EP2104595B1 - Rotary and/or impact hammer - Google Patents

Rotary and/or impact hammer Download PDF

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Publication number
EP2104595B1
EP2104595B1 EP07822043.1A EP07822043A EP2104595B1 EP 2104595 B1 EP2104595 B1 EP 2104595B1 EP 07822043 A EP07822043 A EP 07822043A EP 2104595 B1 EP2104595 B1 EP 2104595B1
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EP
European Patent Office
Prior art keywords
hammer
percussion
drive
drive motor
housing part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07822043.1A
Other languages
German (de)
French (fr)
Other versions
EP2104595A1 (en
Inventor
Rudolf Fuchs
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
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2104595A1 publication Critical patent/EP2104595A1/en
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Publication of EP2104595B1 publication Critical patent/EP2104595B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/12—Means for driving the impulse member comprising a crank mechanism
    • B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
    • 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
    • B25F5/02—Construction of casings, bodies or handles
    • 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
    • B25D2211/003—Crossed drill and motor spindles
    • 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
    • B25D2211/006—Parallel drill and motor spindles
    • 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
    • B25D2250/245—Spatial arrangement of components of the tool relative to each other

Definitions

  • the invention relates to a drilling and / or percussion hammer with an electric drive motor, which is connectable via a transmission with a work spindle and / or an impact mechanism.
  • Such hammer drill are for example from the US 4,431,062 A and the WO 2005/070616 A1 known.
  • Drills and / or impact hammers are usually made in lower weight classes in pistol construction. This is characterized by a parallel course of the motor axis of an electric drive motor with the work spindle, with which a tool, such as a drill, can be coupled.
  • the pistol design is characterized by a relatively large length.
  • Rotary hammers in L-construction as for example from the US 4,431,062 A are known, have over the gun design a shorter length.
  • the L-construction is characterized in that the motor axis of the electric drive motor is at an angle to the work spindle. However, for some applications, the shorter overall length of the L-shaped rotary hammer is still too large.
  • an angle drill head with impact transmission (angle hammer drill head) is used as the attachment.
  • angle hammer drill heads which can be mounted on demand on the hammer drill and in which in addition to the rotation and deflect the striking movement by 90 °.
  • the impact movement of the striking mechanism is transmitted to a firing pin with 45 ° bevel.
  • the transfer requires high skill accuracy and the use of high-quality tool steels due to high friction losses in the sliding bevels.
  • the impact transmission of the angle drill head is associated with low efficiency.
  • the mechanically rigid angular transmission allows only a fixed output angle and thus limits a universal applicability.
  • due to the rigid angular transmission no complete knock decoupling, so a strong manual pressure by the operator in Drilling direction is required. This results in considerable handling disadvantages.
  • the object of the invention is to provide a drill and / or percussion hammer whose overall length can be reduced.
  • the housing of the drilling and / or percussion hammer consists of a drive motor receiving drive housing part and a working spindle and a striking mechanism receiving percussion gear housing part, and that a central axis of a shaft of a transmission forms a pivot axis about which the drive motor to reduce the Length of the drilling and / or percussion hammer is pivotable via a joint between the drive housing part and the striking mechanism housing part.
  • Due to the pivotability of the drive motor is both in a drilling and / or percussion hammer in pistol construction, in which the central axis of the drive shaft of the drive motor is parallel to the work spindle, as well as a drilling and / or hammer in L-type, in which the drive shaft the drive motor extends at an angle to the work spindle, a reduction in the length possible.
  • "Overall length” in this context is the space requirement in the working direction, that is to understand in alignment of the work spindle.
  • the possibility of pivoting the drive motor about the pivot axis with respect to the work spindle and the percussion mechanism results in a stepless angle adjustment within a large angular range.
  • the hammer drill and / or percussion hammer can be a pure hammer drill, a hammer drill for drilling and / or chisel operation (combination hammer) or a pure percussion hammer.
  • the work spindle and impact mechanism are mounted in the percussion gear housing part, the drive motor is mounted in the drive housing part.
  • the transmission is assigned to the drive housing part and the percussion mechanism housing part.
  • the transmission is both part of the first machine unit and part of the second machine unit of the drilling and / or percussion hammer.
  • there are components of the transmission which belong exclusively to the first machine unit, as well as other components that belong exclusively to the second machine unit.
  • working spindle and percussion mechanism have a common axis of movement about which the work spindle rotates and / or along which a striking mass of the impact mechanism moves.
  • a common axis of movement of rotation and impact operation is realized, for example, in a trained as a hammer drill and / or percussion hammer, for example, a reciprocating bat has the impact mass.
  • the movement axis is arranged perpendicular to the pivot axis. Due to the vertical arrangement, the pivot axis is optimally chosen to shorten the overall length.
  • the central axis of the drive shaft is arranged perpendicular to a pivoting plane of the drive motor.
  • the pivot plane is the plane perpendicular to the pivot axis in which the drive motor is pivoted.
  • the drilling and / or percussion hammer according to the invention is designed in L-construction.
