EP2448718A1 - Holding device for hand machine tools, in particular holding device for a drill and/or chipping hammer - Google Patents

Holding device for hand machine tools, in particular holding device for a drill and/or chipping hammer

Info

Publication number
EP2448718A1
EP2448718A1 EP10718957A EP10718957A EP2448718A1 EP 2448718 A1 EP2448718 A1 EP 2448718A1 EP 10718957 A EP10718957 A EP 10718957A EP 10718957 A EP10718957 A EP 10718957A EP 2448718 A1 EP2448718 A1 EP 2448718A1
Authority
EP
European Patent Office
Prior art keywords
holding device
hammer
curved
hammer tube
blocking
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
EP10718957A
Other languages
German (de)
French (fr)
Other versions
EP2448718B1 (en
Inventor
Hubert Steinke
Lars Schmid
Johannes Schnitzler
Gerhard Meixner
Christian Koepf
Jan Koalick
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2448718A1 publication Critical patent/EP2448718A1/en
Application granted granted Critical
Publication of EP2448718B1 publication Critical patent/EP2448718B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • 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
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • 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
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0019—Guide-sleeves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/065—Details regarding assembling of the tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/351—Use of pins
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17042—Lost motion

Definitions

  • Hand tool holding device in particular drill and / or chisel hammer holding device
  • the invention is based on a portable power tool holding device according to the preamble of claim 1.
  • Drill and chisel hammers which comprise a hammer tube and locking bodies which, when assembled, connect the hammer tube to a tool chuck.
  • the invention is based on a hand-held power tool holding device, in particular a drill and / or chisel hammer holding device, with a hammer tube and at least one blocking body, which in an assembled state connects the hammer tube to at least one further holding component.
  • the blocking body has at least one blocking surface curved around at least one load-tilting axis.
  • a "hammer tube” is to be understood in particular an elongate, hollow component, in particular a hollow shaft, in which a racket of a hammer mechanism, a piston, in particular a pot piston, and / or a striker cooperating with a racket in the longitudinal extent of the hammer tube
  • a "load tilting axis” should be understood to mean, in particular, an axle around which the locking body is subjected during a main load, such as, in particular, loading of the hammer tube and / or the holding component to be connected to the hammer tube in the axial direction of the hammer tube and / or in the circumferential direction of the hammer tube , is tilted.
  • the blocking surface may in this case have various curvatures that appear appropriate to the person skilled in the art and may also be produced by various processes that appear appropriate to the person skilled in the art, such as by means of cutting forming processes, e.g. Milling process.
  • the blocking surface is particularly advantageous at least partially by a domed, i. formed by a plastic deformation process surface, in particular by a rolling process, whereby the life can be further increased.
  • the blocking surface of the blocking body may in principle be at least partially concave and / or particularly advantageously at least partially and preferably completely convex.
  • various components of the hand-held power tool holding device that appear appropriate to the person skilled in the art can be connected to the hammer tube.
  • the portable power tool holding device has a tool holder with at least one holding surface corresponding to the blocking body in at least one operating state, a particularly space-saving design, in particular without an additional holding flange, can be achieved.
  • a "tool holder” is to be understood in this context, in particular a component having a receiving area for an insert tool, in particular for a drill and / or chisel.
  • the hammer tube and particularly advantageously at least one further holding component has at least one curved holding surface corresponding to the curved blocking surface in at least one operating state, whereby an occurring surface pressure and an occurring wear can be further reduced.
  • the blocking body may in principle have various forms that appear appropriate to the person skilled in the art, for example, it may be spherical, cuboidal, bean-shaped, etc., in which case correspondingly adapted mating surfaces should then be provided.
  • the locking body viewed in the assembled state, viewed at least in the radial direction of the hammer tube to a greater extent than in the axial direction of the hammer tube, whereby an advantageous overlap can be achieved. It is also proposed that the blocking body has at least one curved end face and / or a curved lateral surface.
  • an "end face” should be understood to mean, in particular, a surface pointing in the longitudinal direction of the blocking body, preferably in the radial direction of the hammer tube, and under a lateral surface, in particular, a surface extending transversely to a longitudinal direction and extending around a longitudinal axis of the blocking body advantageous power flows and small surface pressures can be achieved, in particular if the locking body has at least two locking surfaces.
  • Fig. 1 is a schematic representation of a drill and chisel hammer with a
  • FIG. 2 is an enlarged view of a detail of Figure 1 with exaggeratedly large game Tarm and tilt angle
  • Fig. 3 is an enlarged view of a section of a first alternative with exaggerated large game and tilt angle and
  • Fig. 4 is an enlarged view of a section of a second alternative with exaggerated large game and tilt angle.
  • Figure 1 shows a drill and chisel hammer shown schematically with a partial section through a drill and Chisel hammer holding device of the drill and chisel hammer.
  • the hammer and chisel hammer device comprises a hammer tube 10a, in which a racket 36a of a striking mechanism, not shown, is guided.
  • the rotary hammer and chisel hammer has three equally spaced blocking bodies 12a distributed over the circumference of the hammer tube 10a, which in a mounted state connect the hammer tube 10a in a rotationally fixed and axially fixed manner to a holding component formed by a tool holder 22a.
