EP2674257B1 - Impact mechanism - Google Patents

Impact mechanism Download PDF

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Publication number
EP2674257B1
EP2674257B1 EP13163651.6A EP13163651A EP2674257B1 EP 2674257 B1 EP2674257 B1 EP 2674257B1 EP 13163651 A EP13163651 A EP 13163651A EP 2674257 B1 EP2674257 B1 EP 2674257B1
Authority
EP
European Patent Office
Prior art keywords
impact
percussion
firing pin
driver element
damping element
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
EP13163651.6A
Other languages
German (de)
French (fr)
Other versions
EP2674257A1 (en
Inventor
Immanuel Werner
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 EP2674257A1 publication Critical patent/EP2674257A1/en
Application granted granted Critical
Publication of EP2674257B1 publication Critical patent/EP2674257B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B25D11/005—Arrangements for adjusting the stroke of the impulse member or for stopping the impact action when the tool is lifted from the working surface
    • 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
    • B25D17/24—Damping the reaction force
    • 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
    • B25D2217/0015—Anvils
    • 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
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • B25D2222/57—Elastomers, e.g. rubber
    • 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
    • B25D2250/035—Bleeding holes, e.g. in piston 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
    • B25D2250/131—Idling mode of tools
    • 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
    • B25D2250/371—Use of springs