  • the central axis of the drive shaft is arranged parallel to a pivot plane of the drive motor. In a parallel arrangement of the central axis of the drive shaft of the drilling and / or percussion hammer is designed in pistol construction.
  • a component, in particular a hammer tube, of the percussion mechanism forms or co-forms the drive spindle.
  • the rotary drive of the tool thus takes place via a component of the striking mechanism.
  • This component is in particular the hammer tube of the striking mechanism.
  • the drilling and / or percussion hammer at least one coupling for selectively connecting the drive motor with the work spindle and / or the striking mechanism. For example, if two separate drive paths for driving the percussion mechanism and the work spindle, each with a coupling designed as a disconnect clutch available, then a rotary and / or beating operation of the drilling and / or percussion hammer can be realized.
  • FIG. 1 shows an inventive, designed as a hammer drill 1 electric hand tool 2 gun-style.
  • the side view of FIG. 1 (top) on the hammer drill 1 shows the first machine unit 3 with a percussion gear housing part 4 and a tool holder 5.
  • the first machine unit 3 is connected to a second machine unit 6 of the hammer drill 1 by a hinge, so that the second machine unit 6 relative to the first machine unit. 3 (or the first machine unit 3 relative to the second machine unit 6) can be pivoted about a pivot axis 8.
  • the second machine unit 6 has a typical for the gun construction handle 9 with operating switch 10 of a drive housing part 11.
  • the striking mechanism housing part 4 and the drive housing part 11 together form the housing 12 of the hammer drill 1 according to the invention FIG.
  • FIG. 2 shows the structure of a transmission 13 for the realization of the hammer drill according to the invention 1.
  • the drive housing part 11 is an only partially shown drive motor with a drive shaft 15.
  • the drive shaft 15 is mounted on a shaft bearing 16 fixed to the housing.
  • the drive shaft 15 drives a on a trained as a crankshaft 17 shaft 18 rotatably mounted ring gear 19 at. Under a ring gear is here and below to understand a ring gear with a conical toothing.
  • the crankshaft 17 is mounted in a designed as a rolling bearing 20 bearing 21 in the drive housing part 11 and the percussion gear housing part 4.
  • crankshaft 17 Another, non-rotatably mounted on the crankshaft 17 fixed ring gear 23 meshes with a ring gear 24 which drives a hammer tube 26 of a percussion mechanism 27 as Hässpindelantriebselement 25 of the drive spindle on the crankshaft 17 for receiving the striking tool housing part.
  • the hammer tube 26 is supported by means of a bearing 28 on the percussion mechanism housing part 4.
  • the rotational movement of the crankshaft 17 also represents the drive for the striking mechanism 27.
  • a cranked arm 29 of the crankshaft 17 converts the rotational movement into a reciprocating movement of a piston 32 of the percussion mechanism 27 with the connecting rod 31 received in a bearing 30.
  • the piston 32 drives in striking mechanism 27 via a non-illustrated air cushion a racket, not shown along a movement axis 33 at.
  • the movement axis 33 is at the same time the axis of rotation of the drive spindle in the hammer drill 1.
  • the central axis 34 of the crankshaft 17 formed as a shaft 18 of the transmission 13 forms the pivot axis 8, by which the drive motor to reduce the overall length of the hammer drill 1 is pivotable.
  • FIG. 3 shows the construction of a hammer drill 1 according to a second embodiment, which substantially the first embodiment of FIG. 2 corresponds, so that only the differences are discussed here.
  • the hammer drill 1 of the second embodiment has an L-type construction.
  • the central axis 35 of the drive shaft 15 is arranged perpendicular to a pivoting plane of the hammer drill 1.
  • the respective drive housing part 2 of the hammer drill 1 according to the embodiments of the Figures 2 and 3 are not shown drive motor and all electrical components of the hammer drill 1 housed.
  • the drive shaft 15 is mounted in a roller bearing 36 and drives via a spur gear 37 designed as a crankshaft 17 shaft 18 at.
  • the bearings 21 each carry one half of the drive housing part 11 and the impact tool housing part 4.
  • a bearing 22 in the drive housing part 11 serves as an abutment for further support of the crankshaft 17.
  • the rotational movement of the drive spindle is initiated and first transferred to the spur gear 40, which is part of an intermediate shaft 41.
  • this intermediate shaft 41 is received.
  • a bevel gear 45 with the fixed to the hammer tube 26 ring gear 24.
  • the drive train of the drive pinion is forwarded to the tool holder 5.
  • the spur gear 38 To generate the impact movement of the percussion mechanism 27 is rotatably on the crankshaft 17 at the front end, the spur gear 38.
  • This spur gear 38 drives via an eccentric to the central axis 34 fixed crank pin 47, the connecting rod 31 at.
  • a low-friction bearing 48 ensures high efficiency in the transmission of the rotational movement.
  • the rotation of the crank pin 47 is transmitted to the piston 32 via the connecting rod 31 rotatably mounted by means of a pin 49.
  • the piston 32 performs in the direction of the movement axis 33, the necessary for the stroke reciprocating motion for driving a racket of the percussion mechanism 27, not shown.
  • the components which are arranged in the impact tool housing part 4 include: For the drill drive, the shaft 41 with spur gear 40, bevel gear 45 and bearings 43, 42, the ring gear 24 with the hammer tube 26 and the other components, not graphically illustrated, for the tool drive; half each of the bearings 21 for the function "panning"; for the impact drive of the piston 32 with the pin 49.
  • the central axis 34 of the crankshaft 17 formed as a shaft 18 is the interface for the rotary actuator.

Description

Die Erfindung betrifft einen Bohr- und/oder Schlaghammer mit einem elektrischen Antriebsmotor, der über ein Getriebe mit einer Arbeitsspindel und/oder einem Schlagwerk verbindbar ist.The invention relates to a drilling and / or percussion hammer with an electric drive motor, which is connectable via a transmission with a work spindle and / or an impact mechanism.