  • the tool holder 22a has an outer diameter smaller than an inner diameter of the hammer tube 10a and inserted into the hammer tube 10a.
  • the blocking body 12a engages in the radial direction through a round recess of the hammer tube 10a, which is bounded by a holding surface 28a.
  • the blocking body 12a has two blocking surfaces 16a, 18a, which are convexly curved around its load-tilting axis 14a and formed by crowned surfaces (FIG. 2).
  • the blocking body 12a has a cylinder-like design and, viewed in the mounted state, has a greater extent in the radial direction 32a of the hammer tube 10a than in the axial direction 34a of the hammer tube 10a.
  • the blocking surfaces 16a, 18a are formed by opposite end faces of the blocking body 12a.
  • the tool holder 22a has according to the number of locking bodies 12a on its inner circumference blind hole recesses 38a, namely blind holes, whose central axes extend in the radial direction of the hammer tube 10a.
  • the blind hole recess 38a is bounded in the radial direction by a holding surface 24a of the tool holder 22a that is concave in a state of operation with the locking body 12a and concavely curved around the load tilting axis 14a.
  • the rotary hammer and chisel hammer device has a hole ring 40a penetrated radially by the lock body 12a.
  • the rotary hammer and chisel holding device has a holding member 42a formed on its radially inwardly facing side has a concave support surface 30a, which corresponds in an operating condition with the locking surface 16a of the locking body 12a.
  • the perforated ring 40a has a stepped outer contour and the retaining ring 42a has a stepped inner contour.
  • the inner contour and the outer contour are matched to one another and the inner contour and the outer contour engage in one another in a form-fitting manner in the axial and radial directions.
  • the perforated ring 40a and the retaining ring 42a are secured in the axial direction 34a of the hammer tube 10a within a portable power tool housing 46a by means of a clamping ring 44a and by means of a step 48a integrally formed on the portable power tool housing 46a. Occurs during operation, for example, the tool holder 22a in an axial direction facing away from the racket 36a axial force F1, the locking body 12a by the force F1 and a force F1 opposing reaction force F2 about the perpendicular to the axial direction 34a of the hammer tube 10a extending load tilting axis 14a tilts , as exaggerated in Figure 2 for illustrative purposes.
  • the curved locking surfaces 16a, 18a and the curved support surfaces 24a, 30a advantageously large contact surfaces, small surface pressures and a small wear can be achieved.
  • FIGS. 3 and 4 show sections of alternative embodiments. Constant components, features and functions are numbered in principle with the same reference numerals. To distinguish the embodiments, the letters a to c are added to the reference numerals. The following description is basically limited to differences from the exemplary embodiment in FIGS. 1 and 2. With regard to features and functions that remain the same, reference may be made to the description of the exemplary embodiment in FIGS. 1 and 2.
  • FIG. 3 shows a section of an alternative drill and chisel hammer holding device with barrel-shaped blocking bodies 12b, which connect a hammer tube 10b and a tool holder 22b of the rotary and chisel holding device in a rotationally and axially fixed manner.
  • the blocking body 12b has a curved blocking surface 20b, namely a convexly curved lateral surface and planar end faces 16b, 18b.
  • the hammer tube 10b has a radial passage recess per blocking body 12b which is delimited by a holding surface 28b, which is concavely curved about a loading tilting axis 14b, of the hammer tube 10b, which in an operating state corresponds to the blocking surface 20b.
  • the holding surface 28b of the hammer tube 10b is a lateral surface or surrounds the blocking body 12b by 360 °. Furthermore, the tool holder 22b has a radial blind hole recess, which is delimited by a holding surface 26b, which concavely curves around the load-tilting spindle 14b and, during operation, corresponds with the blocking surface 20b.
  • the holding surface 26b is formed by a lateral surface or surrounds the blocking body 12b by 360 °.
  • the hammer tube 10b is limited in the radial direction directly by a hand tool housing 46b in the region of the locking body 12b.
  • the hammer tube 10b is mounted directly in the portable power tool housing 46b.
  • FIG. 4 shows a section of an alternative drill and chisel hammer holding device with barrel-shaped blocking bodies 12c, which connect a hammer tube 10c and a tool holder 22c of the hammer and chisel holder in a rotationally fixed and axially fixed manner.
  • the blocking body 12c has three curved blocking surfaces 16c, 18c, 20c, namely a convexly curved lateral surface and two convexly curved end faces.
  • the hammer tube 10c has a radial passage recess per blocking body 12c which is delimited by a holding surface 28c, which is concavely curved about a loading tilting axis 14c, of the hammer tube 10c, which in an operating state corresponds to the blocking surface 20c.
  • the tool holder 22c has a radial blind hole recess which is delimited by a holding surface 26c, which concavely curves around the load-tilting spindle 14c and, during operation, corresponds with the blocking surface 20c.
  • the holding surface 26c is formed by a lateral surface or surrounds the blocking body 12c by 360 °.
  • the hammer tube 10c is bounded in the radial direction directly by a hand-held power tool housing 46c in the region of the blocking body 12c.
  • the curved end surfaces of the locking body 12c correspond to a radially inwardly facing concave support surface 30c of the portable power tool housing 46c and a radially outwardly facing concave support surface 24c of the tool holder 22c.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Clamps And Clips (AREA)

Abstract

The invention relates to a holding device for hand machine tools, in particular a drill and/or chipping hammer holding device, having a hammer tube (10a; 10b; 10c) and at least one blocking body (12a; 12b; 12c), which, when installed, connects the hammer tube (10a; 10b; 10c) to at least one additional holding component. According to the invention, the blocking body (12a; 12b; 12c) is provided with at least one blocking surface (16a, 18a; 20b; 16c, 18c, 20c) that is curved around at least one load tipping axis (14a; 14b; 14c).