Definitions

  • the invention relates to an impact mechanism, in particular for a drill and / or percussion hammer, according to claim 1, with a firing pin and with at least one driver element for transmitting a firing pin position.
  • the at least one driver element is coupled with the firing pin parallel to a direction of impact in and against the direction of impact.
  • a "hammer drill and / or percussion hammer” is to be understood as meaning, in particular, a hand tool machine which is provided for machining a workpiece with a rotating or non-rotating tool, the tool being able to be acted upon by the hand tool machine with impact pulses.
  • a "hand tool machine” should be understood to mean a machine tool which is intended to be manually guided by a user for machining a workpiece.
  • a "percussion mechanism” is to be understood in this context, in particular a device which has at least one component which is provided for generating and / or transmitting a shock pulse, in particular an axial impact pulse in the direction of impact, on a firing pin.
  • Such a component may in particular be a racket, a guide element, in particular a hammer tube and / or a piston, such as, in particular, a pot piston, and / or another component which appears expedient to the person skilled in the art.
  • a "hammer tube” is to be understood as meaning, in particular, a preferably tubular component in which the firing pin and / or the racket and / or the piston are guided.
  • a “piston” is to be understood in this context in particular a cyclically driven in and against the direction of impact, run in the hammer tube component, which is intended to cyclically move the racket by pressurizing a space enclosed by the racket and piston in the hammer tube.
  • the racket can also be moved by a cyclic pressurization of at least one of the racket limited space in the hammer tube by an external, arranged outside the hammer tube pressure source.
  • the bat is cyclically moved in a hammering operation in the hammer tube in and against the direction of impact and exerts impact pulses on the firing pin.
  • the firing pin transmits the impact pulses to the tool.
  • the tool is preferably clamped in a tool holder.
  • the firing pin against the direction of impact can preferably be displaced against a spring force from an idle position to an impact position.
  • a "striking position” is to be understood as meaning, in particular, a firing pin position in which the impact mechanism is provided for impact operation.
  • impact operation is to be understood as meaning, in particular, an operating state of the percussion mechanism in which the percussion mechanism exerts impact pulses on the tool which are provided for machining a workpiece.
  • An impact strength of the impact pulses can be determined by a design of the striking mechanism and / or determined by the user and / or a control unit of the impact mechanism.
  • an “idle position” is to be understood in this context, in particular a firing pin position in which the hammer mechanism is provided for idling operation.
  • an “idling operation” is to be understood as meaning, in particular, an operating state of the impact mechanism in which the percussion mechanism produces no or only small impact pulses on the tool exercises, in particular impact pulses which have less than 50%, preferably less than 25%, more preferably less than 10% of the impact strength of the impact pulses in impact mode.
  • the displacement of the firing pin in the idle position and the impact position is limited by a stop.
  • the firing pin is displaced from the idle position to the hitting position by the user pressing the tool against the workpiece to be machined.
  • the tool and / or the tool holder is preferably movably mounted on the drilling and / or percussion hammer in the direction of impact.
  • the tool and / or the tool holder are supported against the impact direction on the firing pin and move it when a minimum contact force against the spring force from the idle position to the impact position is exceeded. If the tool is set off from the workpiece, the firing pin and the tool and / or the tool holder can be moved by the spring force back to the idle position.
  • the at least one driver element is provided to transmit the firing pin position for switching the percussion mechanism from idle mode to percussion mode and vice versa.
  • the driving element is mounted without play on the firing pin in a ready-mounted state in the percussion in the direction of impact.
  • play-free is to be understood in particular as meaning that relative movements of the driver element to the firing pin in the impact direction are limited to less than 1 mm, preferably less than 0.5 mm, particularly preferably less than 0.1 mm, due to the bearing of the driver element on the firing pin.
  • the driver element may be provided to transmit forces in and against the direction of impact on the firing pin. The firing pin position can be transferred very reliably. It can be saved components, in particular a arranged between the firing pin and driver element transmission member such as a stop bushing.
  • Storage areas for a stop bushing on the firing pin can be omitted.
  • a production of the firing pin, in particular an outer contour of the firing pin, can be simplified.
  • a mass of the firing pin can be particularly large.
  • the firing pin can pass on particularly high impact pulses.
  • the firing pin position can be passed through the at least one driver element in the direction of impact and against the direction of impact. Forces can from the firing pin on the driver element in the direction of impact and be passed against the direction of impact.
  • the firing pin can be supported in and against the direction of impact by the driver element.
  • the at least one driver element is provided to transmit the firing pin position to a control sleeve and a spacer sleeve.
  • a "control sleeve” is to be understood in this context in particular a surrounding the hammer tube component, which is intended to switch the percussion between idle mode and impact mode.
  • the control sleeve may be provided to release in the idle position idling openings, which vent the space adjacent to the racket, which is provided for pressurizing the racket vent.
  • the pressurization of the racket can be at least reduced in idle mode and a racket movement at least reduced.
  • the idling openings are preferably arranged in the hammer tube.
  • the idling openings are arranged in the hammer tube on the side facing away from the impact direction of the racket.
  • the control sleeve is provided to cover the idle openings in the impact position and at least substantially close.
  • at least substantially should be understood in this context in particular a reduction of the flow cross-section by more than 90%, preferably more than 95%, particularly preferably more than 99%.
  • the firing pin position can be effectively used to switch the percussion between idling and impact mode.
  • a "spacer sleeve” is to be understood as meaning, in particular, a component arranged in the direction of impact in front of the control sleeve, which component is intended to transmit the firing pin position from the driver element to the control sleeve.
  • the spacer sleeve can communicate with the control sleeve directly or preferably indirectly via other components.
  • pressure sleeve and control sleeve at least substantially only compressive forces can be transmitted and / or at the Power transmission take place a damping.
  • the control sleeve can be effectively protected against overload and / or damage caused by the firing pin forces.
  • a damping element is arranged in the direction of impact in front of the driver element, which is intended to damp a kickback of the firing pin.
  • a "kickback" of the firing pin is to be understood in particular a rebound of the firing pin from the tool.
  • the recoil occurs after the firing pin has given off a part of its energy to the tool and rebounds from a blow to the tool.
  • the firing pin can now move counter to the direction of impact until the next impact pulse exerted on the firing pin by the bat.
  • This movement of the firing pin against the direction of impact is transmitted by the driver element.
  • the arranged in the direction of impact behind the driver element damping element can dampen the setback effectively.
  • the damping element can reduce a transmission of the kickback on the control sleeve and / or other components of the striking mechanism. Vibrations can be reduced. An ease of use can be increased. Noise emissions can be reduced.
  • the damping element may preferably be made at least partially of an elastomeric material.
  • the damping element for damping the backlash between the spacer sleeve and the control sleeve is arranged.
  • the damping element is designed as an annular component between the spacer sleeve and the control sleeve.
  • the damping element surrounds the hammer tube.
  • the damping element is designed as an elastomeric ring. The damping element can effectively dampen the transmission of the return to the control sleeve.
  • the firing pin has at least one driving contour on which at least one driver element is mounted directly, and which is provided for driving at least one driver element parallel to the direction of impact.
  • a “driving contour” is to be understood in this context, in particular a bearing contour, which is intended to support the driver element at least in and against the direction of impact.
  • directly stored in this context, in particular a direct mechanical contact between surfaces of the driving contour and the driver element should be understood.
  • the driving contour is preferably formed as a recess in the firing pin.
  • the driver element has an outer contour, which can be inserted into the driving contour, so that the driver element is mounted without play on the firing pin, at least in and against the direction of impact.
  • the driver element is designed as a bolt.
  • the driving contour is designed as a fitting bore.
  • the driver element can be mounted positively on the firing pin.
  • the storage can be particularly reliable. Forces between the driver element and firing pin can be transmitted reliably.
  • Particularly preferably designed as a passport bore driving contour is formed as a blind hole. A maximum insertion depth of the driver element can be limited by the blind hole. Paragraphs for limiting an insertion depth can be omitted on the driver element.
  • the driver element can be designed particularly simple, in particular as a cylinder pin.
  • the firing pin on several driving contours, particularly preferably two.
  • the striking mechanism has a plurality of driver elements, particularly preferably two.
  • each driving contour supports a driver element.
  • the driving contours and driving elements can be designed particularly simple. The firing pin position and forces can be transmitted symmetrically by the firing pin with respect to a symmetry axis of the firing pin aligned in the direction of impact.
  • the driving contour is made in one piece with the firing pin.
  • the firing pin is made with the driving contour of a component.
  • the driving contour forming components, in particular bearing bushes can be omitted.
  • the coupling of the firing pin with the driver element can be particularly reliable and / or inexpensive.
  • a damping element arranged behind the driver element in the direction of impact is proposed, which is intended to dampen an idle impact of a racket on the firing pin.
  • a "blank” is to be understood in this context in particular a blow of the racket on the firing pin, which takes place in an idle mode and / or which takes place when the tool is not or only insufficiently pressed against the workpiece. Spaces can be made especially during a transition from impact mode to idle mode.
  • the racket can hit the firing pin several times during the transition before the racket movement at least decreases during idle operation.
  • the tool In the case of a blank, the tool is not supported or only slightly supported against the workpiece. The tool is accelerated in the direction of impact until the movement is limited by a stop of the tool holder.
  • the stop prevents the tool and / or the tool holder from being ejected from the drill and percussion hammer in the event of a clear blow.
  • the stop may preferably limit the movement of the firing pin in the direction of impact and derive the energy of the firing pin on the drilling and / or percussion hammer.
  • the damping element arranged in the direction of impact behind the driver element can be provided to dampen the idle impact of the firing pin and to transmit the energy of the blank to the drilling and / or percussion hammer.
  • the damping element transmits the energy of the blank to a percussion gear housing supporting the hammer tube.
  • the blank can be effectively damped. Damage caused by the blank can be avoided.
  • a power flow of the blank can be particularly short.
  • the impact mechanism can be particularly robust.
  • the spacer sleeve is supported in the direction of impact on the damping element for damping the blank.
  • the damping element is at least partially made of an elastomeric material.
  • the idle stroke can be effectively passed from the firing pin on the driver element on the spacer sleeve to the damping element.
  • the control sleeve can be effectively protected from the blank.
  • the damping element is supported for damping the blank in the direction of impact on the impact mechanism housing.
  • a stop on the striking mechanism housing is arranged in the direction of impact in front of the damping element for damping the idle stroke.
  • the damping element for damping the blank can effectively pass the idle impact to the percussion mechanism housing.
  • Other components can be protected by the blank.
  • a power flow for discharging the blank from the firing pin to the striking mechanism housing can be especially direct.
  • the blank can be derived over a small number of components from the firing pin to percussion gear housing, in particular via the driver elements, the spacer sleeve, the damping element for damping the blank, and a support of the damping element on percussion gear housing.
  • the machine tool can have the described advantages of the striking mechanism.
  • FIG. 1 shows a schematic representation of a section of a percussion mechanism 10a of a hammer and / or percussion hammer 12a, with a firing pin 14a and with two driver elements 16a for transmitting a firing pin position.
  • the striking mechanism 10a is designed as a pneumatic striking mechanism.
  • Such percussion devices are known in the art in construction and function.
  • a racket 30a is movably supported in an impact direction 18a and counter to the direction of impact 18a.
  • a not shown here, driven by an eccentric gear Piston is also arranged movably mounted in the hammer tube 34a on the side of the racket 30a facing away from the direction of impact 18a.
  • the piston upon movement in the direction of impact 18a, causes compression of a compression space 36a enclosed between racket 30a and piston in the hammer tube 34a, so that the racket 30a is accelerated in the direction of impact of the striking pin 14a.
  • the striker 30a Upon impact with the striker 14a, the striker 30a gives it a beat pulse.
  • the piston now moves counter to the direction of impact 18a, so that the beater 30a by a rebound from the firing pin 14a and a falling pressure in the compression chamber 36a against pressure in between the firing pin 14a and racket 30a in the hammer tube 34a arranged striking space 38a against the direction of impact 18a is moved back.
  • the firing pin 14a is mounted for movement in a tool holder 40a concentric with the hammer tube 40a; the tool holder 40a is fixedly mounted in the hammer tube 34a in the direction of impact 18a. In the direction of impact 18a behind the firing pin 14a, a user can clamp a tool 42a into the tool holder 40a.
  • the hammer tube 34a has idle openings 44a in a region between the beater 30a and the piston.
  • a pressure equalization of the compression space 36a takes place with an environment of the percussion mechanism 10a, so that the racket 30a is not or only slightly accelerated by the piston movement.
  • the hammer tube is surrounded by a control sleeve 22a.
  • the control sleeve 22a is movably mounted on the hammer tube 34a in and counter to the direction of impact 18a.
  • a spring element 48a is supported on a stop 52a arranged in the direction of impact 18a in front of the idling openings 44a and on the control sleeve 22a on its opposite end and exerts a spring force 50a in the direction of impact 18a on the control sleeve 22a.
  • the control sleeve 22a is supported in the direction of impact 18a on a damping element 26a arranged as a damping ring in the direction of impact 18a behind the control sleeve 22a.
  • the damping element 26a is supported in the direction of impact 18a on a spacer sleeve 24a arranged behind the damping element 26a in the direction of impact 18a.
  • the damping element 26a is arranged between the spacer sleeve 24a and the control sleeve 22a.
  • the spacer sleeve 24a has two fitting holes 54a and is provided with two as cylindrical driving pins trained Mit finallyelemementen 16a parallel to the direction of impact 18a in and against the direction of impact 18a firmly coupled to the firing pin 14a.
  • the firing pin 14a has two driving contours 20a, on which the driver elements 16a are mounted directly, and which are provided for driving the driver element 16a parallel to the direction of impact 18a.
  • the driving contours 20a are made in one piece with the firing pin 14a and designed as fitting bores, which are designed as blind holes.
  • a retaining ring 58a surrounds the spacer sleeve 24a and fixes the driver elements 16a in the fitting bores 54a. The driver elements 16a are thus provided to transfer the firing pin position to the spacer sleeve 24a and the control sleeve 22a.
  • the spring element 48a displaces by the spring force 50a via the control sleeve 22a the damping element 26a, the spacer sleeve 24a and the driver elements 16a up to a stop contour 56a of the tool holder 40a (FIG. FIG. 1 , under half).
  • the idling openings 44a are opened and the striking mechanism 10a is in idling operation.
  • the tool 42a movably mounted in the tool holder 40a in and counter to the direction of impact 18a displaces the firing pin 14a and the entrainment elements 16a, the spacer sleeve 24a Damping element 26a and the control sleeve 22a against the spring force 50a against the direction of impact 18a until the control sleeve 22a reaches the stop 52a ( FIG. 1 , upper half).
  • the control sleeve 22a now covers the idling openings 44a, so that the piston in the compression space 36a can generate a pressure and the racket 30a can be accelerated by the pressurization.
  • the impact mechanism 10a is now in impact mode and exerts impact pulses on the tool 42a as soon as the piston is driven by the eccentric gear with a permissible stroke frequency.
  • the damping element 26a is intended to damp a kickback of the firing pin 14a. If the firing pin 14a rebounds against the direction of impact 18a after a blow from the tool 42a, this kickback will occur passed on via the driver elements 16a to the spacer sleeve 24a. The damping element 26a gives this setback attenuated to the control sleeve 22a and thus protects them from damage and reduces vibrations.
  • the following description and the drawings of a further embodiment are essentially limited to the differences between the exemplary embodiments, reference being made in principle also to the drawings and / or the description of the other exemplary embodiments with respect to identically named components, in particular with regard to components having the same reference numbers can. To distinguish the embodiments, instead of the letter a of the first embodiment, the letter b of the second embodiment is readjusted.
  • FIG. 2 shows a schematic representation of a section of a striking mechanism 10b of a hammer and / or percussion hammer 12b, with a firing pin 14b and with two driver elements 16b for transmitting a firing pin position in a second embodiment.
  • the percussion mechanism 10b differs from the first exemplary embodiment in particular by a damping element 28b which is arranged behind the driver elements 16b in a direction of impact 18b and which is intended to dampen an idle impact of a racket 30b on the firing pin 14b. If a tool 42b is not pressed or with insufficient pressure on a workpiece, this deviates from the impact pulse of the firing pin 14b in the direction of impact. To stop the striker 14b, its impact energy must be dissipated.
  • a striking mechanism housing 32b surrounding a hammer tube 34b has a stop disc 60b fixed with a securing ring 62b. Between the stopper disc 60b and a spacer sleeve 24b designed as a damping ring damping element 28b is arranged. The spacer sleeve 24b is supported in the direction of impact 18b on the damping element 28b for damping the blank. The damping element 28b for damping the idle is supported in the impact direction 18b via the stop disc 60b on the percussion mechanism housing 32b. When the racket 30b strikes the firing pin 14b, it moves in the direction of impact 18b.
  • the striker 14b and with it the spacer sleeve 24b can move in the direction of impact. If the distance between spacer sleeve 24b and stopper disc 60b is less than the extent of the damping element 28b in the direction of impact 18b in a relaxed state, this damping element 28b is elastically deformed between the spacer sleeve 24b and the stopper disc 60b and exerts on the spacer sleeve 24b a restoring force opposing the direction of impact 18b. The damping element 28b brakes the firing pin 14b and gives the impact pulse attenuated to the striking mechanism housing 32b.
  • a hard impact of the firing pin 14b on a stop contour 56b of a tool holder 40b can be avoided.
  • a force flow from the firing pin 14b via the driver elements 16b, the spacer sleeve 24b, the damping element 28b, the stopper disc 60b, the circlip 62b to the hammer mechanism housing 32b has a particularly small number of components and a particularly short path. The power flow is passed on particularly reliably.