Stand der TechnikState of the art

Derartige Bohrhammer sind beispielsweise aus der US 4,431,062 A und der WO 2005/070616 A1 bekannt.Such hammer drill are for example from the US 4,431,062 A and the WO 2005/070616 A1 known.

Bohr- und/oder Schlaghämmer werden in geringeren Gewichtsklassen meistens in Pistolenbauweise ausgeführt. Diese ist durch einen parallelen Verlauf der Motorachse eines elektrischen Antriebsmotors mit der Arbeitsspindel gekennzeichnet, mit der ein Werkzeug, beispielsweise ein Bohrer, kuppelbar ist. Die Pistolenbauform ist durch eine relativ große Baulänge gekennzeichnet. Bohrhämmer in L-Bauweise, wie sie beispielsweise aus der US 4,431,062 A bekannt sind, besitzen gegenüber der Pistolenbauform eine kürzere Baulänge. Die L-Bauweise ist dadurch ausgezeichnet, dass die Motorachse des elektrischen Antriebsmotors unter einem Winkel zur Arbeitsspindel verläuft. Für einige Anwendungen ist jedoch auch die kürzere Baulänge des Bohrhammers in L-Bauweise noch zu groß. Ist versetzt zur Bohrachse genügend Platz vorhanden, so wird ein Winkelbohrkopf mit Schlagübertragung (Winkel-Hammerbohrkopf) als Vorsatzgerät verwendet. Bekannt sind Winkel-Hammerbohrköpfe, die bei Bedarf auf den Bohrhammer montiert werden können und bei denen neben der Rotation auch die Schlagbewegung um 90° umlenken. Bei dem bekannten Winkel-Hammerbohrkopf wird die Schlagbewegung des Schlagwerks auf einen Schlagbolzen mit 45°-Schräge übertragen. Die Übertragung erfordert wegen hoher Reibungsverluste bei den aufeinandergleitenden Schrägen eine hohe Fertigkeitsgenauigkeit und den Einsatz von hochwertigen Werkzeugstählen. Wegen der hohen Erwärmung im Betrieb ist die Schlagübertragung des Winkelbohrkopfs mit einem geringen Wirkungsgrad verbunden. Weiterhin lässt die mechanisch starre Winkelübertragung nur einen festen Abtriebswinkel zu und schränkt damit eine universelle Anwendbarkeit ein. Außerdem entsteht durch die starre Winkelübertragung keine vollständige Schlagentkopplung, sodass ein starker manueller Andruck vom Bediener in Bohrrichtung erforderlich wird. Damit ergeben sich erhebliche Handhabungsnachteile.Drills and / or impact hammers are usually made in lower weight classes in pistol construction. This is characterized by a parallel course of the motor axis of an electric drive motor with the work spindle, with which a tool, such as a drill, can be coupled. The pistol design is characterized by a relatively large length. Rotary hammers in L-construction, as for example from the US 4,431,062 A are known, have over the gun design a shorter length. The L-construction is characterized in that the motor axis of the electric drive motor is at an angle to the work spindle. However, for some applications, the shorter overall length of the L-shaped rotary hammer is still too large. If sufficient space is available offset to the drilling axis, an angle drill head with impact transmission (angle hammer drill head) is used as the attachment. Known are angle hammer drill heads, which can be mounted on demand on the hammer drill and in which in addition to the rotation and deflect the striking movement by 90 °. In the known angle hammer drill head, the impact movement of the striking mechanism is transmitted to a firing pin with 45 ° bevel. The transfer requires high skill accuracy and the use of high-quality tool steels due to high friction losses in the sliding bevels. Because of the high heating during operation, the impact transmission of the angle drill head is associated with low efficiency. Furthermore, the mechanically rigid angular transmission allows only a fixed output angle and thus limits a universal applicability. In addition, due to the rigid angular transmission no complete knock decoupling, so a strong manual pressure by the operator in Drilling direction is required. This results in considerable handling disadvantages.