Description

Beschreibung  description
Handwerkzeugmaschinenhaltevorrichtung, insbesondere Bohr- und/oder Meißelham- merhaltevorrichtung Hand tool holding device, in particular drill and / or chisel hammer holding device
Stand der Technik State of the art
Die Erfindung geht aus von einer Handwerkzeugmaschinenhaltevorrichtung nach dem Oberbegriff des Anspruchs 1. The invention is based on a portable power tool holding device according to the preamble of claim 1.
Es sind Bohr- und Meißelhammerhaltevorrichtungen bekannt, die ein Hammerrohr und Sperrkörper aufweisen, die in montiertem Zustand das Hammerrohr mit einem Werkzeugfutter verbinden. Drill and chisel hammers are known which comprise a hammer tube and locking bodies which, when assembled, connect the hammer tube to a tool chuck.
Offenbarung der Erfindung Disclosure of the invention
Die Erfindung geht aus von einer Handwerkzeugmaschinenhaltevorrichtung, insbesondere Bohr- und/oder Meißelhammerhaltevorrichtung, mit einem Hammerrohr und wenigstens einem Sperrkörper, der in einem montierten Zustand das Hammerrohr mit zumindest einem weiteren Haltebauteil verbindet. The invention is based on a hand-held power tool holding device, in particular a drill and / or chisel hammer holding device, with a hammer tube and at least one blocking body, which in an assembled state connects the hammer tube to at least one further holding component.
Es wird vorgeschlagen, dass der Sperrköper wenigstens eine um wenigstens eine Belastungskippachse gekrümmte Sperrfläche aufweist. Dabei soll unter einem„Hammerrohr" insbesondere ein langgestrecktes, hohles Bauteil, insbesondere eine Hohlwelle, verstanden werden, in dem ein Schläger eines Schlagwerks, ein Kolben, insbesondere ein Topfkolben, und/oder ein mit einem Schläger zusammenwirkender Schlagbolzen in Längserstreckung des Hammerrohrs geführt ist. Unter einer„Belastungskippachse" soll insbesondere eine Achse verstanden werden, um die der Sperrkörper bei einer Hauptbelastung, wie insbesondere bei einer Belastung des Hammerrohrs und/oder des mit dem Hammerrohr zu verbindenden Haltebauteils in axialer Richtung des Hammerrohrs und/oder in Umfangsrichtung des Hammerrohrs, verkippt wird. Durch eine entspre- chende Ausgestaltung können vorteilhaft große tragende Flächen, kleine Flächenpressungen, geringer Verschleiß und eine lange Lebensdauer erzielt werden. It is proposed that the blocking body has at least one blocking surface curved around at least one load-tilting axis. In this case, a "hammer tube" is to be understood in particular an elongate, hollow component, in particular a hollow shaft, in which a racket of a hammer mechanism, a piston, in particular a pot piston, and / or a striker cooperating with a racket in the longitudinal extent of the hammer tube A "load tilting axis" should be understood to mean, in particular, an axle around which the locking body is subjected during a main load, such as, in particular, loading of the hammer tube and / or the holding component to be connected to the hammer tube in the axial direction of the hammer tube and / or in the circumferential direction of the hammer tube , is tilted. By a corresponding In addition, it is advantageous to achieve large bearing surfaces, small surface pressures, low wear and a long service life.
Die Sperrfläche kann dabei verschiedene, dem Fachmann als sinnvoll erscheinende Krümmungen aufweisen und auch durch verschiedene, dem Fachmann als sinnvoll erscheinende Verfahren hergestellt sein, wie mittels spanenden Umformverfahren, z.B. Fräsverfahren. Besonders vorteilhaft ist die Sperrfläche jedoch zumindest teilweise von einer bombierten, d.h. durch einen plastischen Verformungsvorgang hergestellten Fläche gebildet, wie insbesondere durch einen Walzvorgang, wodurch die Lebensdauer weiter gesteigert werden kann. Die Sperrfläche des Sperrkörpers kann grundsätzlich zumindest teilweise konkav und/oder besonders vorteilhaft zumindest teilweise und vorzugsweise vollständig konvex ausgebildet sein. The blocking surface may in this case have various curvatures that appear appropriate to the person skilled in the art and may also be produced by various processes that appear appropriate to the person skilled in the art, such as by means of cutting forming processes, e.g. Milling process. However, the blocking surface is particularly advantageous at least partially by a domed, i. formed by a plastic deformation process surface, in particular by a rolling process, whereby the life can be further increased. The blocking surface of the blocking body may in principle be at least partially concave and / or particularly advantageously at least partially and preferably completely convex.