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

Description

Stand der TechnikState of the art

Es sind bereits Schlagwerke gemäß dem Oberbegriff des Anspruchs 1, insbesondere für einen Bohr- und/oder Schlaghammer, mit einem Schlagbolzen und mit einem Mitnehmerelement zur Übertragung einer Schlagbolzenposition bekannt.There are already Schlagwerke known according to the preamble of claim 1, in particular for a drill and / or percussion hammer, with a firing pin and with a driver element for transmitting a firing pin position.

Ein solches Schlagwerk ist auch aus der DE 10 2006 056 848 A1 bekannt.Such a percussion is also from the DE 10 2006 056 848 A1 known.

Offenbarung der ErfindungDisclosure of the invention

Die Erfindung geht aus von einem Schlagwerk, insbesondere für einen Bohr- und/oder Schlaghammer, gemäß Anspruch 1, mit einem Schlagbolzen und mit zumindest einem Mitnehmerelement zur Übertragung einer Schlagbolzenposition.The invention relates to an impact mechanism, in particular for a drill and / or percussion hammer, according to claim 1, with a firing pin and with at least one driver element for transmitting a firing pin position.

Erfindungsgemäß ist das zumindest eine Mitnehmerelement parallel zu einer Schlagrichtung in und entgegen der Schlagrichtung fest mit dem Schlagbolzen gekoppelt.According to the invention, the at least one driver element is coupled with the firing pin parallel to a direction of impact in and against the direction of impact.

Unter einem "Bohr- und/oder Schlaghammer" soll in diesem Zusammenhang insbesondere eine Handwerkzeugmaschine verstanden werden, die zu einer Bearbeitung eines Werkstücks mit einem drehenden oder nicht drehenden Werkzeug vorgesehen ist, wobei das Werkzeug durch die Handwerkzeugmaschine mit Schlagimpulsen beaufschlagt werden kann. Unter einer "Handwerkzeugmaschine" soll in diesem Zusammenhang eine Werkzeugmaschine verstanden werden, die dazu vorgesehen ist, zur Bearbeitung eines Werkstücks von einem Benutzer von Hand geführt zu werden. Unter einem "Schlagwerk" soll in diesen Zusammengang insbesondere eine Vorrichtung verstanden werden, die zumindest ein Bauteil aufweist, das zu einer Erzeugung und/oder Übertragung eines Schlagimpulses, insbesondere eines axialen Schlagimpulses in der Schlagrichtung, auf einen Schlagbolzen, vorgesehen ist.In this context, a "hammer drill and / or percussion hammer" is to be understood as meaning, in particular, a hand tool machine which is provided for machining a workpiece with a rotating or non-rotating tool, the tool being able to be acted upon by the hand tool machine with impact pulses. In this context, a "hand tool machine" should be understood to mean a machine tool which is intended to be manually guided by a user for machining a workpiece. A "percussion mechanism" is to be understood in this context, in particular a device which has at least one component which is provided for generating and / or transmitting a shock pulse, in particular an axial impact pulse in the direction of impact, on a firing pin.

