerations or delayed vibrations in the known hammer drill and the associated Reduce handling difficulties.

Diese Aufgabe wird bei einem Bohrhammer der genannten Art erfindungsgemäß dadurch gelöst, dass auf der der Erregerhülse diametral gegenüberliegenden Seite der Taumelscheibe ein Gewichtskörper zwangsgeführt linear und parallel zur Bohrwerkzeugachse unter der Wirkung der Taumelscheibe hin- und herverschiebbar vorgesehen ist. This task is carried out with a hammer drill of the type mentioned solved according to the invention in that on the Excitation sleeve diametrically opposite side of the Swashplate a weight body linearly and positively driven parallel to the drilling tool axis under the effect of Swash plate is slidably provided.

Dieser Gewichtskörper bildet quasi ein Gegengewicht und erzeugt Gegenmomente zu den infolge der Erregerhülsenbewegung auftretenden bewegten Massen und Momenten. Es wurde mit der Erfindung festgestellt, dass eine wesentliche Erhöhung der Laufruhe durch den linear beweglichen Gewichtskörper erreicht wird, und zwar in einem solchen Maße, wie es durch eine Massenanreicherung der Taumelscheibe auf der entsprechenden Seite nicht erzielt werden kann. Dies liegt darin begründet, dass eine optimale Austarierung in diesem Fall nicht erreicht werden kann, da die lokale Massenanreicherung an der Taumelscheibe keine lineare sondern eine mit der Taumelscheibe pendelnde Bewegung ausführen würde im Unterschied zu den Verhältnissen auf der Schlagwerkseite, wo die Erregerhülse ebenfalls linear bewegbar vorgesehen ist.This weight body forms a counterweight and generates counter moments to those resulting from the Exciting sleeve movement occurring moving masses and Moments. It was found with the invention that a significant increase in smoothness due to the linear moving weight body is achieved, in one such dimensions as is the result of a mass enrichment of the Swashplate not achieved on the corresponding side can be. This is because it is optimal Balance in this case cannot be achieved because the local mass accumulation on the swashplate none linear but one that swings with the swashplate Would perform movement unlike that Conditions on the percussion side where the exciter sleeve is also provided linearly movable.

Die Zwangsführung des Gewichtskörpers ist vorteilhafterweise durch ein im Betrieb gehäusefestes Bauteil des Bohrhammers gebildet. Nach einer bevorzugten Ausführungsform der Erfindung ist die Zwangsführung durch wenigstens einen linear erstreckten Stab gebildet, welcher an einem gehäusefesten Bauteil gehalten ist und in eine in Bewegungsrichtung linear erstreckte Führungsausnehmung in dem Gewichtskörper eingreift. Diese linear erstreckte Führungsausnehmung könnte bspw. eine Durchgangsöffnung in dem Gewichtskörper sein. Demgegenüber erweist es sich jedoch als vorteilhaft, wenn die Führungsausnehmung in dem Gewichtskörper als randoffene Ausnehmung ausgebildet ist, da solchenfalls die Zwangsführung an den Aussenseiten des Gewichtskörpers verwirklicht werden kann. Dies schafft Bauraum im Inneren des Gewichtskörpers, der zur Ausbildung der Kopplung an die Taumelscheibe zur Verfügung steht.The weight body is forced advantageously by a housing fixed in operation Component of the hammer drill formed. According to a preferred Embodiment of the invention is the forced operation formed at least one linearly extending rod, which is held on a housing-fixed component and in a Direction of movement linearly extended guide recess in engages the weight body. This extended linearly Guide recess could, for example, have a through opening in the weight body. In contrast, it turns out however, as advantageous if the guide recess in the Weight body is designed as an open edge recess, since in such a case the forced operation on the outside of the Weight body can be realized. This creates Installation space inside the weight body that is used for training the coupling to the swash plate is available.