Mittels eines oder mehrerer entsprechender Sperrkörper können verschiedene, dem Fachmann als sinnvoll erscheinende Bauteile der Handwerkzeugmaschinenhaltevor- richtung mit dem Hammerrohr verbunden sein. Weist die Handwerkzeugmaschinenhal- tevorrichtung jedoch einen Werkzeughalter mit wenigstens einer in zumindest einem Betriebszustand mit dem Sperrkörper korrespondierenden Haltefläche auf, kann eine besonders Platz sparende Konstruktion, insbesondere ohne zusätzlichen Halteflansch, erreicht werden. Unter einem„Werkzeughalter" soll in diesem Zusammenhang insbesondere ein Bauteil verstanden werden, das einen Aufnahmebereich für ein Einsatzwerkzeug, wie insbesondere für einen Bohrer und/oder Meißel, aufweist. By means of one or more corresponding blocking bodies, various components of the hand-held power tool holding device that appear appropriate to the person skilled in the art can be connected to the hammer tube. However, if the portable power tool holding device has a tool holder with at least one holding surface corresponding to the blocking body in at least one operating state, a particularly space-saving design, in particular without an additional holding flange, can be achieved. A "tool holder" is to be understood in this context, in particular a component having a receiving area for an insert tool, in particular for a drill and / or chisel.
In einer weiteren Ausgestaltung der Erfindung wird vorgeschlagen, dass das Hammerrohr und besonders vorteilhaft zumindest ein weiteres Haltebauteil mindestens eine mit der gekrümmten Sperrfläche in zumindest einem Betriebszustand korrespondierende, gekrümmte Haltefläche aufweist, wodurch eine auftretende Flächenpressung und ein auftretender Verschleiß weiter reduziert werden kann. In a further embodiment of the invention, it is proposed that the hammer tube and particularly advantageously at least one further holding component has at least one curved holding surface corresponding to the curved blocking surface in at least one operating state, whereby an occurring surface pressure and an occurring wear can be further reduced.
Der Sperrkörper kann grundsätzlich verschiedene, dem Fachmann als sinnvoll erscheinende Formen aufweisen, beispielsweise kann dieser kugelförmig, quaderförmig, bohnenförmig usw. ausgebildet sein, wobei dann vorzugsweise entsprechend ange- passte Gegenflächen vorgesehen sein sollten. Besonders vorteilhaft weist jedoch der Sperrkörper im montierten Zustand betrachtet zumindest in radialer Richtung des Hammerrohrs eine größere Erstreckung auf als in axialer Richtung des Hammerrohrs, wodurch eine vorteilhafte Überdeckung erreicht werden kann. Ferner wird vorgeschlagen, dass der Sperrkörper wenigstens eine gekrümmte Stirnfläche und/oder eine gekrümmte Mantelfläche aufweist. Dabei soll unter einer„Stirnfläche" insbesondere eine in Längsrichtung des Sperrkörpers, vorzugsweise in radialer Richtung des Hammerrohrs, weisende Fläche und unter einer Mantelfläche insbesondere eine quer zu einer Längsrichtung weisende, sich um eine Längsachse des Sperrkörpers erstreckende Fläche verstanden werden. Durch eine entsprechende Ausgestaltung können vorteilhafte Kraftflüsse und kleine Flächenpressungen erzielt werden, und zwar insbesondere, wenn der Sperrkörper zumindest zwei Sperrflächen aufweist. The blocking body may in principle have various forms that appear appropriate to the person skilled in the art, for example, it may be spherical, cuboidal, bean-shaped, etc., in which case correspondingly adapted mating surfaces should then be provided. Particularly advantageous, however, the locking body viewed in the assembled state, viewed at least in the radial direction of the hammer tube to a greater extent than in the axial direction of the hammer tube, whereby an advantageous overlap can be achieved. It is also proposed that the blocking body has at least one curved end face and / or a curved lateral surface. In this case, an "end face" should be understood to mean, in particular, a surface pointing in the longitudinal direction of the blocking body, preferably in the radial direction of the hammer tube, and under a lateral surface, in particular, a surface extending transversely to a longitudinal direction and extending around a longitudinal axis of the blocking body advantageous power flows and small surface pressures can be achieved, in particular if the locking body has at least two locking surfaces.
Zeichnung drawing
Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen. Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.
Es zeigen: Show it:
Fig. 1 eine schematische Darstellung eines Bohr- und Meißelhammers mit einemFig. 1 is a schematic representation of a drill and chisel hammer with a
Teilschnitt durch eine Bohr- und Meißelhammerhaltevorrichtung, Partial section through a drill and chisel hammer holding device,