Offenbarung der ErfindungDisclosure of the invention

Aufgabe der Erfindung ist es, einen Bohr- und/oder Schlaghammer bereitzustellen, dessen Baulänge verringert werden kann. Dazu ist vorgesehen, dass das Gehäuse des Bohr- und/oder Schlaghammer aus einem einen Antriebsmotor aufnehmenden Antriebsgehäuseteil und einem eine Arbeitsspindel und ein Schlagwerk aufnehmenden Schlagwerkgehäuseteil besteht, und dass eine Mittelachse einer Welle eines Getriebes eine Schwenkachse bildet, um die der Antriebsmotor zur Verringerung der Baulänge des Bohr- und/oder Schlaghammers über ein Gelenk zwischen dem Antriebsgehäuseteil und dem Schlagwerkgehäuseteil verschwenkbar ist. Durch die Verschwenkbarkeit des Antriebsmotors ist sowohl bei einer Bohr- und/oder Schlaghammer in Pistolenbauweise, bei dem die Mittelachse der Antriebswelle des Antriebsmotors parallel zur Arbeitsspindel verläuft, als auch bei einem Bohr- und/oder Schlaghammer in L-Bauweise, bei dem die Antriebswelle des Antriebsmotors unter einem Winkel zur Arbeitsspindel verläuft, eine Verringerung der Baulänge möglich. Unter "Baulänge" ist in diesem Zusammenhang der Platzbedarf in Arbeitsrichtung, das heißt in Ausrichtung der Arbeitsspindel zu verstehen. Durch die Möglichkeit, den Antriebsmotor um die Schwenkachse gegenüber der Arbeitsspindel und dem Schlagwerk zu verschwenken, ergibt sich eine stufenlose Winkeleinstellung innerhalb eines großen Winkelbereichs. Trotz des Verschwenkens um die Schwenkachse, kann ein Schlag- oder Schlagbohrbetrieb ohne Schlagenergieverluste aufgrund der Schlagrichtungsänderung erfolgen. Durch das Verschwenken kann eine derart geringe Baulänge realisiert werden, dass eine Zugänglichkeit zu sehr engen Stellen ermöglicht ist. Das Gerät ist sofort einsatzbereit, da keine zusätzlichen Teile montiert werden müssen. Ein weiterer Vorteil des erfindungsgemäßen Bohr- und/oder Schlaghammer ist ein kleines Eckenmaß, da das Eckenmaß weitgehend unabhängig vom Durchmesser des Antriebsmotors ist. Vorzugsweise kann es sich bei dem Bohr- und/oder Schlaghammer um einen reinen Bohrhammer, einen Bohrhammer für Bohr- und/oder Meißelbetrieb (Kombihammer) oder einen reinen Schlaghammer handeln.The object of the invention is to provide a drill and / or percussion hammer whose overall length can be reduced. For this purpose, it is provided that the housing of the drilling and / or percussion hammer consists of a drive motor receiving drive housing part and a working spindle and a striking mechanism receiving percussion gear housing part, and that a central axis of a shaft of a transmission forms a pivot axis about which the drive motor to reduce the Length of the drilling and / or percussion hammer is pivotable via a joint between the drive housing part and the striking mechanism housing part. Due to the pivotability of the drive motor is both in a drilling and / or percussion hammer in pistol construction, in which the central axis of the drive shaft of the drive motor is parallel to the work spindle, as well as a drilling and / or hammer in L-type, in which the drive shaft the drive motor extends at an angle to the work spindle, a reduction in the length possible. "Overall length" in this context is the space requirement in the working direction, that is to understand in alignment of the work spindle. The possibility of pivoting the drive motor about the pivot axis with respect to the work spindle and the percussion mechanism, results in a stepless angle adjustment within a large angular range. Despite pivoting about the pivot axis, impact or percussion drilling operation without impact energy losses due to the impact direction change may occur. By pivoting such a small overall length can be realized that accessibility to very tight locations is possible. The device is ready to use as no additional parts need to be mounted. Another advantage of the drilling and / or percussion hammer according to the invention is a small corner measure, since the corner dimension is largely independent of the diameter of the drive motor. Preferably, the hammer drill and / or percussion hammer can be a pure hammer drill, a hammer drill for drilling and / or chisel operation (combination hammer) or a pure percussion hammer.

Die Arbeitsspindel und das Schlagwerk sind im Schlagwerksgehäuseteil befestigt, der Antriebsmotor ist im Antriebsgehäuseteil befestigt. Somit ergibt sich eine erste Maschineneinheit des Bohr- und/oder Schlaghammers, die das Schlagwerksgehäuseteil, das Schlagwerk und die Spindel aufweist, sowie eine zweite Maschineneinheit des Bohr- und/oder Schlaghammers, die das Antriebsgehäuseteil und den Antriebsmotor aufweist. Mit Vorteil ist vorgesehen, dass das Getriebe dem Antriebsgehäuseteil und dem Schlagwerksgehäuseteil zugeordnet ist. Damit ist das Getriebe sowohl Teil der ersten Maschineneinheit als auch Teil der zweiten Maschineneinheit des Bohr- und/oder Schlaghammers. Dabei gibt es insbesondere Komponenten des Getriebes, die ausschließlich der ersten Maschineneinheit angehören, als auch anderen Komponenten, die ausschließlich der zweiten Maschineneinheit angehören.The work spindle and impact mechanism are mounted in the percussion gear housing part, the drive motor is mounted in the drive housing part. This results in a first machine unit of the drilling and / or percussion hammer, which has the percussion gear housing part, the striking mechanism and the spindle, as well as a second machine unit of the rotary and / or percussion hammer, which has the drive housing part and the drive motor. It is advantageously provided that the transmission is assigned to the drive housing part and the percussion mechanism housing part. Thus, the transmission is both part of the first machine unit and part of the second machine unit of the drilling and / or percussion hammer. In particular, there are components of the transmission, which belong exclusively to the first machine unit, as well as other components that belong exclusively to the second machine unit.

Insbesondere ist vorgesehen, dass Arbeitsspindel und Schlagwerk eine gemeinsame Bewegungsachse aufweisen, um die sich die Arbeitsspindel dreht und/oder entlang der sich eine Schlagmasse des Schlagwerks bewegt. Eine gemeinsame Bewegungsachse von Rotations- und Schlagbetrieb ist zum Beispiel bei einem als Bohrhammer ausgebildeten Bohr- und/oder Schlaghammer realisiert, wobei zum Beispiel ein hin- und herbewegter Schläger die Schlagmasse aufweist.In particular, it is provided that working spindle and percussion mechanism have a common axis of movement about which the work spindle rotates and / or along which a striking mass of the impact mechanism moves. A common axis of movement of rotation and impact operation is realized, for example, in a trained as a hammer drill and / or percussion hammer, for example, a reciprocating bat has the impact mass.