In weiterer Ausbildung der Erfindung ist der die Zwangsführung bildende Stab vorteilhafterweise ein Rundstab. Die Länge des Stabs könnte gegenüber der Längserstreckung des Gewichtskörpers kürzer ausgebildet sein und bspw. nur in einem mittleren Bereich des Gewichtskörpers angeordnet sein. Indessen erweist es sich als vorteilhaft, wenn die Länge des Stabs größer ist als die des Gewichtskörpers und dass der Stab an seinen Enden an einem gehäusefesten Bauteil gehalten ist. Hierdurch läßt sich einerseits eine größere Führungslänge und andererseits eine einfachere Montierbarkeit des Gewichtskörpers erreichen.In a further embodiment of the invention is the Advantageously forming rod advantageously Round rod. The length of the rod could be compared to that Longitudinal extension of the weight body is shorter be and for example only in a central area of the Weight body to be arranged. However, it turns out as advantageous if the length of the rod is greater than that of the weight body and that the rod at its ends is held on a housing-fixed component. This leaves on the one hand a longer guide length and on the other hand easier assembly of the weight body to reach.

Es erweist sich desweiteren als vorteilhaft, wenn der Gewichtskörper im Wesentlichen quaderförmig ausgebildet ist. Er läßt sich solchenfalls in einem im Wesentlichen quaderförmigen, vorzugsweise unterhalb des Schlagwerks vorgesehenen Bereich anordnen. Gerade in diesem Bereich ist die Schaffung zusätzlichen Bauraums für den Gewichtskörper unproblematisch und nicht störend. Die Ankopplung des Gewichtskörpers an die Taumelscheibe kann in an sich beliebiger Weise verwirklicht sein, so dass die pendelnde Bewegung der Taumelscheibe in eine lineare Hin- und Herbewegung des Gewichtskörpers gewandelt werden kann. Hierfür hat es sich als vorteilhaft erwiesen, wenn der Gewichtskörper eine Öffnung zur Aufnahme eines radialen Fortsatzes der Taumelscheibe aufweist. Der radiale Fortsatz kann dabei einstückig mit der Taumelscheibe ausgebildet sein, oder es kann sich hierbei um einen in an sich beliebiger Weise anbringbaren Ansatz handeln. Selbstverständlich könnte anstelle der Öffnungen im Gewichtskörper auch ein kalottenförmiges Kupplungsansatzstück an dem Gewichtskörper vorgesehen sein. Indessen erweist sich die Ausbildung einer Öffnung als herstellungstechnisch einfacher und vor allem bauraumsparender. Der radiale Kupplungsfortsatz an der Taumelscheibe ist vorteilhafterweise kugelkopfartig ausgebildet und umfasst somit eine Verschlankung zur Taumelscheibe hin. Dies erleichtert die Kupplung zu dem Gewichtskörper.It also proves advantageous if the Weight body formed essentially cuboid is. In this case, it can be essentially divided into one cuboid, preferably below the striking mechanism arrange the designated area. It is precisely in this area creating additional space for the weight body unproblematic and not disturbing. The coupling of the Weight body on the swashplate can in itself be realized in any way so that the commuting Swashplate movement in a linear reciprocating motion Movement of the weight body can be changed. For this, it has proven to be advantageous if the Weight body an opening for receiving a radial Has extension of the swash plate. The radial extension can be integrally formed with the swash plate or it can be an in itself act in any way attachable approach. Of course, instead of the openings in the Weight body also a dome-shaped Coupling attachment piece can be provided on the weight body. However, the formation of an opening proves to be technically easier and above all space-saving. The radial coupling extension on the Swashplate is advantageously spherical trained and thus includes a slimming Swashplate out. This facilitates the clutch to that Weight body.

Weitere Einzelheiten, Merkmale und Vorteile der Erfindung ergeben sich aus der zeichnerischen Darstellung und nachfolgenden Beschreibung einer bevorzugten Ausführungsform des erfindungsgemäßen Bohrhammers. In der Zeichnung zeigt:

Figur 1
eine teilweise geschnittene Seitenansicht eines erfindungsgemäß ausgebildeten Bohrhammers;
Figur 2
eine ausschnittsweise Darstellung des Bereichs "X" aus Figur 1;
Figur 3
eine Schnittansicht des Bohrhammers nach Figur 1 gesehen in Richtung der Pfeile III-III.
Further details, features and advantages of the invention result from the drawing and the following description of a preferred embodiment of the rotary hammer according to the invention. The drawing shows:
Figure 1
a partially sectioned side view of a hammer drill designed according to the invention;
Figure 2
a partial representation of the area "X" from Figure 1;
Figure 3
a sectional view of the hammer drill according to Figure 1 seen in the direction of arrows III-III.