Fig. 2 eine vergrößerte Darstellung eines Ausschnitts aus Figur 1 mit übertrieben groß dargestelltem Spiel und Kippwinkel, 2 is an enlarged view of a detail of Figure 1 with exaggeratedly large game Spielem and tilt angle,
Fig. 3 eine vergrößerte Darstellung eines Ausschnitts einer ersten Alternative mit übertrieben groß dargestelltem Spiel und Kippwinkel und Fig. 3 is an enlarged view of a section of a first alternative with exaggerated large game and tilt angle and
Fig. 4 eine vergrößerte Darstellung eines Ausschnitts einer zweiten Alternative mit übertrieben groß dargestelltem Spiel und Kippwinkel. Fig. 4 is an enlarged view of a section of a second alternative with exaggerated large game and tilt angle.
Beschreibung der Ausführungsbeispiele Description of the embodiments
Figur 1 zeigt einen schematisch dargestellten Bohr- und Meißelhammer mit einem Teilschnitt durch eine Bohr- und Meißelhammerhaltevorrichtung des Bohr- und Meißelhammers. Die Bohr- und Meißelhammerhaltevorrichtung umfasst ein Hammerrohr 10a, in dem ein Schläger 36a eines nicht näher dargestellten Schlagwerks geführt ist. Ferner weist die Bohr- und Meißelhammerhaltevorrichtung drei gleichmäßig über den Umfang des Hammerrohrs 10a verteilte, gleichartige Sperrkörper 12a auf, die in einem montierten Zustand das Hammerrohr 10a mit einem von einem Werkzeughalter 22a gebildeten Haltebauteil drehfest und axial fest verbinden. Der Werkzeughalter 22a weist einen Außendurchmesser auf, der kleiner ist als ein Innendurchmesser des Hammerrohrs 10a und in das Hammerrohr 10a eingesteckt ist. Figure 1 shows a drill and chisel hammer shown schematically with a partial section through a drill and Chisel hammer holding device of the drill and chisel hammer. The hammer and chisel hammer device comprises a hammer tube 10a, in which a racket 36a of a striking mechanism, not shown, is guided. Furthermore, the rotary hammer and chisel hammer has three equally spaced blocking bodies 12a distributed over the circumference of the hammer tube 10a, which in a mounted state connect the hammer tube 10a in a rotationally fixed and axially fixed manner to a holding component formed by a tool holder 22a. The tool holder 22a has an outer diameter smaller than an inner diameter of the hammer tube 10a and inserted into the hammer tube 10a.
Der Sperrkörper 12a durchgreift in radialer Richtung eine runde Ausnehmung des Hammerrohrs 10a, die von einer Haltefläche 28a begrenzt ist. Der Sperrkörper 12a weist zwei um seine Belastungskippachse 14a konvex gekrümmte, von bombierten Flächen gebildete Sperrflächen 16a, 18a auf (Figur 2). Der Sperrkörper 12a ist zylinderartig ausgebildet und weist im montierten Zustand betrachtet in radialer Richtung 32a des Hammerrohrs 10a eine größere Erstreckung auf als in axialer Richtung 34a des Hammerrohrs 10a. Die Sperrflächen 16a, 18a werden von gegenüberliegenden Stirnflächen des Sperrkörpers 12a gebildet. The blocking body 12a engages in the radial direction through a round recess of the hammer tube 10a, which is bounded by a holding surface 28a. The blocking body 12a has two blocking surfaces 16a, 18a, which are convexly curved around its load-tilting axis 14a and formed by crowned surfaces (FIG. 2). The blocking body 12a has a cylinder-like design and, viewed in the mounted state, has a greater extent in the radial direction 32a of the hammer tube 10a than in the axial direction 34a of the hammer tube 10a. The blocking surfaces 16a, 18a are formed by opposite end faces of the blocking body 12a.
Der Werkzeughalter 22a weist entsprechend der Anzahl der Sperrkörper 12a an seinem Innenumfang Sacklochausnehmungen 38a, und zwar Sacklochbohrungen auf, deren Mittelachsen sich in radialer Richtung zum Hammerrohr 10a erstrecken. Die Sack- lochausnehmung 38a wird in radialer Richtung von einer in einem Betriebszustand mit dem Sperrkörper 12a korrespondierenden, um die Belastungskippachse 14a konkav gekrümmten Haltefläche 24a des Werkzeughalters 22a begrenzt. Ferner weist die Bohr- und Meißelhammerhaltevorrichtung im radial äußeren Bereich des Hammerrohrs 10a einen Lochring 40a auf, der in radialer Richtung von dem Sperrkörper 12a durchdrungen wird. Im radial äußeren Bereich des Lochrings 40a weist die Bohr- und Meißelhammerhaltevorrichtung ein von einem Haltering 42a gebildetes Haltebauteil auf, das an seiner radial nach innen weisenden Seite eine konkav gekrümmte Haltefläche 30a aufweist, die in einem Betriebszustand mit der Sperrfläche 16a des Sperrkörpers 12a korrespondiert. Der Lochring 40a weist eine gestufte Außenkontur und der Haltering 42a weist eine gestufte Innenkontur auf. Die Innenkontur und die Außenkontur sind aufeinander abgestimmt und die Innenkontur und die Außenkontur greifen in axialer und radialer