Ein solches Bauteil kann insbesondere ein Schläger, ein Führungselement, wie insbesondere ein Hammerrohr und/oder ein Kolben, wie insbesondere ein Topfkolben, und/oder ein weiteres, dem Fachmann als sinnvoll erscheinendes Bauteil sein. Unter einem "Hammerrohr" soll in diesem Zusammenhang insbesondere ein bevorzugt rohrförmig ausgebildetes Bauteil verstanden werden, in dem der Schlagbolzen und/oder der Schläger und/oder der Kolben geführt werden. Unter einem "Kolben" soll in diesem Zusammenhang insbesondere ein in und entgegen der Schlagrichtung zyklisch antreibbares, im Hammerrohr geführtes Bauteil verstanden werden, das dazu vorgesehen ist, den Schläger durch eine Druckbeaufschlagung eines vom Schläger und Kolben eingeschlossenen Raums im Hammerrohr zyklisch zu bewegen. Der Schläger kann auch durch eine zyklische Druckbeaufschlagung zumindest eines vom Schläger begrenzten Raums im Hammerrohr durch eine externe, außerhalb des Hammerrohrs angeordnete Druckquelle bewegt werden. Bevorzugt wird der Schläger in einem Schlagbetrieb im Hammerrohr in und entgegen der Schlagrichtung zyklisch bewegt und übt Schlagimpulse auf den Schlagbolzen aus. Bevorzugt überträgt der Schlagbolzen die Schlagimpulse auf das Werkzeug. Das Werkzeug ist bevorzugt in einem Werkzeughalter eingespannt. Unter "vorgesehen" soll insbesondere speziell ausgelegt und/oder speziell ausgestattet verstanden werden. Unter einer "Schlagbolzenposition" soll in diesem Zusammenhang insbesondere eine Position des Schlagbolzens in Schlagrichtung bezogen auf das Hammerrohr verstanden werden. Insbesondere kann der Schlagbolzen entgegen der Schlagrichtung bevorzugt gegen eine Federkraft von einer Leerlaufposition in eine Schlagposition verlagert werden. Unter einer "Schlagposition" soll in diesem Zusammenhang insbesondere eine Schlagbolzenposition verstanden werden, in der das Schlagwerk für einen Schlagbetrieb vorgesehen ist. Unter einem "Schlagbetrieb" soll in diesem Zusammenhang insbesondere ein Betriebszustand des Schlagwerks verstanden werden, in dem das Schlagwerk Schlagimpulse auf das Werkzeug ausübt, die zur Bearbeitung eines Werkstücks vorgesehen sind. Eine Schlagstärke der Schlagimpulse kann durch eine Auslegung des Schlagwerks bestimmt und/oder durch den Benutzer und/oder eine Steuereinheit des Schlagwerks festgelegt werden. Unter einer "Leerlaufposition" soll in diesem Zusammenhang insbesondere eine Schlagbolzenposition verstanden werden, in der das Schlagwerk für einen Leerlaufbetrieb vorgesehen ist. Unter einem "Leerlaufbetrieb" soll in diesem Zusammenhang insbesondere ein Betriebszustand des Schlagwerks verstanden werden, in dem das Schlagwerk keine oder nur geringe Schlagimpulse auf das Werkzeug ausübt, insbesondere Schlagimpulse die weniger als 50%, bevorzugt weniger als 25%, besonders bevorzugt weniger als 10% der Schlagstärke der Schlagimpulse im Schlagbetrieb aufweisen. Bevorzugt wird die Verlagerung des Schlagbolzens in die Leerlaufposition und die Schlagposition durch einen Anschlag begrenzt. Bevorzugt wird der Schlagbolzen von der Leerlaufposition in die Schlagposition verlagert, indem der Benutzer das Werkzeug gegen das zu bearbeitende Werkstück drückt. Das Werkzeug und/oder der Werkzeughalter ist am Bohr- und/oder Schlaghammer bevorzugt in Schlagrichtung beweglich gelagert. Das Werkzeug und/oder der Werkzeughalter stützen sich entgegen der Schlagrichtung am Schlagbolzen ab und verschieben diesen bei Überschreiten einer minimalen Anpresskraft entgegen der Federkraft von der Leerlaufposition in die Schlagposition. Wird das Werkzeug vom Werkstück abgesetzt, kann der Schlagbolzen und das Werkzeug und/oder der Werkzeughalter durch die Federkraft zurück in die Leerlaufposition verlagert werden. Bevorzugt ist das zumindest eine Mitnehmerelement dazu vorgesehen, die Schlagbolzenposition zur Umschaltung des Schlagwerks vom Leerlaufbetrieb in den Schlagbetrieb und umgekehrt zu übertragen. Unter "fest gekoppelt" soll in diesem Zusammenhang insbesondere verstanden werden, dass das Mitnehmerelement am Schlagbolzen in einem betriebsbereit montierten Zustand im Schlagwerk in Schlagrichtung spielfrei gelagert ist. Unter "spielfrei" soll in diesem Zusammenhang insbesondere verstanden werden, dass Relativbewegungen des Mitnehmerelements zum Schlagbolzen in Schlagrichtung durch die Lagerung des Mitnehmerelements am Schlagbolzen auf weniger als 1 mm, bevorzugt weniger als 0.5mm, besonders bevorzugt weniger als 0.1 mm begrenzt sind. Besonders bevorzugt kann das Mitnehmerelement dazu vorgesehen sein, Kräfte in und entgegen der Schlagrichtung auf den Schlagbolzen zu übertragen. Die Schlagbolzenposition kann besonders zuverlässig übertragen werden. Es können Bauteile eingespart werden, insbesondere ein zwischen Schlagbolzen und Mitnehmerelement angeordnetes Übertragungsbauteil wie eine Anschlagbuchse. Lagerflächen für eine Anschlagbuchse am Schlagbolzen können entfallen. Eine Herstellung des Schlagbolzens, insbesondere einer Außenkontur des Schlagbolzens, kann vereinfacht sein. Eine Masse des Schlagbolzens kann besonders groß sein. Der Schlagbolzen kann besonders hohe Schlagimpulse weitergeben. Die Schlagbolzenposition kann durch das zumindest eine Mitnehmerelement in Schlagrichtung und entgegen der Schlagrichtung weitergegeben werden. Kräfte können vom Schlagbolzen über das Mitnehmerelement in Schlagrichtung und entgegen der Schlagrichtung weitergegeben werden. Der Schlagbolzen kann in und entgegen der Schlagrichtung durch das Mitnehmerelement abgestützt werden.Such a component may in particular be a racket, a guide element, in particular a hammer tube and / or a piston, such as, in particular, a pot piston, and / or another component which appears expedient to the person skilled in the art. In this context, a "hammer tube" is to be understood as meaning, in particular, a preferably tubular component in which the firing pin and / or the racket and / or the piston are guided. A "piston" is to be understood in this context in particular a cyclically driven in and against the direction of impact, run in the hammer tube component, which is intended to cyclically move the racket by pressurizing a space enclosed by the racket and piston in the hammer tube. The racket can also be moved by a cyclic pressurization of at least one of the racket limited space in the hammer tube by an external, arranged outside the hammer tube pressure source. Preferably, the bat is cyclically moved in a hammering operation in the hammer tube in and against the direction of impact and exerts impact pulses on the firing pin. Preferably, the firing pin transmits the impact pulses to the tool. The tool is preferably clamped in a tool holder. By "intended" is intended to be understood in particular specifically designed and / or specially equipped. A "firing pin position" should be understood in this context, in particular a position of the firing pin in the direction of impact relative to the hammer tube. In particular, the firing pin against the direction of impact can preferably be displaced against a spring force from an idle position to an impact position. In this context, a "striking position" is to be understood as meaning, in particular, a firing pin position in which the impact mechanism is provided for impact operation. In this context, "impact operation" is to be understood as meaning, in particular, an operating state of the percussion mechanism in which the percussion mechanism exerts impact pulses on the tool which are provided for machining a workpiece. An impact strength of the impact pulses can be determined by a design of the striking mechanism and / or determined by the user and / or a control unit of the impact mechanism. Under an "idle position" is to be understood in this context, in particular a firing pin position in which the hammer mechanism is provided for idling operation. In this context, an "idling operation" is to be understood as meaning, in particular, an operating state of the impact mechanism in which the percussion mechanism produces no or only small impact pulses on the tool exercises, in particular impact pulses which have less than 50%, preferably less than 25%, more preferably less than 10% of the impact strength of the impact pulses in impact mode. Preferably, the displacement of the firing pin in the idle position and the impact position is limited by a stop. Preferably, the firing pin is displaced from the idle position to the hitting position by the user pressing the tool against the workpiece to be machined. The tool and / or the tool holder is preferably movably mounted on the drilling and / or percussion hammer in the direction of impact. The tool and / or the tool holder are supported against the impact direction on the firing pin and move it when a minimum contact force against the spring force from the idle position to the impact position is exceeded. If the tool is set off from the workpiece, the firing pin and the tool and / or the tool holder can be moved by the spring force back to the idle position. Preferably, the at least one driver element is provided to transmit the firing pin position for switching the percussion mechanism from idle mode to percussion mode and vice versa. By "firmly coupled" is to be understood in this context, in particular, that the driving element is mounted without play on the firing pin in a ready-mounted state in the percussion in the direction of impact. In this context, "play-free" is to be understood in particular as meaning that relative movements of the driver element to the firing pin in the impact direction are limited to less than 1 mm, preferably less than 0.5 mm, particularly preferably less than 0.1 mm, due to the bearing of the driver element on the firing pin. Particularly preferably, the driver element may be provided to transmit forces in and against the direction of impact on the firing pin. The firing pin position can be transferred very reliably. It can be saved components, in particular a arranged between the firing pin and driver element transmission member such as a stop bushing. Storage areas for a stop bushing on the firing pin can be omitted. A production of the firing pin, in particular an outer contour of the firing pin, can be simplified. A mass of the firing pin can be particularly large. The firing pin can pass on particularly high impact pulses. The firing pin position can be passed through the at least one driver element in the direction of impact and against the direction of impact. Forces can from the firing pin on the driver element in the direction of impact and be passed against the direction of impact. The firing pin can be supported in and against the direction of impact by the driver element.

Erfindungsgemäß ist das zumindest eine Mitnehmerelement dazu vorgesehen, die Schlagbolzenposition auf eine Steuerhülse und eine Abstandshülse zu übertragen. Unter einer "Steuerhülse" soll in diesem Zusammenhang insbesondere ein das Hammerrohr umgebendes Bauteil verstanden werden, das dazu vorgesehen ist, das Schlagwerk zwischen Leerlaufbetrieb und Schlagbetrieb umzuschalten. Insbesondere kann die Steuerhülse dazu vorgesehen sein, in der Leerlaufposition Leerlauföffnungen freizugeben, die den an den Schläger angrenzenden Raum, der zur Druckbeaufschlagung des Schlägers vorgesehen ist, entlüften. Die Druckbeaufschlagung des Schlägers kann im Leerlaufbetrieb zumindest reduziert und eine Schlägerbewegung zumindest verringert werden. Die Leerlauföffnungen sind bevorzugt im Hammerrohr angeordnet. Bevorzugt sind die Leerlauföffnungen im Hammerrohr auf der der Schlagrichtung abgewandten Seite des Schlägers angeordnet. Bevorzugt ist die Steuerhülse dazu vorgesehen, in der Schlagposition die Leerlauföffnungen zu überdecken und zumindest im Wesentlichen zu verschließen. Unter "zumindest im Wesentlichen" soll in diesem Zusammenhang insbesondere eine Reduktion des Strömungsquerschnitts um mehr als 90%, bevorzugt mehr als 95%, besonders bevorzugt mehr als 99% verstanden werden. Die Schlagbolzenposition kann wirkungsvoll zur Umschaltung des Schlagwerks zwischen Leerlaufbetrieb und Schlagbetrieb genutzt werden. Unter einer "Abstandshülse" soll in diesem Zusammenhang insbesondere ein in Schlagrichtung vor der Steuerhülse angeordnetes Bauteil verstanden werden, das dazu vorgesehen ist, die Schlagbolzenposition vom Mitnehmerelement auf die Steuerhülse zu übertragen. Die Abstandshülse kann mit der Steuerhülse direkt oder bevorzugt indirekt über weitere Bauteile in Verbindung stehen. Insbesondere können zwischen Abstandshülse und Steuerhülse zumindest im Wesentlichen nur Druckkräfte übertragen werden und/oder bei der Kraftübertragung eine Dämpfung erfolgen. Die Steuerhülse kann wirksam vor Überlastung und/oder Beschädigungen durch vom Schlagbolzen übertragene Kräfte geschützt werden.According to the invention, the at least one driver element is provided to transmit the firing pin position to a control sleeve and a spacer sleeve. A "control sleeve" is to be understood in this context in particular a surrounding the hammer tube component, which is intended to switch the percussion between idle mode and impact mode. In particular, the control sleeve may be provided to release in the idle position idling openings, which vent the space adjacent to the racket, which is provided for pressurizing the racket vent. The pressurization of the racket can be at least reduced in idle mode and a racket movement at least reduced. The idling openings are preferably arranged in the hammer tube. Preferably, the idling openings are arranged in the hammer tube on the side facing away from the impact direction of the racket. Preferably, the control sleeve is provided to cover the idle openings in the impact position and at least substantially close. By "at least substantially" should be understood in this context in particular a reduction of the flow cross-section by more than 90%, preferably more than 95%, particularly preferably more than 99%. The firing pin position can be effectively used to switch the percussion between idling and impact mode. In this context, a "spacer sleeve" is to be understood as meaning, in particular, a component arranged in the direction of impact in front of the control sleeve, which component is intended to transmit the firing pin position from the driver element to the control sleeve. The spacer sleeve can communicate with the control sleeve directly or preferably indirectly via other components. In particular, between pressure sleeve and control sleeve at least substantially only compressive forces can be transmitted and / or at the Power transmission take place a damping. The control sleeve can be effectively protected against overload and / or damage caused by the firing pin forces.