Mit Vorteil ist vorgesehen, dass die Bewegungsachse senkrecht zur Schwenkachse angeordnet ist. Durch die senkrechte Anordnung ist die Schwenkachse zur Verkürzung der Baulänge optimal gewählt.It is advantageously provided that the movement axis is arranged perpendicular to the pivot axis. Due to the vertical arrangement, the pivot axis is optimally chosen to shorten the overall length.

Nach einer Weiterbildung der Erfindung ist vorgesehen, dass die Mittelachse der Antriebswelle senkrecht auf einer Verschwenkebene des Antriebsmotors angeordnet ist. Die Verschwenkebene ist die Ebene senkrecht zur Schwenkachse, in der der Antriebsmotor verschwenkt wird. Bei dieser Ausführungsform ist der erfindungsgemäße Bohr- und/oder Schlaghammer in L-Bauweise ausgebildet. Alternativ ist vorgesehen, dass die Mittelachse der Antriebswelle parallel zu einer Verschwenkebene des Antriebsmotors angeordnet ist. Bei einer parallelen Anordnung der Mittelachse der Antriebswelle ist der Bohr- und/oder Schlaghammer in Pistolenbauweise ausgebildet.According to a development of the invention it is provided that the central axis of the drive shaft is arranged perpendicular to a pivoting plane of the drive motor. The pivot plane is the plane perpendicular to the pivot axis in which the drive motor is pivoted. In this embodiment, the drilling and / or percussion hammer according to the invention is designed in L-construction. Alternatively, it is provided that the central axis of the drive shaft is arranged parallel to a pivot plane of the drive motor. In a parallel arrangement of the central axis of the drive shaft of the drilling and / or percussion hammer is designed in pistol construction.

Weiterhin ist vorgesehen, dass ein Bauteil, insbesondere ein Hammerrohr, des Schlagwerks die Antriebsspindel bildet oder mitbildet. Der Drehantrieb des Werkzeugs erfolgt somit über ein Bauteil des Schlagwerks. Dieses Bauteil ist insbesondere das Hammerrohr des Schlagwerks.Furthermore, it is provided that a component, in particular a hammer tube, of the percussion mechanism forms or co-forms the drive spindle. The rotary drive of the tool thus takes place via a component of the striking mechanism. This component is in particular the hammer tube of the striking mechanism.

Mit Vorteil ist vorgesehen, dass der Bohr- und/oder Schlaghammer mindestens eine Kupplung zum wahlweise Verbinden des Antriebsmotors mit der Arbeitsspindel und/oder dem Schlagwerk aufweist. Sind zum Beispiel zwei separate Antriebspfade zum Antrieb des Schlagwerks und der Arbeitsspindel mit jeweils einer als Trennkupplung ausgebildeten Kupplung vorhanden, so kann wahlweise ein drehender und/oder schlagender Betrieb der Bohr- und/oder Schlaghammer realisiert werden.It is advantageously provided that the drilling and / or percussion hammer at least one coupling for selectively connecting the drive motor with the work spindle and / or the striking mechanism. For example, if two separate drive paths for driving the percussion mechanism and the work spindle, each with a coupling designed as a disconnect clutch available, then a rotary and / or beating operation of the drilling and / or percussion hammer can be realized.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Die Erfindung wird nachfolgend anhand von Zeichnungen näher erläutert. Es zeigen:

Figur 1
einen erfindungsgemäße Bohr- und/oder Schlaghammer in Pistolenbauweise,
Figur 2
eine Detailansicht eines erfindungsgemäßen Bohr- und/oder Schlaghammers im Bereich des Getriebes nach einem ersten Ausführungsbeispiel und
Figur 3
eine Detailansicht eines erfindungsgemäßen Bohr- und/oder Schlaghammers im Bereich des Getriebes nach einem zweiten Ausführungsbeispiel.
The invention will be explained in more detail with reference to drawings. Show it:
FIG. 1
a gun-type hammer drill and / or percussion hammer according to the invention,
FIG. 2
a detailed view of a drilling and / or percussion hammer according to the invention in the field of transmission according to a first embodiment and
FIG. 3
a detailed view of a drilling and / or percussion hammer according to the invention in the region of the transmission according to a second embodiment.