Richtung formschlüssig ineinander. Der Lochring 40a und der Haltering 42a sind in axialer Richtung 34a des Hammerrohrs 10a innerhalb eines Handwerkzeugmaschinengehäuses 46a mittels eines Spannrings 44a und mittels einer an das Handwerkzeugmaschinengehäuse 46a angeformten Stufe 48a gesichert. Tritt im Betrieb beispielsweise eine den Werkzeughalter 22a in eine vom Schläger 36a abgewandte Axialrichtung belastende Kraft F1 auf, wird der Sperrkörper 12a durch die Kraft F1 und eine der Kraft F1 entgegengerichtete Reaktionskraft F2 um die senkrecht zur axialen Richtung 34a des Hammerrohrs 10a verlaufende Belastungskippachse 14a verkippt, wie dies in Figur 2 zur Veranschaulichung übertrieben dargestellt ist. Durch die gekrümmten Sperrflächen 16a, 18a und die gekrümmten Halteflächen 24a, 30a werden vorteilhaft große Kontaktflächen, kleine Flächenpressungen und ein kleiner Verschleiß erreicht. The tool holder 22a has according to the number of locking bodies 12a on its inner circumference blind hole recesses 38a, namely blind holes, whose central axes extend in the radial direction of the hammer tube 10a. The blind hole recess 38a is bounded in the radial direction by a holding surface 24a of the tool holder 22a that is concave in a state of operation with the locking body 12a and concavely curved around the load tilting axis 14a. Further, in the radially outer portion of the hammer tube 10a, the rotary hammer and chisel hammer device has a hole ring 40a penetrated radially by the lock body 12a. In the radially outer region of the perforated ring 40a, the rotary hammer and chisel holding device has a holding member 42a formed on its radially inwardly facing side has a concave support surface 30a, which corresponds in an operating condition with the locking surface 16a of the locking body 12a. The perforated ring 40a has a stepped outer contour and the retaining ring 42a has a stepped inner contour. The inner contour and the outer contour are matched to one another and the inner contour and the outer contour engage in one another in a form-fitting manner in the axial and radial directions. The perforated ring 40a and the retaining ring 42a are secured in the axial direction 34a of the hammer tube 10a within a portable power tool housing 46a by means of a clamping ring 44a and by means of a step 48a integrally formed on the portable power tool housing 46a. Occurs during operation, for example, the tool holder 22a in an axial direction facing away from the racket 36a axial force F1, the locking body 12a by the force F1 and a force F1 opposing reaction force F2 about the perpendicular to the axial direction 34a of the hammer tube 10a extending load tilting axis 14a tilts , as exaggerated in Figure 2 for illustrative purposes. The curved locking surfaces 16a, 18a and the curved support surfaces 24a, 30a advantageously large contact surfaces, small surface pressures and a small wear can be achieved.
Die Figuren 3 und 4 zeigen Ausschnitte von alternativen Ausführungsbeispielen. Gleich bleibende Bauteile, Merkmale und Funktionen sind grundsätzlich mit den gleichen Bezugszeichen beziffert. Zur Unterscheidung der Ausführungsbeispiele sind den Bezugszeichen die Buchstaben a bis c hinzugefügt. Die nachfolgende Beschreibung beschränkt sich grundsätzlich auf Unterschiede zu dem Ausführungsbeispiel in den Figuren 1 und 2. Bezüglich gleich bleibender Merkmale und Funktionen darf auf die Beschreibung des Ausführungsbeispiels in den Figuren 1 und 2 verwiesen werden. Figures 3 and 4 show sections of alternative embodiments. Constant components, features and functions are numbered in principle with the same reference numerals. To distinguish the embodiments, the letters a to c are added to the reference numerals. The following description is basically limited to differences from the exemplary embodiment in FIGS. 1 and 2. With regard to features and functions that remain the same, reference may be made to the description of the exemplary embodiment in FIGS. 1 and 2.
Figur 3 zeigt einen Ausschnitt einer alternativen Bohr- und Meißelhammerhaltevorrich- tung mit tonnenförmigen Sperrkörpern 12b, die ein Hammerrohr 10b und einen Werkzeughalter 22b der Bohr- und Meißelhammerhaltevorrichtung drehfest und axialfest miteinander verbinden. Der Sperrkörper 12b weist eine gekrümmte Sperrfläche 20b, und zwar eine konvex gekrümmte Mantelfläche und ebene Stirnflächen 16b, 18b auf. Das Hammerohr 10b weist je Sperrkörper 12b eine radiale Durchgangsausnehmung auf, die von einer um eine Belastungskippachse 14b konkav gekrümmten Haltefläche 28b des Hammerrohrs 10b begrenzt ist, die in einem Betriebszustand mit der Sperrfläche 20b korrespondiert. Die Haltefläche 28b des Hammerohrs 10b ist eine Mantelfläche bzw. umschließt den Sperrkörper 