Figur 1 zeigt einen erfindungsgemäß ausgebildeten Bohrhammer. Von einem Elektromotor 2 erstreckt sich eine Antriebswelle 4 in der Figur vertikal nach oben. Über ein Winkelgetriebe 6 wird eine Antriebsumlenkung um 90° erreicht, die zu einem Ritzel 8 führt. Die Rotationsachse des Ritzels 8 ist parallel zur Bohrwerkzeugachse 10 eines im vorderen Bereich in einen Futterkörper 12 einsetzbaren in der Figur jedoch nicht dargestellten Werkzeugs, bei dem es sich um ein Bohrwerkzeug aber auch um ein reines Schlagwerkzeug, etwa einen Meißel, handeln kann.FIG. 1 shows one designed according to the invention Hammer drill. One extends from an electric motor 2 Drive shaft 4 in the figure vertically upwards. About one Angular gear 6 is a drive deflection by 90 ° reached, which leads to a pinion 8. The axis of rotation of pinion 8 is parallel to drilling tool axis 10 usable in the front area in a chuck body 12 tool not shown in the figure, however it is a drilling tool but also a clean one Percussion tool, such as a chisel.

Das Ritzel 8 steht in kämmendem Eingriff mit einem Zahnrad 14, welches drehfest auf einer Zwischenwelle 16 angeordnet ist, die sich wiederum parallel zur Bohrwerkzeugachse 10 nach vorn erstreckt. In einem vorderen Abschnitt der Zwischenwelle 16 ist wiederum drehtest ein Zahnrad 18 vorgesehen. Neben der Zwischenwelle 16 und konzentrisch zur Bohrwerkzeugachse 10 ist eine mit dem Werkzeug drehtest verbundene Außenhülse 20 vorgesehen, welche mittels eines in Richtung der Werkzeugachse 10 hin und her verschiebbaren Kupplungselements 22 durch kämmenden Eingriff mit dem Zahnrad 18 in Antriebsverbindung oder außer Antriebsverbindung gebracht werden kann.The pinion 8 is in meshing engagement with a gear 14, which is rotatably arranged on an intermediate shaft 16 which in turn is parallel to the drilling tool axis 10 extends forward. In a front section of the The intermediate shaft 16 is again a gear 18 intended. In addition to the intermediate shaft 16 and concentric to Drilling tool axis 10 is a turning test with the tool connected outer sleeve 20 is provided, which by means of a displaceable back and forth in the direction of the tool axis 10 Coupling element 22 by meshing engagement with the Gear 18 in drive connection or except Drive connection can be brought.

Innerhalb der Außenhülse 20 ist eine Erregerhülse 24 in Richtung der Bohrwerkzeugachse 10 hin und her verschiebbar vorgesehen. Die Erregerhülse 24 definiert einen Raum 26, der ein Luftpolster begrenzt und einen Schlagkolben 28 wiederum in Längsrichtung der Bohrwerkzeugachse 10 verschieblich aufnimmt. Durch Hin- und Herbewegen der Erregerhülse 24 wird das Luftpolster in an sich bekannter Weise entspannt bzw. komprimiert und hierdurch eine Hin- und Herbewegung des Schlagkolbens 28 hervorgerufen. Hierbei übt der Schlagkolben 28 mit seiner vorderen Stirnseite 30 eine Schlagwirkung auf einen Zwischenstößel 32 aus, der auf das nicht dargestellte Bohrwerkzeug übertragen wird.Inside the outer sleeve 20 is an excitation sleeve 24 in Movable back and forth in the direction of the drilling tool axis 10 intended. The excitation sleeve 24 defines a space 26, which delimits an air cushion and a percussion piston 28 again in the longitudinal direction of the drilling tool axis 10 slidably accommodates. By moving the Exciter sleeve 24, the air cushion in a known per se Relaxed or compressed and thereby a back and forth Movement of the percussion piston 28 caused. Here the percussion piston 28 exercises with its front end face 30 an impact on an intermediate plunger 32 from the the drilling tool, not shown, is transmitted.