Weiter wird erfindungsgemäß in der Schlagrichtung vor dem Mitnehmerelement ein Dämpfungselement angeordnet, das dazu vorgesehen ist, einen Rückschlag des Schlagbolzens zu dämpfen. Unter einem "Rückschlag" des Schlagbolzens soll insbesondere ein Rückprall des Schlagbolzens vom Werkzeug verstanden werden. Der Rückschlag tritt auf, nach dem der Schlagbolzen bei einem Schlag auf das Werkzeug einen Teil seiner Energie an das Werkzeug abgegeben hat und von diesem zurückprallt. Der Schlagbolzen kann sich nun bis zum nächsten durch den Schläger auf den Schlagbolzen ausgeübten Schlagimpuls entgegen der Schlagrichtung bewegen. Diese Bewegung des Schlagbolzens entgegen der Schlagrichtung wird durch das Mitnehmerelement übertragen. Das in Schlagrichtung hinter dem Mitnehmerelement angeordnete Dämpfungselement kann den Rückschlag wirkungsvoll dämpfen. Insbesondere kann das Dämpfungselement eine Übertragung des Rückschlags auf die Steuerhülse und/oder weitere Bauteile des Schlagwerks reduzieren. Vibrationen können vermindert werden. Ein Bedienkomfort kann erhöht sein. Geräuschemissionen können reduziert werden.Further, according to the invention, a damping element is arranged in the direction of impact in front of the driver element, which is intended to damp a kickback of the firing pin. A "kickback" of the firing pin is to be understood in particular a rebound of the firing pin from the tool. The recoil occurs after the firing pin has given off a part of its energy to the tool and rebounds from a blow to the tool. The firing pin can now move counter to the direction of impact until the next impact pulse exerted on the firing pin by the bat. This movement of the firing pin against the direction of impact is transmitted by the driver element. The arranged in the direction of impact behind the driver element damping element can dampen the setback effectively. In particular, the damping element can reduce a transmission of the kickback on the control sleeve and / or other components of the striking mechanism. Vibrations can be reduced. An ease of use can be increased. Noise emissions can be reduced.

Ein Verschleiß kann vermindert sein. Das Dämpfungselement kann bevorzugt zumindest teilweise aus einem Elastomermaterial gefertigt sein.Wear can be reduced. The damping element may preferably be made at least partially of an elastomeric material.

Erfindungsgemäß ist das Dämpfungselement zur Dämpfung des Rückschlags zwischen der Abstandshülse und der Steuerhülse angeordnet.According to the invention, the damping element for damping the backlash between the spacer sleeve and the control sleeve is arranged.

Besonders bevorzugt ist das Dämpfungselement als ringförmiges Bauteil zwischen der Abstandshülse und der Steuerhülse ausgebildet. Bevorzugt umgibt das Dämpfungselement das Hammerrohr. Besonders bevorzugt ist das Dämpfungselement als Elastomerring ausgebildet. Das Dämpfungselement kann wirksam die Weitergabe des Rückschlags an die Steuerhülse dämpfen.Particularly preferably, the damping element is designed as an annular component between the spacer sleeve and the control sleeve. Preferably, the damping element surrounds the hammer tube. Particularly preferably, the damping element is designed as an elastomeric ring. The damping element can effectively dampen the transmission of the return to the control sleeve.

Weiter wird vorgeschlagen, dass der Schlagbolzen zumindest eine Mitnahmekontur aufweist, an der zumindest ein Mitnehmerelement direkt gelagert ist, und die zur Mitnahme zumindest eines Mitnehmerelements parallel zur Schlagrichtung vorgesehen ist. Unter einer "Mitnahmekontur" soll in diesem Zusammenhang insbesondere eine Lagerkontur verstanden werden, die dazu vorgesehen ist, das Mitnehmerelement zumindest in und entgegen der Schlagrichtung zu lagern. Unter "direkt" gelagert soll in diesem Zusammenhang insbesondere ein direkter mechanischer Kontakt zwischen Oberflächen der Mitnahmekontur und des Mitnehmerelements verstanden werden. Die Mitnahmekontur ist bevorzugt als Ausnehmung im Schlagbolzen ausgebildet. Bevorzugt weist das Mitnehmerelement eine Außenkontur auf, die sich in die Mitnahmekontur einführen lässt, so dass das Mitnehmerelement am Schlagbolzen zumindest in und entgegen der Schlagrichtung spielfrei gelagert wird. Bevorzugt ist das Mitnehmerelement als Bolzen ausgebildet. Bevorzugt ist die Mitnahmekontur als Passbohrung ausgebildet. Das Mitnehmerelement kann am Schlagbolzen formschlüssig gelagert werden. Die Lagerung kann besonders zuverlässig sein. Kräfte zwischen Mitnehmerelement und Schlagbolzen können zuverlässig übertragen werden. Besonders bevorzugt ist die als Passbohrung ausgebildete Mitnahmekontur als Sackloch ausgebildet. Eine maximale Einführtiefe des Mitnehmerelements kann durch das Sackloch begrenzt werden. Absätze zur Begrenzung einer Einführtiefe können am Mitnehmerelement entfallen. Das Mitnehmerelement kann besonders einfach gestaltet sein, insbesondere als Zylinderbolzen. Bevorzugt weist der Schlagbolzen mehrere Mitnahmekonturen auf, besonders bevorzugt zwei. Bevorzugt weist das Schlagwerk mehrere Mitnehmerelemente auf, besonders bevorzugt zwei. Besonders bevorzugt lagert jede Mitnahmekontur ein Mitnehmerelement. Die Mitnahmekonturen und Mitnehmerelemente können besonders einfach gestaltet sein. Die Schlagbolzenposition und Kräfte können vom Schlagbolzen bezüglich einer in Schlagrichtung ausgerichteten Symmetrieachse des Schlagbolzens symmetrisch weitergegeben werden.It is further proposed that the firing pin has at least one driving contour on which at least one driver element is mounted directly, and which is provided for driving at least one driver element parallel to the direction of impact. A "driving contour" is to be understood in this context, in particular a bearing contour, which is intended to support the driver element at least in and against the direction of impact. By "directly" stored in this context, in particular a direct mechanical contact between surfaces of the driving contour and the driver element should be understood. The driving contour is preferably formed as a recess in the firing pin. Preferably, the driver element has an outer contour, which can be inserted into the driving contour, so that the driver element is mounted without play on the firing pin, at least in and against the direction of impact. Preferably, the driver element is designed as a bolt. Preferably, the driving contour is designed as a fitting bore. The driver element can be mounted positively on the firing pin. The storage can be particularly reliable. Forces between the driver element and firing pin can be transmitted reliably. Particularly preferably designed as a passport bore driving contour is formed as a blind hole. A maximum insertion depth of the driver element can be limited by the blind hole. Paragraphs for limiting an insertion depth can be omitted on the driver element. The driver element can be designed particularly simple, in particular as a cylinder pin. Preferably, the firing pin on several driving contours, particularly preferably two. Preferably, the striking mechanism has a plurality of driver elements, particularly preferably two. Particularly preferably, each driving contour supports a driver element. The driving contours and driving elements can be designed particularly simple. The firing pin position and forces can be transmitted symmetrically by the firing pin with respect to a symmetry axis of the firing pin aligned in the direction of impact.

Es wird vorgeschlagen, dass die Mitnahmekontur einstückig mit dem Schlagbolzen ausgeführt ist. Besonders bevorzugt ist der Schlagbolzen mit der Mitnahmekontur aus einem Bauteil gefertigt. Weitere, die Mitnahmekontur bildende Bauteile, insbesondere Lagerbuchsen, können entfallen. Die Kopplung des Schlagbolzens mit dem Mitnehmerelement kann besonders zuverlässig und/oder kostengünstig sein.It is proposed that the driving contour is made in one piece with the firing pin. Particularly preferably, the firing pin is made with the driving contour of a component. Further, the driving contour forming components, in particular bearing bushes can be omitted. The coupling of the firing pin with the driver element can be particularly reliable and / or inexpensive.