Ausführungsform(en) der ErfindungEmbodiment (s) of the invention

Die Figur 1 zeigt eine erfindungsgemäße, als Bohrhammer 1 ausgebildete Elektrohandwerkzeugmaschine 2 in Pistolenbauweise. Die Seitenansicht der Figur 1 (oben) auf den Bohrhammer 1 zeigt die erste Maschineneinheit 3 mit einem Schlagwerksgehäuseteil 4 und einer Werkzeugaufnahme 5. Die erste Maschineneinheit 3 ist mit einer zweiten Maschineneinheit 6 des Bohrhammers 1. durch ein Gelenk verbunden, sodass die zweite Maschineneinheit 6 gegenüber der ersten Maschineneinheit 3 (beziehungsweise die erste Maschineneinheit 3 gegenüber der zweiten Maschineneinheit 6) um eine Schwenkachse 8 verschwenkt werden kann. Die zweite Maschineneinheit 6 weist ein für die Pistolenbauweise typisches Griffstück 9 mit Betätigungsschalter 10 eines Antriebsgehäuseteils 11 auf. Das Schlagwerksgehäuseteil 4 und das Antriebsgehäuseteil 11 bilden zusammen das Gehäuse 12 des erfindungsgemäßen Bohrhammers 1. In der Draufsicht der Figur 1 (unten) ist das Verschwenken der beiden Maschineneinheiten 3, 6 gezeigt. Neben einer Grundanordnung mit der Baulänge L, die einem Aufbau bei einem herkömmlichen Bohrhammer 1 entspricht, ist ein gegenüber der zweiten Maschineneinheit 6 um einen Winkel von 90° verschwenkte erste Maschineneinheit 3 gezeigt, wodurch sich eine verkürzte Baulänge L' ergibt.The FIG. 1 shows an inventive, designed as a hammer drill 1 electric hand tool 2 gun-style. The side view of FIG. 1 (top) on the hammer drill 1 shows the first machine unit 3 with a percussion gear housing part 4 and a tool holder 5. The first machine unit 3 is connected to a second machine unit 6 of the hammer drill 1 by a hinge, so that the second machine unit 6 relative to the first machine unit. 3 (or the first machine unit 3 relative to the second machine unit 6) can be pivoted about a pivot axis 8. The second machine unit 6 has a typical for the gun construction handle 9 with operating switch 10 of a drive housing part 11. The striking mechanism housing part 4 and the drive housing part 11 together form the housing 12 of the hammer drill 1 according to the invention FIG. 1 (bottom), the pivoting of the two machine units 3, 6 is shown. In addition to a basic arrangement with the length L, which corresponds to a structure in a conventional hammer drill 1, one is opposite to the second Machine unit 6 by an angle of 90 ° pivoted first machine unit 3, resulting in a shortened length L 'results.

Die Figur 2 zeigt den Aufbau eines Getriebes 13 zur Realisierung des erfindungsgemäßen Bohrhammers 1. In dem Antriebsgehäuseteil 11 befindet sich ein nur teilweise dargestellter Antriebsmotor mit einer Antriebswelle 15. Die Antriebswelle 15 ist über ein Wellenlager 16 gehäusefest gelagert. Die Antriebswelle 15 treibt ein auf einer als Kurbelwelle 17 ausgebildete Welle 18 drehfest befestigtes Tellerrad 19 an. Unter einem Tellerrad ist hier und im Folgenden ein Tellerrad mit einer Kegelverzahnung zu verstehen. Die Kurbelwelle 17 ist in einem als Wälzlager 20 ausgebildeten Lager 21 im Antriebsgehäuseteil 11 und im Schlagwerksgehäuseteil 4 gelagert. Auf der Kurbelwelle 17 befindet sich zwecks Aufnahme des Schlagwerkzeugsgehäuseteils 4 ein weiteres Lager 22. Ein weiteres, drehfest auf der Kurbelwelle 17 befestigtes Tellerrad 23 kämmt mit einem Tellerrad 24, das als Arbeitsspindelantriebselement 25 der Antriebsspindel ein Hammerrohr 26 eines Schlagwerks 27 antreibt. Das Hammerrohr 26 stützt sich mittels eines Lagers 28 am Schlagwerksgehäuseteil 4 ab. Die Drehbewegung der Kurbelwelle 17 stellt auch den Antrieb für das Schlagwerk 27 dar. Ein abgekröpfter Arm 29 der Kurbelwelle 17 wandelt mit dem in einem Lager 30 aufgenommenen Pleuel 31 die Drehbewegung in eine Hin- und Herbewegung eines Kolbens 32 des Schlagwerks 27 um. Der Kolben 32 treibt im Schlagwerk 27 über ein nicht dargestelltes Luftpolster einen nicht dargestellten Schläger entlang einer Bewegungsachse 33 an. Die Bewegungsachse 33 ist bei dem Bohrhammer 1 gleichzeitig die Drehachse der Antriebsspindel. Die Mittelachse 34 der als Kurbelwelle 17 ausgebildeten Welle 18 des Getriebes 13 bildet die Schwenkachse 8, um die der Antriebsmotor zur Verringerung der Baulänge des Bohrhammers 1 verschwenkbar ist.The FIG. 2 shows the structure of a transmission 13 for the realization of the hammer drill according to the invention 1. In the drive housing part 11 is an only partially shown drive motor with a drive shaft 15. The drive shaft 15 is mounted on a shaft bearing 16 fixed to the housing. The drive shaft 15 drives a on a trained as a crankshaft 17 shaft 18 rotatably mounted ring gear 19 at. Under a ring gear is here and below to understand a ring gear with a conical toothing. The crankshaft 17 is mounted in a designed as a rolling bearing 20 bearing 21 in the drive housing part 11 and the percussion gear housing part 4. Another, non-rotatably mounted on the crankshaft 17 fixed ring gear 23 meshes with a ring gear 24 which drives a hammer tube 26 of a percussion mechanism 27 as Arbeitssspindelantriebselement 25 of the drive spindle on the crankshaft 17 for receiving the striking tool housing part. The hammer tube 26 is supported by means of a bearing 28 on the percussion mechanism housing part 4. The rotational movement of the crankshaft 17 also represents the drive for the striking mechanism 27. A cranked arm 29 of the crankshaft 17 converts the rotational movement into a reciprocating movement of a piston 32 of the percussion mechanism 27 with the connecting rod 31 received in a bearing 30. The piston 32 drives in striking mechanism 27 via a non-illustrated air cushion a racket, not shown along a movement axis 33 at. The movement axis 33 is at the same time the axis of rotation of the drive spindle in the hammer drill 1. The central axis 34 of the crankshaft 17 formed as a shaft 18 of the transmission 13 forms the pivot axis 8, by which the drive motor to reduce the overall length of the hammer drill 1 is pivotable.