Die Hin- und Herbewegung der Erregerhülse 24 wird durch eine Taumeltriebvorrichtung 34 bewirkt, die nachfolgend beschrieben wird. Die Taumeltriebvorrichtung 34 umfasst ein Rotationselement 36 welches auf der Zwischenwelle 16 gelagert und gegenüber dieser drehbar ist. Das Rotationselement 36 kann durch Verschieben einer Kopplungshülse 38, die drehfest auf der Zwischenwelle 16 vorgesehen ist, über eine Klauenkupplung 40 an ihrer der Kopplungshülse 38 zugewandten Seite drehfest mit der Zwischenwelle 16 verbunden werden (Schlagbetrieb). Das Rotationselement 36 ist von einem Taumelscheibenelement 42 umgeben, wobei zwischen ihnen Wälzkörper 44 vorgesehen sind, derart dass das Rotationselement 36 die Innenschale und die Taumelscheibe 42 die Außenschale des dadurch gebildeten Lagers darstellt. Die Taumelscheibe 42 umfasst an ihrer der Erregerhülse 24 zugewandten Seite einen stiftförmigen Ansatz 46, der gegebenenfalls unter Zwischenschaltung eines Kalottenlagers in eine Öffnung 48 der Erregerhülse eingreift.The back and forth movement of the excitation sleeve 24 is by a wobble drive device 34 causes the following is described. The wobble drive device 34 includes a Rotating element 36 which on the intermediate shaft 16 stored and rotatable relative to this. The Rotating element 36 can be moved by moving one Coupling sleeve 38, which rotatably on the intermediate shaft 16th is provided, via a dog clutch 40 on its Coupling sleeve 38 facing side rotatably with the Intermediate shaft 16 are connected (impact operation). The Rotation element 36 is from a swash plate element 42 surrounded, with rolling elements 44 provided between them are such that the rotating element 36 the inner shell and the swash plate 42 the outer shell of the thereby represents formed camp. The swash plate 42 includes on their side facing the excitation sleeve 24 pin-shaped approach 46, which may be under Interposition of a spherical bearing in an opening 48 the exciter sleeve engages.

Bei drehfester Kopplung des Rotationselements 36 mit der Zwischenwelle 16 führt die Taumelscheibe 42 eine pendelnde oder kippende Bewegung durch. Dabei bewegt sich der stiftförmige Ansatz 46 pendelnd in der Zeichnungsebene der Figur 1, so wie dies durch doppelte Darstellung angedeutet ist. Dabei folgt die Erregerhülse 24 durch entsprechende Hin- und Herbewegung. Das Luftpolster in dem Raum 26 wird komprimiert und dekomprimiert, sodurch der Schlagkolben 28 hin und her bewegt wird.With rotationally fixed coupling of the rotary element 36 with the Intermediate shaft 16 carries the swash plate 42 a swinging or tilting movement. The moves pin-shaped approach 46 oscillating in the plane of the drawing Figure 1, as indicated by double representation is. In this case, the excitation sleeve 24 is followed by corresponding ones Float. The air cushion in the room 26 is compressed and decompressed so that the percussion piston 28 is moved back and forth.