Weiter wird ein in der Schlagrichtung hinter dem Mitnehmerelement angeordnetes Dämpfungselement vorgeschlagen, das dazu vorgesehen ist, einen Leerschlag eines Schlägers auf den Schlagbolzen zu dämpfen. Unter einem "Leerschlag" soll in diesem Zusammenhang insbesondere ein Schlag des Schlägers auf den Schlagbolzen verstanden werden, der in einem Leerlaufbetrieb erfolgt und/oder der erfolgt, wenn das Werkzeug an das Werkstück nicht oder nur ungenügend angedrückt wird. Leerschläge können insbesondere bei einem Übergang vom Schlagbetrieb in den Leerlaufbetrieb erfolgen. Der Schläger kann beim Übergang noch einige male auf den Schlagbolzen auftreffen bevor sich im Leerlaufbetrieb die Schlägerbewegung zumindest verringert. Bei einem Leerschlag wird das Werkzeug nicht oder nur gering gegen das Werkstück abgestützt. Das Werkzeug wird in Schlagrichtung beschleunigt, bis die Bewegung durch einen Anschlag des Werkzeughalters begrenzt wird. Der Anschlag verhindert, dass das Werkzeug und/oder der Werkzeughalter bei einem Leerschlag aus dem Bohr- und Schlaghammer herausgeschleudert werden. Der Anschlag kann bevorzugt die Bewegung des Schlagbolzens in Schlagrichtung begrenzen und die Energie des Schlagbolzens an den Bohr- und/oder Schlaghammer ableiten. Das in Schlagrichtung hinter dem Mitnehmerelement angeordnete Dämpfungselement kann dazu vorgesehen sein, den Leerschlag des Schlagbolzens zu dämpfen und die Energie des Leerschlags an den Bohr- und/oder Schlaghammer zu übertragen. Bevorzugt überträgt das Dämpfungselement die Energie des Leerschlags an ein das Hammerrohr lagerndes Schlagwerkgehäuse. Der Leerschlag kann wirksam gedämpft werden. Beschädigungen durch den Leerschlag können vermieden werden. Ein Kraftfluss des Leerschlags kann besonders kurz sein. Das Schlagwerk kann besonders robust sein.Furthermore, a damping element arranged behind the driver element in the direction of impact is proposed, which is intended to dampen an idle impact of a racket on the firing pin. A "blank" is to be understood in this context in particular a blow of the racket on the firing pin, which takes place in an idle mode and / or which takes place when the tool is not or only insufficiently pressed against the workpiece. Spaces can be made especially during a transition from impact mode to idle mode. The racket can hit the firing pin several times during the transition before the racket movement at least decreases during idle operation. In the case of a blank, the tool is not supported or only slightly supported against the workpiece. The tool is accelerated in the direction of impact until the movement is limited by a stop of the tool holder. The stop prevents the tool and / or the tool holder from being ejected from the drill and percussion hammer in the event of a clear blow. The stop may preferably limit the movement of the firing pin in the direction of impact and derive the energy of the firing pin on the drilling and / or percussion hammer. The damping element arranged in the direction of impact behind the driver element can be provided to dampen the idle impact of the firing pin and to transmit the energy of the blank to the drilling and / or percussion hammer. Preferably, the damping element transmits the energy of the blank to a percussion gear housing supporting the hammer tube. The blank can be effectively damped. Damage caused by the blank can be avoided. A power flow of the blank can be particularly short. The impact mechanism can be particularly robust.

Weiter wird vorgeschlagen, dass sich die Abstandshülse in Schlagrichtung am Dämpfungselement zur Dämpfung des Leerschlags abstützt. Bevorzugt ist das Dämpfungselement zumindest teilweise aus einem Elastomermaterial gefertigt. Der Leerschlag kann wirksam vom Schlagbolzen über das Mitnehmerelement über die Abstandshülse an das Dämpfungselement weitergegeben werden. Die Steuerhülse kann wirkungsvoll vom Leerschlag geschützt werden.It is further proposed that the spacer sleeve is supported in the direction of impact on the damping element for damping the blank. Preferably, the damping element is at least partially made of an elastomeric material. The idle stroke can be effectively passed from the firing pin on the driver element on the spacer sleeve to the damping element. The control sleeve can be effectively protected from the blank.

Weiter wird vorgeschlagen, dass sich das Dämpfungselement zur Dämpfung des Leerschlags in Schlagrichtung am Schlagwerkgehäuse abstützt. Bevorzugt ist ein Anschlag am Schlagwerkgehäuse in Schlagrichtung vor dem Dämpfungselement zur Dämpfung des Leerschlags angeordnet. Das Dämpfungselement zur Dämpfung des Leerschlags kann den Leerschlag wirkungsvoll an das Schlagwerkgehäuse weitergeben. Weitere Bauteile können vom Leerschlag geschützt werden. Ein Kraftfluss zur Ableitung des Leerschlags vom Schlagbolzen zum Schlagwerkgehäuse kann besonders direkt sein. Insbesondere kann der Leerschlag über eine geringe Anzahl Bauteile vom Schlagbolzen zum Schlagwerkgehäuse abgeleitet werden, insbesondere über die Mitnehmerelemente, die Abstandshülse, das Dämpfungselement zur Dämpfung des Leerschlags, und eine Abstützung des Dämpfungselements am Schlagwerkgehäuse.It is further proposed that the damping element is supported for damping the blank in the direction of impact on the impact mechanism housing. Preferably, a stop on the striking mechanism housing is arranged in the direction of impact in front of the damping element for damping the idle stroke. The damping element for damping the blank can effectively pass the idle impact to the percussion mechanism housing. Other components can be protected by the blank. A power flow for discharging the blank from the firing pin to the striking mechanism housing can be especially direct. In particular, the blank can be derived over a small number of components from the firing pin to percussion gear housing, in particular via the driver elements, the spacer sleeve, the damping element for damping the blank, and a support of the damping element on percussion gear housing.

Weiter wird eine Werkzeugmaschine mit dem beschriebenen Schlagwerk vorgeschlagen. Die Werkzeugmaschine kann die beschriebenen Vorteile des Schlagwerks aufweisen.Next, a machine tool with the hammer mechanism described is proposed. The machine tool can have the described advantages of the striking mechanism.

Zeichnungdrawing

Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In den Zeichnungen sind zwei Ausführungsbeispiele der Erfindung dargestellt. Die Zeichnungen, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination.Further advantages emerge from the following description of the drawing. In the drawings, two embodiments of the invention are shown. The drawings, the description and the claims contain numerous features in combination.

Es zeigt:

Fig. 1
eine schematische Darstellung eines Ausschnitts eines Schlagwerks mit einem Mitnehmerelement, das parallel zu einer Schlagrichtung fest mit einem Schlagbolzen gekoppelt ist und
Fig. 2
eine schematische Darstellung eines Ausschnitts eines Schlagwerks mit einem Mitnehmerelement, das parallel zu einer Schlagrichtung fest mit einem Schlagbolzen gekoppelt ist in einem zweiten Ausführungsbeispiel.
It shows:
Fig. 1
a schematic representation of a section of a striking mechanism with a driver element which is coupled parallel to a direction of impact firmly with a firing pin and
Fig. 2
a schematic representation of a section of a percussion mechanism with a driver element which is fixedly coupled parallel to a direction of impact with a firing pin in a second embodiment.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Figur 1 zeigt eine schematische Darstellung eines Ausschnitts eines Schlagwerks 10a eines Bohr- und/oder Schlaghammers 12a, mit einem Schlagbolzen 14a und mit zwei Mitnehmerelementen 16a zur Übertragung einer Schlagbolzenposition. Das Schlagwerk 10a ist als pneumatisches Schlagwerk ausgebildet. Solche Schlagwerke sind dem Fachmann in ihrem Aufbau und Funktion bekannt. In einem Hammerrohr 34a ist ein Schläger 30a in einer Schlagrichtung 18a und entgegen der Schlagrichtung 18a beweglich gelagert. Ein hier nicht näher dargestellter, von einem Exzentergetriebe angetriebener Kolben ist auf der der Schlagrichtung 18a abgewandten Seite des Schlägers 30a ebenfalls im Hammerrohr 34a beweglich gelagert angeordnet. Der Kolben bewirkt bei einer Bewegung in Schlagrichtung 18a eine Kompression eines zwischen Schläger 30a und Kolben eingeschlossenen Kompressionsraums 36a im Hammerrohr 34a, so dass der Schläger 30a in Schlagrichtung 18a in Richtung des Schlagbolzens 14a beschleunigt wird. Bei einem Aufprall auf den Schlagbolzen 14a gibt der Schläger 30a an diesen einen Schlagimpuls weiter. Der Kolben bewegt sich nun entgegen der Schlagrichtung 18a, so dass der Schläger 30a durch einen Rückprall vom Schlagbolzen 14a sowie einen durch die Kolbenbewegung fallenden Druck im Kompressionsraum 36a gegenüber einem Druck im zwischen Schlagbolzen 14a und Schläger 30a im Hammerrohr 34a angeordneten Schlagraum 38a entgegen der Schlagrichtung 18a zurückbewegt wird. Dieser Vorgang wiederholt sich während eines Schlagbetriebs zyklisch, so dass der Schläger 30a wiederholte Schlagimpulse auf den Schlagbolzen 14a ausübt. Der Schlagbolzen 14a ist in einem Werkzeughalter 40a konzentrisch zum Hammerrohr 40a beweglich gelagert; der Werkzeughalter 40a ist im Hammerrohr 34a in Schlagrichtung 18a fixiert gelagert. In Schlagrichtung 18a hinter dem Schlagbolzen 14a kann ein Benutzer in den Werkzeughalter 40a ein Werkzeug 42a einspannen. Das Hammerrohr 34a weist in einem Bereich zwischen Schläger 30a und Kolben Leerlauföffnungen 44a auf. Sind diese geöffnet, findet ein Druckausgleich des Kompressionsraums 36a mit einer Umgebung des Schlagwerks 10a statt, so dass der Schläger 30a durch die Kolbenbewegung nicht oder nur wenig beschleunigt wird. Das Hammerrohr wird von einer Steuerhülse 22a umgeben. Die Steuerhülse 22a ist am Hammerrohr 34a in und entgegen der Schlagrichtung 18a beweglich gelagert. Ein Federelement 48a stützt sich an einem in Schlagrichtung 18a vor den Leerlauföffnungen 44a angeordneten Anschlag 52a und an seinem gegenüberliegenden Ende an der Steuerhülse 22a ab und übt eine Federkraft 50a in Schlagrichtung 18a auf die Steuerhülse 22a aus. Die Steuerhülse 22a stützt sich in Schlagrichtung 18a an einem in Schlagrichtung 18a hinter der Steuerhülse 22a angeordneten als Dämpfungsring ausgebildeten Dämpfungselement 26a ab. Das Dämpfungselement 26a stützt sich in Schlagrichtung 18a an einer in Schlagrichtung 18a hinter dem Dämpfungselement 26a angeordneten Abstandshülse 24a ab. Das Dämpfungselement 26a ist zwischen der Abstandshülse 24a und der Steuerhülse 22a angeordnet. Die Abstandshülse 24a weist zwei Passbohrungen 54a auf und ist mit zwei als zylindrische Mitnehmerbolzen ausgebildeten Mitnehmerelemementen 16a parallel zur Schlagrichtung 18a in und entgegen der Schlagrichtung 18a fest mit dem Schlagbolzen 14a gekoppelt. Der Schlagbolzen 14a weist zwei Mitnahmekonturen 20a auf, an der die Mitnehmerelemente 16a direkt gelagert sind, und die zur Mitnahme des Mitnehmerelements 16a parallel zur Schlagrichtung 18a vorgesehen sind. Die Mitnahmekonturen 20a sind einstückig mit dem Schlagbolzen 14a ausgeführt und als Passbohrungen ausgebildet, die als Sacklöcher ausgeführt sind. Ein Haltering 58a umgibt die Abstandshülse 24a und fixiert die Mitnehmerelemente 16a in den Passbohrungen 54a. Die Mitnehmerelemente 16a sind somit dazu vorgesehen, die Schlagbolzenposition auf die Abstandshülse 24a und die Steuerhülse 22a zu übertragen. FIG. 1 shows a schematic representation of a section of a percussion mechanism 10a of a hammer and / or percussion hammer 12a, with a firing pin 14a and with two driver elements 16a for transmitting a firing pin position. The striking mechanism 10a is designed as a pneumatic striking mechanism. Such percussion devices are known in the art in construction and function. In a hammer tube 34a, a racket 30a is movably supported in an impact direction 18a and counter to the direction of impact 18a. A not shown here, driven by an eccentric gear Piston is also arranged movably mounted in the hammer tube 34a on the side of the racket 30a facing away from the direction of impact 18a. The piston, upon movement in the direction of impact 18a, causes compression of a compression space 36a enclosed between racket 30a and piston in the hammer tube 34a, so that the racket 30a is accelerated in the direction of impact of the striking pin 14a. Upon impact with the striker 14a, the striker 30a gives it a beat pulse. The piston now moves counter to the direction of impact 18a, so that the beater 30a by a rebound from the firing pin 14a and a falling pressure in the compression chamber 36a against pressure in between the firing pin 14a and racket 30a in the hammer tube 34a arranged striking space 38a against the direction of impact 18a is moved back. This process is repeated cyclically during a beat operation, so that the beater 30a exerts repeated impact pulses on the firing pin 14a. The firing pin 14a is mounted for movement in a tool holder 40a concentric with the hammer tube 40a; the tool holder 40a is fixedly mounted in the hammer tube 34a in the direction of impact 18a. In the direction of impact 18a behind the firing pin 14a, a user can clamp a tool 42a into the tool holder 40a. The hammer tube 34a has idle openings 44a in a region between the beater 30a and the piston. When these are opened, a pressure equalization of the compression space 36a takes place with an environment of the percussion mechanism 10a, so that the racket 30a is not or only slightly accelerated by the piston movement. The hammer tube is surrounded by a control sleeve 22a. The control sleeve 22a is movably mounted on the hammer tube 34a in and counter to the direction of impact 18a. A spring element 48a is supported on a stop 52a arranged in the direction of impact 18a in front of the idling openings 44a and on the control sleeve 22a on its opposite end and exerts a spring force 50a in the direction of impact 18a on the control sleeve 22a. The control sleeve 22a is supported in the direction of impact 18a on a damping element 26a arranged as a damping ring in the direction of impact 18a behind the control sleeve 22a. The damping element 26a is supported in the direction of impact 18a on a spacer sleeve 24a arranged behind the damping element 26a in the direction of impact 18a. The damping element 26a is arranged between the spacer sleeve 24a and the control sleeve 22a. The spacer sleeve 24a has two fitting holes 54a and is provided with two as cylindrical driving pins trained Mitnehmerelemementen 16a parallel to the direction of impact 18a in and against the direction of impact 18a firmly coupled to the firing pin 14a. The firing pin 14a has two driving contours 20a, on which the driver elements 16a are mounted directly, and which are provided for driving the driver element 16a parallel to the direction of impact 18a. The driving contours 20a are made in one piece with the firing pin 14a and designed as fitting bores, which are designed as blind holes. A retaining ring 58a surrounds the spacer sleeve 24a and fixes the driver elements 16a in the fitting bores 54a. The driver elements 16a are thus provided to transfer the firing pin position to the spacer sleeve 24a and the control sleeve 22a.

Das Federelement 48a verschiebt durch die Federkraft 50a über die Steuerhülse 22a das Dämpfungselement 26a, die Abstandshülse 24a und die Mitnehmerelemente 16a bis zu einer Anschlagkontur 56a des Werkzeughalters 40a (Figur 1, unter Hälfte). In dieser Leerlaufposition 64a sind die Leerlauföffnungen 44a geöffnet und das Schlagwerk 10a befindet sich im Leerlaufbetrieb.The spring element 48a displaces by the spring force 50a via the control sleeve 22a the damping element 26a, the spacer sleeve 24a and the driver elements 16a up to a stop contour 56a of the tool holder 40a (FIG. FIG. 1 , under half). In this idling position 64a, the idling openings 44a are opened and the striking mechanism 10a is in idling operation.

Wird der Bohr- und Schlaghammer 12a vom Benutzer mit dem Werkzeug 42a gegen ein hier nicht näher dargestelltes Werkstück gedrückt, verschiebt das im Werkzeughalter 40a in und entgegen der Schlagrichtung 18a beweglich gelagerte Werkzeug 42a den Schlagbolzen 14a und die Mitnehmerelemente 16a, die Abstandshülse 24a, das Dämpfungselement 26a und die Steuerhülse 22a gegen die Federkraft 50a entgegen der Schlagrichtung 18a, bis die Steuerhülse 22a den Anschlag 52a erreicht (Figur 1, obere Hälfte). In dieser Schlagposition 66a überdeckt die Steuerhülse 22a nun die Leerlauföffnungen 44a, so dass der Kolben im Kompressionsraum 36a einen Druck erzeugen kann und der Schläger 30a durch die Druckbeaufschlagung beschleunigt werden kann. Das Schlagwerk 10a befindet sich nun im Schlagbetrieb und übt auf das Werkzeug 42a Schlagimpulse aus, sobald der Kolben durch das Exzentergetriebe mit einer zulässigen Schlagfrequenz angetrieben wird.If the drill and percussion hammer 12a is pressed by the user with the tool 42a against a workpiece which is not shown here, the tool 42a movably mounted in the tool holder 40a in and counter to the direction of impact 18a displaces the firing pin 14a and the entrainment elements 16a, the spacer sleeve 24a Damping element 26a and the control sleeve 22a against the spring force 50a against the direction of impact 18a until the control sleeve 22a reaches the stop 52a ( FIG. 1 , upper half). In this striking position 66a, the control sleeve 22a now covers the idling openings 44a, so that the piston in the compression space 36a can generate a pressure and the racket 30a can be accelerated by the pressurization. The impact mechanism 10a is now in impact mode and exerts impact pulses on the tool 42a as soon as the piston is driven by the eccentric gear with a permissible stroke frequency.