Die Figur 3 zeigt den Aufbau eines Bohrhammers 1 nach einem zweiten Ausführungsbeispiel, das im Wesentlichen dem ersten Ausführungsbeispiel der Figur 2 entspricht, so dass hier nur auf die Unterschiede eingegangen wird. Der Bohrhammer 1 des zweiten Ausführungsbeispiels weist eine L-Bauweise auf. Dabei ist die Mittelachse 35 der Antriebswelle 15 senkrecht zu einer Verschwenkebene des Bohrhammers 1 angeordnet. Im jeweiligen Antriebsgehäuseteil 2 des Bohrhammers 1 gemäß der Ausführungsbeispiele der Figuren 2 und 3 sind der nicht dargestellte Antriebsmotor und sämtliche elektrische Bauteile des Bohrhammers 1 untergebracht. Die Antriebswelle 15 ist in einem Wälzlager 36 gelagert und treibt über ein Stirnrad 37 die als Kurbelwelle 17 ausgebildete Welle 18 an. Zur Ausführung der Schwenkbewegung der zweiten Maschineneinheit 6 gegenüber der ersten Maschineneinheit 3 tragen die Lager 21 je zur einen Hälfte den Antriebsgehäuseteil 11 und den Schlagwerkzeugsgehäuseteil 4. Ein Lager 22 im Antriebsgehäuseteil 11 dient als Gegenlager zur weiteren Abstützung der Kurbelwelle 17. Über ein fest mit der Kurbelwelle 17 verbundenes Stirnrad 39 wird die Drehbewegung der Antriebsspindel eingeleitet und zunächst auf das Stirnrad 40 übertragen, das Bestandteil einer Zwischenwelle 41 ist. In Lagern 42, 43 wird diese Zwischenwelle 41 aufgenommen. An dessen vorderem Ende 44 kämmt ein Kegelrad 45 mit dem am Hammerrohr 26 befestigten Tellerrad 24. Über das fest mit dem Tellerrad 24 verbundene Hammerrohr 26, das in einem Lager 28 gelagert ist, wird der Antriebsstrang des Antriebsritzels zur Werkzeugaufnahme 5 weitergeleitet. Zur Erzeugung der Schlagbewegung des Schlagwerks 27 befindet sich drehfest auf der Kurbelwelle 17 am stirnseitigen Ende das Stirnrad 38. Dieses Stirnrad 38 treibt über einen exzentrisch zur Mittelachse 34 befestigten Kurbelzapfen 47 das Pleuel 31 an. Eine reibungsarme Lagerung 48 sorgt für einen hohen Wirkungsgrad bei der Übertragung der Drehbewegung. Die Rotation des Kurbelzapfens 47 wird über den mittels eines Stifts 49 drehbar gelagerten Pleuel 31 auf den Kolben 32 übertragen. Der Kolben 32 führt in Richtung der Bewegungsachse 33 die für den Schlag notwendige Hin- und Herbewegung zum Antrieb eines nicht dargestellten Schlägers des Schlagwerks 27 aus. Zu den Bauteilen, die im Schlagwerkzeugsgehäuseteil 4 angeordnet sind, gehören: Für den Bohrantrieb die Welle 41 mit Stirnrad 40, Kegelrad 45 und Lager 43, 42, das Tellerrad 24 mit dem Hammerrohr 26 und den sonstigen zeichnerisch nicht dargestellten Bauteilen für den Werkzeugantrieb; je hälftig die Lager 21 für die Funktion "Schwenken"; für den Schlagantrieb der Kolben 32 mit dem Stift 49. Die Mittelachse 34 der als Kurbelwelle 17 ausgebildeten Welle 18 stellt die Schnittstelle für den Schwenkantrieb dar.The FIG. 3 shows the construction of a hammer drill 1 according to a second embodiment, which substantially the first embodiment of FIG. 2 corresponds, so that only the differences are discussed here. The hammer drill 1 of the second embodiment has an L-type construction. In this case, the central axis 35 of the drive shaft 15 is arranged perpendicular to a pivoting plane of the hammer drill 1. In the respective drive housing part 2 of the hammer drill 1 according to the embodiments of the Figures 2 and 3 are not shown drive motor and all electrical components of the hammer drill 1 housed. The drive shaft 15 is mounted in a roller bearing 36 and drives via a spur gear 37 designed as a crankshaft 17 shaft 18 at. For carrying out the pivoting movement of the second machine unit 6 with respect to the first Machine unit 3, the bearings 21 each carry one half of the drive housing part 11 and the impact tool housing part 4. A bearing 22 in the drive housing part 11 serves as an abutment for further support of the crankshaft 17. About a fixedly connected to the crankshaft 17 spur gear 39, the rotational movement of the drive spindle is initiated and first transferred to the spur gear 40, which is part of an intermediate shaft 41. In bearings 42, 43, this intermediate shaft 41 is received. At the front end 44 meshes a bevel gear 45 with the fixed to the hammer tube 26 ring gear 24. About the firmly connected to the ring gear 24 hammer tube 26 which is mounted in a bearing 28, the drive train of the drive pinion is forwarded to the tool holder 5. To generate the impact movement of the percussion mechanism 27 is rotatably on the crankshaft 17 at the front end, the spur gear 38. This spur gear 38 drives via an eccentric to the central axis 34 fixed crank pin 47, the connecting rod 31 at. A low-friction bearing 48 ensures high efficiency in the transmission of the rotational movement. The rotation of the crank pin 47 is transmitted to the piston 32 via the connecting rod 31 rotatably mounted by means of a pin 49. The piston 32 performs in the direction of the movement axis 33, the necessary for the stroke reciprocating motion for driving a racket of the percussion mechanism 27, not shown. The components which are arranged in the impact tool housing part 4 include: For the drill drive, the shaft 41 with spur gear 40, bevel gear 45 and bearings 43, 42, the ring gear 24 with the hammer tube 26 and the other components, not graphically illustrated, for the tool drive; half each of the bearings 21 for the function "panning"; for the impact drive of the piston 32 with the pin 49. The central axis 34 of the crankshaft 17 formed as a shaft 18 is the interface for the rotary actuator.