Auf der der Erregerhülse 24 diamtral gegenüberliegenden Seite der Taumelscheibe 42 ist ein Gewichtskörper 50 derart vorgesehen, dass er sich durch die Taumelscheibe 42 angetrieben in einer Zwangsführung linear und parallel zur Bohrwerkzeugachse 10 hin und her bewegen lässt. Die Zwangsführung wird dadurch erreicht, dass an den beiden Längsseiten 52, 54 des quaderförmigen Gewichtskörpers 50 randoffene Führungsausnehmungen 56, 58 ausgebildet sind, die Teilkreisform aufweisen und je einen parallel zur Werkzeugachse 10 erstreckten Stab 60, 62 als Längsführungsmittel aufnehmen. Die Stäbe 60, 62 sind mit ihren Längsenden 64, 66 an einem im Betrieb gehäusefesten Bauteil 68, 70 gehalten.On the exciter sleeve 24 diametrically opposite On the side of the swash plate 42, a weight body 50 is such provided that it extends through the swash plate 42 driven linearly and in parallel to the Drilling tool axis 10 can move back and forth. The Forced control is achieved by using the two Long sides 52, 54 of the cuboid weight body 50 open guide recesses 56, 58 are formed, have the pitch circle shape and one parallel to each Tool axis 10 extending rod 60, 62 as Take up longitudinal guide means. The rods 60, 62 are with their longitudinal ends 64, 66 on a housing fixed in operation Component 68, 70 held.

Der Gewichtskörper 50 umfasst eine als Bohrung ausgebildete Öffnung 72, in welche ein Kopplungsmittel 74 in Form eines einstückig an die Taumelscheibe 42 angeformten kugelkopfförmigen Fortsatzes 76 bei Bedarf unter Zwischenordnung eines Kalottenlagers eingreift.The weight body 50 comprises a bore Opening 72 into which a coupling means 74 in the form of a integrally formed on the swash plate 42 spherical head-shaped extension 76 if necessary Intervening order of a spherical bearing intervenes.

Wenn im schlagbetrieb die Erregerhülse 24 durch die taumelnde oder hin und her kippende Bewegung der Taumelscheibe 42 bzw. des Ansatzes 46 in Richtung der Bohrwerkzeugachse 10 nach hinten bewegt wird, so wird gleichzeitig und parallel zur Bohrwerkzeugachse 10 der Gewichtskörper 50 nach vorn bewegt. Hierdurch kann die Laufunruhe im Schlagbetrieb oder Schlagbohrbetrieb wesentlich reduziert werden. Der linear hin und her bewegbare Gewichtskörper 50 ist in einem quaderförmigen Gehäuseabschnitt 78 des Maschinengehäuses untergebracht.If in field operation the excitation sleeve 24 through the wobbling or rocking motion of the Swash plate 42 or the approach 46 in the direction of Drilling tool axis 10 is moved to the rear, so simultaneously and parallel to the drilling tool axis 10 of the Weight body 50 moved forward. This allows the Uneven running in impact operation or impact drilling operation be significantly reduced. The linear back and forth movable weight body 50 is cuboid Housing section 78 of the machine housing housed.

Claims (7)