12b um 360°. Ferner weist der Werkzeughalter 22b eine radiale Sacklochausnehmung auf, die von einer um die Belastungskippachse 14b konkav gekrümmten, im Betrieb mit der Sperrfläche 20b korrespondierenden Haltefläche 26b begrenzt ist. Die Haltefläche 26b wird von einer Mantelfläche gebildet bzw. umschließt den Sperrkörper 12b um 360°. Gegenüber dem Ausführungsbeispiel in den Figuren 1 und 2 wird das Hammerrohr 10b im Bereich des Sperrkörpers 12b in radialer Richtung unmittelbar von einem Handwerkzeugmaschinengehäuse 46b begrenzt. Das Hammerrohr 10b ist unmittelbar im Handwerkzeugmaschinengehäuse 46b gelagert. Figur 4 zeigt einen Ausschnitt einer alternativen Bohr- und Meißelhammerhaltevorrich- tung mit tonnenförmigen Sperrkörpern 12c, die ein Hammerrohr 10c und einen Werkzeughalter 22c der Bohr- und Meißelhammerhaltevorrichtung drehfest und axialfest miteinander verbinden. Der Sperrkörper 12c weist drei gekrümmte Sperrflächen 16c, 18c, 20c, und zwar eine konvex gekrümmte Mantelfläche und zwei konvex gekrümmte Stirnflächen auf. Das Hammerohr 10c weist je Sperrkörper 12c eine radiale Durch- gangsausnehmung auf, die von einer um eine Belastungskippachse 14c konkav gekrümmte Haltefläche 28c des Hammerrohrs 10c begrenzt ist, die in einem Betriebszustand mit der Sperrfläche 20c korrespondiert. Ferner weist der Werkzeughalter 22c eine radiale Sacklochausnehmung auf, die von einer um die Belastungskippachse 14c konkav gekrümmten, im Betrieb mit der Sperrfläche 20c korrespondierenden Haltefläche 26c begrenzt ist. Die Haltefläche 26c wird von einer Mantelfläche gebildet bzw. umschließt den Sperrkörper 12c um 360°. Das Hammerrohr 10c ist im Bereich des Sperrkörpers 12c in radialer Richtung unmittelbar von einem Handwerkzeugmaschinengehäuse 46c begrenzt. Die gekrümmten Stirnflächen des Sperrkörpers 12c korrespondieren mit einer radial nach innen weisenden konkaven Haltefläche 30c des Handwerkzeugmaschinengehäuses 46c und einer radial nach außen weisenden konkaven Haltefläche 24c des Werkzeughalters 22c. FIG. 3 shows a section of an alternative drill and chisel hammer holding device with barrel-shaped blocking bodies 12b, which connect a hammer tube 10b and a tool holder 22b of the rotary and chisel holding device in a rotationally and axially fixed manner. The blocking body 12b has a curved blocking surface 20b, namely a convexly curved lateral surface and planar end faces 16b, 18b. The hammer tube 10b has a radial passage recess per blocking body 12b which is delimited by a holding surface 28b, which is concavely curved about a loading tilting axis 14b, of the hammer tube 10b, which in an operating state corresponds to the blocking surface 20b. The holding surface 28b of the hammer tube 10b is a lateral surface or surrounds the blocking body 12b by 360 °. Furthermore, the tool holder 22b has a radial blind hole recess, which is delimited by a holding surface 26b, which concavely curves around the load-tilting spindle 14b and, during operation, corresponds with the blocking surface 20b. The holding surface 26b is formed by a lateral surface or surrounds the blocking body 12b by 360 °. Compared to the embodiment in Figures 1 and 2, the hammer tube 10b is limited in the radial direction directly by a hand tool housing 46b in the region of the locking body 12b. The hammer tube 10b is mounted directly in the portable power tool housing 46b. FIG. 4 shows a section of an alternative drill and chisel hammer holding device with barrel-shaped blocking bodies 12c, which connect a hammer tube 10c and a tool holder 22c of the hammer and chisel holder in a rotationally fixed and axially fixed manner. The blocking body 12c has three curved blocking surfaces 16c, 18c, 20c, namely a convexly curved lateral surface and two convexly curved end faces. The hammer tube 10c has a radial passage recess per blocking body 12c which is delimited by a holding surface 28c, which is concavely curved about a loading tilting axis 14c, of the hammer tube 10c, which in an operating state corresponds to the blocking surface 20c. Furthermore, the tool holder 22c has a radial blind hole recess which is delimited by a holding surface 26c, which concavely curves around the load-tilting spindle 14c and, during operation, corresponds with the blocking surface 20c. The holding surface 26c is formed by a lateral surface or surrounds the blocking body 12c by 360 °. The hammer tube 10c is bounded in the radial direction directly by a hand-held power tool housing 46c in the region of the blocking body 12c. The curved end surfaces of the locking body 12c correspond to a radially inwardly facing concave support surface 30c of the portable power tool housing 46c and a radially outwardly facing concave support surface 24c of the tool holder 22c.