In beiden Ausführungsbeispielen (Figuren 2 und 3) sind Kupplungen zum wahlweisen Antrieb der Arbeitsspindel beziehungsweise des Hammerrohrs 26 und/oder des Kolbens 32 des Schlagwerks 27 nicht eingezeichnet. Ist der Bohrhammer 1 zum Beispiel als umschaltbarer Bohrhammer mit Bohr- und/oder Hammerfunktion ausgebildet, so sind entsprechend schaltbare Kupplungen vorhanden.In both embodiments ( Figures 2 and 3 ) are clutches for selectively driving the work spindle or the hammer tube 26 and / or the piston 32 of the impact mechanism 27 is not shown. If the hammer drill 1, for example, designed as a reversible hammer drill with drilling and / or hammer function, so switchable couplings are available.

Claims (8)

  1. Hammer drill and/or percussion hammer (1) having a housing (12) and having an electric drive motor which is able to be connected to a working spindle and/or a percussion mechanism (27) via a transmission (13), characterized in that the housing (12) consists of a drive housing part (11) accommodating the drive motor and of a percussion mechanism housing part (4) accommodating the working spindle and the percussion mechanism (27), and in that a central axis (34) of a shaft (18) of the transmission (13) forms a pivot axis (8) about which the drive motor is pivotable in order to reduce the overall length (L) of the hammer drill and/or percussion hammer (1) via a joint (7) between the drive housing part (11) and the percussion mechanism housing part (4).
  2. Hammer drill and/or percussion hammer (1) according to Claim 1, characterized in that the transmission (13) is assigned to the drive housing part (11) and to the percussion mechanism housing part (4).
  3. Hammer drill and/or percussion hammer (1) according to one of the preceding claims, characterized in that the working spindle and percussion mechanism (27) have a common movement axis (33) about which the working spindle rotates and/or along which a percussion mass of the percussion mechanism (27) moves.
  4. Hammer drill and/or percussion hammer (1) according to one of the preceding claims, characterized in that the movement axis (33) is arranged perpendicularly to the pivot axis (8).
  5. Hammer drill and/or percussion hammer (1) according to one of the preceding claims, characterized in that a central axis (35) of a drive shaft (15) of the drive motor is arranged perpendicularly to a pivot plane of the drive motor.
  6. Hammer drill and/or percussion hammer (1) according to one of the preceding Claims 1 to 4, characterized in that a central axis (35) of a drive shaft (15) of the drive motor is arranged parallel to a pivot plane of the drive motor.
  7. Hammer drill and/or percussion hammer (1) according to one of the preceding claims, characterized in that a component, in particular a hammer tube (26), of the percussion mechanism (27) forms or conjointly forms the working spindle.
  8. Hammer drill and/or percussion hammer (1) according to one of the preceding claims, characterized by at least one clutch for selectively connecting the drive motor to the working spindle and/or to the percussion mechanism (27).
EP07822043.1A 2006-12-27 2007-10-30 Rotary and/or impact hammer Not-in-force EP2104595B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006061625A DE102006061625A1 (en) 2006-12-27 2006-12-27 Electric hand tool e.g. drill hammer, has motor connectable with spindle and/or sliding tool over transmission and pivotable around axis, where middle axle of shaft of transmission or central axle of drive shaft forms axis
PCT/EP2007/061689 WO2008080664A1 (en) 2006-12-27 2007-10-30 Electric hand power tool

Publications (2)

Publication Number Publication Date
EP2104595A1 EP2104595A1 (en) 2009-09-30
EP2104595B1 true EP2104595B1 (en) 2017-01-25

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EP07822043.1A Not-in-force EP2104595B1 (en) 2006-12-27 2007-10-30 Rotary and/or impact hammer

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US (1) US8261850B2 (en)
EP (1) EP2104595B1 (en)
CN (1) CN101568410B (en)
DE (1) DE102006061625A1 (en)
RU (1) RU2455144C2 (en)
WO (1) WO2008080664A1 (en)

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Also Published As

Publication number Publication date
WO2008080664A1 (en) 2008-07-10
DE102006061625A1 (en) 2008-07-03
CN101568410A (en) 2009-10-28
EP2104595A1 (en) 2009-09-30
RU2009128742A (en) 2011-02-10
US8261850B2 (en) 2012-09-11
CN101568410B (en) 2014-12-10
RU2455144C2 (en) 2012-07-10
US20110000693A1 (en) 2011-01-06

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