Bohrhammer mit einem Luftpolsterschlagwerk, bei welchem eine Erregerhülse (24), die einen das Luftpolster aufnehmenden Raum (26) bildet und in der ein Schlagkolben (28) hin- und herbewegbar ist, konzentrisch zur Bohrwerkzeugachse (10) angeordnet ist, und mit einer die Erregerhülse (24) in Richtung der Bohrwerkzeugachse (10) hin- und herbewegenden Taumeltriebvorrichtung (34), deren die Taumelscheibe (42) antreibendes Rotationselement (36) auf einer parallel zur Bohrwerkzeugachse (10) jedoch in einem Abstand neben dieser rotierend antreibbar vorgesehen ist, dadurch gekennzeichnet, dass auf der der Erregerhülse (24) diametral gegenüberliegenden Seite der Taumelscheibe (42) ein Gewichtskörper (50) zwangsgeführt linear und parallel zur Bohrwerkzeugachse (10) unter der Wirkung der Taumelscheibe (42) hin- und herverschiebbar vorgesehen ist.Hammer drill with an air cushion hammer mechanism, in which an excitation sleeve (24), which forms a space (26) receiving the air cushion and in which a percussion piston (28) can be moved back and forth, is arranged concentrically with the drilling tool axis (10), and with one Exciter sleeve (24) in the direction of the drilling tool axis (10) reciprocating wobble drive device (34), the swash plate (42) driving rotary element (36) is provided on a parallel to the drilling tool axis (10) but at a distance next to this rotatingly drivable, characterized in that on the side of the swash plate (42) diametrically opposite the excitation sleeve (24), a weight body (50) is provided to be linearly displaceable and parallel to the drilling tool axis (10) under the action of the swash plate (42). Bohrhammer nach Anspruch 1, dadurch gekennzeichnet, dass die Zwangsführung des Gewichtskörpers (50) durch ein im Betrieb gehäusefestes Bauteil gebildet ist. Rotary hammer according to claim 1, characterized in that the forced guidance of the weight body (50) through a component which is fixed to the housing during operation is formed. Bohrhammer nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Zwangsführung durch wenigstens einen linear erstreckten Stab (60, 62) gebildet ist, welcher an einem gehäusefesten Bauteil (68, 70) gehalten ist und in eine in Bewegungsrichtung linear erstreckte Führungsausnehmung (56, 58) in dem Gewichtskörper (50) eingreift.Rotary hammer according to claim 1 or 2, characterized characterized that the forced control by at least one linearly extended rod (60, 62) is formed, which on a housing-fixed component (68, 70) is held and in a direction of movement linearly extending guide recess (56, 58) in the Weight body (50) engages. Bohrhammer nach Anspruch 3, dadurch gekennzeichnet, dass die Führungsausnehmung (56, 58) randoffen ausgebildet ist.Rotary hammer according to claim 3, characterized in that the guide recess (56, 58) is open at the edge is trained. Bohrhammer nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass der Stab (60, 62) ein Rundstab ist.Hammer drill according to claim 3 or 4, characterized characterized in that the rod (60, 62) is a round rod is. Bohrhammer nach nach den Ansprüchen 3, 4 oder 5, dadurch gekennzeichnet, dass die Länge des Stabs (60, 62) größer ist als die bei der Hin- und Herbewegung des Gewichtskörpers (50) überstrichene Strecke und dass der Stab (60, 62) an seinen Enden (64, 66) an einem gehäusefesten Bauteil (68, 70) gehalten ist.Hammer drill according to claims 3, 4 or 5, characterized in that the length of the rod (60, 62) is larger than that of the reciprocating motion of the weight body (50) covered distance and that the rod (60, 62) at its ends (64, 66) a component (68, 70) fixed to the housing. Bohrhammer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Gewichtskörper (50) quaderförmig ist.Hammer drill according to one of the preceding claims, characterized in that the weight body (50) is cuboid.
EP99121944A 1998-11-11 1999-11-08 Hammer drilling machine Expired - Lifetime EP1000712B9 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19851888A DE19851888C1 (en) 1998-11-11 1998-11-11 Hammer drill
DE19851888 1998-11-11

Publications (4)

Publication Number Publication Date
EP1000712A2 true EP1000712A2 (en) 2000-05-17
EP1000712A3 EP1000712A3 (en) 2003-02-05
EP1000712B1 EP1000712B1 (en) 2007-01-10
EP1000712B9 EP1000712B9 (en) 2008-02-20

Family

ID=7887350

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99121944A Expired - Lifetime EP1000712B9 (en) 1998-11-11 1999-11-08 Hammer drilling machine

Country Status (4)

Country Link
US (1) US6112830A (en)
EP (1) EP1000712B9 (en)
DE (2) DE19851888C1 (en)
ES (1) ES2281157T3 (en)

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CN105377510A (en) * 2012-12-31 2016-03-02 罗伯特·博世有限公司 Reciprocating tool with fluid driven counterweight
CN104249349A (en) * 2013-06-28 2014-12-31 罗伯特·博世有限公司 Hand-held power tool drive device
CN104249349B (en) * 2013-06-28 2019-05-07 罗伯特·博世有限公司 Hand-held tool machine actuating device
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EP3646918A1 (en) * 2018-11-05 2020-05-06 Mt.Derm Device for punctuation of an organic tissue and drive module

Also Published As

Publication number Publication date
DE59914142D1 (en) 2007-02-22
DE19851888C1 (en) 2000-07-13
US6112830A (en) 2000-09-05
EP1000712A3 (en) 2003-02-05
ES2281157T3 (en) 2007-09-16
EP1000712B9 (en) 2008-02-20
EP1000712B1 (en) 2007-01-10

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