Claims

Ansprüche claims
1. Handwerkzeugmaschinenhaltevorrichtung, insbesondere Bohr- und/oder Meißel- hammerhaltevorrichtung, mit einem Hammerrohr (10a; 10b; 10c) und wenigstens einem Sperrkörper (12a; 12b; 12c), der in einem montierten Zustand das Hammerrohr (10a; 10b; 10c) mit zumindest einem weiteren Haltebauteil verbindet, dadurch gekennzeichnet, dass der Sperrköper (12a; 12b; 12c) wenigstens eine um wenigstens eine Belastungskippachse (14a; 14b; 14c) gekrümmte Sperrfläche (16a, 18a; 20b; 16c, 18c, 20c) aufweist. 1. A handheld power tool holding device, in particular a drill and / or chisel hammer holding device, with a hammer tube (10a, 10b, 10c) and at least one blocking body (12a, 12b, 12c) which in an assembled state supports the hammer tube (10a; 10b; 10c). with at least one further holding member, characterized in that the Sperrköper (12a, 12b, 12c) at least one about at least one load tilting axis (14a, 14b, 14c) curved locking surface (16a, 18a, 20b, 16c, 18c, 20c).
2. Handwerkzeugmaschinenhaltevorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Sperrfläche (16a, 18a; 20b; 16c, 18c, 20c) zumindest teilweise von einer bombierten Fläche gebildet ist. 2. hand tool machine holding device according to claim 1, characterized in that the locking surface (16a, 18a; 20b, 16c, 18c, 20c) is at least partially formed by a cambered surface.
3. Handwerkzeugmaschinenhaltevorrichtung nach Anspruch 1 oder 2, gekennzeichnet durch einen Werkzeughalter (22a; 22b; 22c) mit wenigstens einer in zumindest einem Betriebszustand mit dem Sperrköper (12a; 12b; 12c) korrespondierenden Haltefläche (24a; 26b; 24c; 26c). 3. hand tool machine holding device according to claim 1 or 2, characterized by a tool holder (22a, 22b, 22c) having at least one in at least one operating state with the Sperrköper (12a, 12b, 12c) corresponding holding surface (24a, 26b, 24c, 26c).
4. Handwerkzeugmaschinenhaltevorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Hammerrohr (10b; 10c) mindestens eine mit der gekrümmten Sperrfläche (20b; 20c) in zumindest einem Betriebszustand korrespondierende, gekrümmte Haltefläche (28b; 28c) aufweist. A portable power tool holding device according to one of the preceding claims, characterized in that the hammer tube (10b; 10c) has at least one curved holding surface (28b; 28c) corresponding to the curved blocking surface (20b; 20c) in at least one operating state.
5. Handwerkzeugmaschinenhaltevorrichtung nach einem der vorhergehenden Ansprüche, gekennzeichnet durch das zumindest eine weitere Haltebauteil, das eine mit der gekrümmten Sperrfläche (16a, 18a; 20b; 16c, 18c, 20c) in zumindest einem Betriebszustand korrespondierende, gekrümmte Haltefläche (24a, 30a; 26b; 24c, 26c, 30c) aufweist. 5. hand tool machine holding device according to one of the preceding claims, characterized by the at least one further holding member having a with the curved locking surface (16a, 18a; 20b; 16c, 18c, 20c) in at least one operating state corresponding curved retaining surface (24a, 30a, 26b 24c, 26c, 30c).
6. Handwerkzeugmaschinenhaltevorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Sperrkörper (12a; 12b; 12c) im montierten Zustand betrachtet in radialer Richtung (32a; 32b; 32c) des Hammerrohrs (10a; 10b; 10c) eine größere Erstreckung aufweist als in axialer Richtung (34a; 34b; 34c) des Hammerrohrs (10a). 6. Hand tool holding device according to one of the preceding claims, characterized in that the locking body (12a; 12b; 12c) viewed in the mounted state in the radial direction (32a; 32b; 32c) of the hammer tube (10a; 10b, 10c) has a greater extent than in the axial direction (34a; 34b; 34c) of the hammer tube (10a).
7. Handwerkzeugmaschinenhaltevorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, 7. Hand tool holding device according to one of the preceding claims, characterized in that
dass der Sperrköper (12a; 12c) wenigstens eine gekrümmte Stirnfläche aufweist.  in that the blocking body (12a, 12c) has at least one curved end face.
8. Handwerkzeugmaschinenhaltevorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Sperrkörper (12b; 12c) wenigstens eine gekrümmte Mantelfläche aufweist. 8. Hand tool holding device according to one of the preceding claims, characterized in that the blocking body (12b, 12c) has at least one curved lateral surface.
9. Handwerkzeugmaschinenhaltevorrichtung, dadurch gekennzeichnet, dass der9. hand tool machine holding device, characterized in that the
Sperrkörper (12a; 12c) zumindest zwei gekrümmte Sperrflächen (16a, 18a; 16c, 18c, 20c) aufweist. Locking body (12a, 12c) at least two curved locking surfaces (16a, 18a, 16c, 18c, 20c).
10. Handwerkzeugmaschine mit einer Werkzeughaltevorrichtung nach einem der vorhergehenden Ansprüche. 10. Hand tool with a tool holding device according to one of the preceding claims.
EP10718957.3A 2009-06-30 2010-04-30 Holding device for hand machine tools, in particular holding device for a drill and/or chipping hammer Active EP2448718B1 (en)

Applications Claiming Priority (2)

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DE102009027316A DE102009027316A1 (en) 2009-06-30 2009-06-30 Hand tool machine holding device, in particular drill and / or chisel hammer device
PCT/EP2010/055880 WO2011000595A1 (en) 2009-06-30 2010-04-30 Holding device for hand machine tools, in particular holding device for a drill and/or chipping hammer

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EP2448718A1 true EP2448718A1 (en) 2012-05-09
EP2448718B1 EP2448718B1 (en) 2016-01-27

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EP (1) EP2448718B1 (en)
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US20160271778A1 (en) * 2015-03-21 2016-09-22 Chih Kuan Hsieh Fixing Structure for Cylinder
US10286535B2 (en) 2016-03-30 2019-05-14 Caterpillar Inc. Valve body charge lock

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WO2011000595A1 (en) 2011-01-06
US20120187639A1 (en) 2012-07-26
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RU2012103042A (en) 2013-08-10
DE102009027316A1 (en) 2011-01-05

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