Das Dämpfungselement 26a ist dazu vorgesehen, einen Rückschlag des Schlagbolzens 14a zu dämpfen. Prallt der Schlagbolzen 14a nach einem Schlag vom Werkzeug 42a entgegen der Schlagrichtung 18a ab, wird dieser Rückschlag über die Mitnehmerelemente 16a an die Abstandshülse 24a weitergegeben. Das Dämpfungselement 26a gibt diesen Rückschlag gedämpft an die Steuerhülse 22a weiter und schützt diese so vor Beschädigungen und vermindert Vibrationen. Die nachfolgende Beschreibung und die Zeichnungen eines weiteren Ausführungsbeispiels beschränkt sich im Wesentlichen auf die Unterschiede zwischen den Ausführungsbeispielen, wobei bezüglich gleich bezeichneter Bauteile, insbesondere in Bezug auf Bauteile mit gleichen Bezugszeichen, grundsätzlich auch auf die Zeichnungen und/oder die Beschreibung der anderen Ausführungsbeispiele verwiesen werden kann. Zur Unterscheidung der Ausführungsbeispiele ist anstelle des Buchstabens a des ersten Ausführungsbeispiels der Buchstabe b des zweiten Ausführungsbeispiels nachgestellt.The damping element 26a is intended to damp a kickback of the firing pin 14a. If the firing pin 14a rebounds against the direction of impact 18a after a blow from the tool 42a, this kickback will occur passed on via the driver elements 16a to the spacer sleeve 24a. The damping element 26a gives this setback attenuated to the control sleeve 22a and thus protects them from damage and reduces vibrations. The following description and the drawings of a further embodiment are essentially limited to the differences between the exemplary embodiments, reference being made in principle also to the drawings and / or the description of the other exemplary embodiments with respect to identically named components, in particular with regard to components having the same reference numbers can. To distinguish the embodiments, instead of the letter a of the first embodiment, the letter b of the second embodiment is readjusted.

Figur 2 zeigt eine schematische Darstellung eines Ausschnitts eines Schlagwerks 10b eines Bohr- und/oder Schlaghammers 12b, mit einem Schlagbolzen 14b und mit zwei Mitnehmerelementen 16b zur Übertragung einer Schlagbolzenposition in einem zweiten Ausführungsbeispiel. Das Schlagwerk 10b unterscheidet sich vom ersten Ausführungsbeispiel insbesondere durch ein in einer Schlagrichtung 18b hinter den Mitnehmerelementen 16b angeordnetes Dämpfungselement 28b, das dazu vorgesehen ist, einen Leerschlag eines Schlägers 30b auf den Schlagbolzen 14b zu dämpfen. Wird ein Werkzeug 42b nicht oder mit nur unzureichendem Druck auf ein Werkstück gedrückt, weicht dieses dem Schlagimpuls des Schlagbolzens 14b in Schlagrichtung aus. Um den Schlagbolzen 14b zu stoppen muss seine Schlagenergie abgeleitet werden. Ein ein Hammerrohr 34b umgebendes Schlagwerkgehäuse 32b weist eine mit einem Sicherungsring 62b fixierte Anschlagscheibe 60b auf. Zwischen der Anschlagscheibe 60b und einer Abstandshülse 24b ist das als Dämpfungsring ausgebildete Dämpfungselement 28b angeordnet. Die Abstandshülse 24b stützt sich in Schlagrichtung 18b am Dämpfungselement 28b zur Dämpfung des Leerschlags ab. Das Dämpfungselement 28b zur Dämpfung des Leerschlags stützt sich in Schlagrichtung 18b über die Anschlagscheibe 60b am Schlagwerkgehäuse 32b ab. Trifft der Schläger 30b auf den Schlagbolzen 14b bewegt sich dieser in Schlagrichtung 18b. Setzt das Werkzeug 42b dem Schlagbolzen 14b keinen oder nur einen geringen Widerstand entgegen, kann sich der Schlagbolzen 14b und mit ihm die Abstandshülse 24b in Schlagrichtung bewegen. Ist der Abstand zwischen Abstandshülse 24b und Anschlagscheibe 60b geringer als die Ausdehnung des Dämpfungselements 28b in Schlagrichtung 18b in entspanntem Zustand, wird dieses Dämpfungselement 28b zwischen Abstandshülse 24b und Anschlagscheibe 60b elastisch verformt und übt auf die Abstandshülse 24b eine der Schlagrichtung 18b entgegengesetzte Rückstellkraft aus. Das Dämpfungselement 28b bremst den Schlagbolzen 14b ab und gibt den Schlagimpuls gedämpft an das Schlagwerkgehäuse 32b ab. Ein harter Aufprall des Schlagbolzens 14b an einer Anschlagkontur 56b eines Werkzeughalters 40b kann vermieden werden. Ein Kraftfluss vom Schlagbolzen 14b über die Mitnehmerelemente 16b, die Abstandshülse 24b, das Dämpfungselement 28b, die Anschlagscheibe 60b, den Sicherungsring 62b zum Schlagwerkgehäuse 32b weist eine besonders geringe Anzahl von Bauteilen und einen besonders kurzen Weg auf. Der Kraftfluss wird besonders zuverlässig weitergegeben. FIG. 2 shows a schematic representation of a section of a striking mechanism 10b of a hammer and / or percussion hammer 12b, with a firing pin 14b and with two driver elements 16b for transmitting a firing pin position in a second embodiment. The percussion mechanism 10b differs from the first exemplary embodiment in particular by a damping element 28b which is arranged behind the driver elements 16b in a direction of impact 18b and which is intended to dampen an idle impact of a racket 30b on the firing pin 14b. If a tool 42b is not pressed or with insufficient pressure on a workpiece, this deviates from the impact pulse of the firing pin 14b in the direction of impact. To stop the striker 14b, its impact energy must be dissipated. A striking mechanism housing 32b surrounding a hammer tube 34b has a stop disc 60b fixed with a securing ring 62b. Between the stopper disc 60b and a spacer sleeve 24b designed as a damping ring damping element 28b is arranged. The spacer sleeve 24b is supported in the direction of impact 18b on the damping element 28b for damping the blank. The damping element 28b for damping the idle is supported in the impact direction 18b via the stop disc 60b on the percussion mechanism housing 32b. When the racket 30b strikes the firing pin 14b, it moves in the direction of impact 18b. Sets the tool 42b the firing pin 14b little or no resistance, the striker 14b and with it the spacer sleeve 24b can move in the direction of impact. If the distance between spacer sleeve 24b and stopper disc 60b is less than the extent of the damping element 28b in the direction of impact 18b in a relaxed state, this damping element 28b is elastically deformed between the spacer sleeve 24b and the stopper disc 60b and exerts on the spacer sleeve 24b a restoring force opposing the direction of impact 18b. The damping element 28b brakes the firing pin 14b and gives the impact pulse attenuated to the striking mechanism housing 32b. A hard impact of the firing pin 14b on a stop contour 56b of a tool holder 40b can be avoided. A force flow from the firing pin 14b via the driver elements 16b, the spacer sleeve 24b, the damping element 28b, the stopper disc 60b, the circlip 62b to the hammer mechanism housing 32b has a particularly small number of components and a particularly short path. The power flow is passed on particularly reliably.

Claims (7)

  1. Percussion mechanism, in particular for a rotary and/or percussion hammer (12a, b), having a percussion pin (14a, b) and having at least one driver element (16a, b) for transferring a percussion pin position, wherein the at least one driver element (16a, b) is coupled fixedly to the percussion pin (14a, b) parallel to a percussion direction (18a, b) in and counter to the percussion direction (18a, b), and having a damping element (26a, b) arranged upstream of the at least one driver element (16a, b) in the percussion direction (18a, b), said damping element (26a, b) being intended to damp a recoil of the percussion pin (14a, b), characterized in that the at least one driver element (16a, b) is intended to transfer the percussion pin position to a control sleeve (22a, b) and a spacer sleeve (24a, b), and the damping element (26a, b) is arranged between the spacer sleeve (24a, b) and the control sleeve (22a, b) in order to damp the recoil.
  2. Percussion mechanism according to Claim 1, characterized in that the percussion pin (14a, b) has at least one entrainment contour (20a, b) on which the at least one driver element (16a, b) is directly mounted and which is intended to entrain at least one driver element (16a, b) parallel to the percussion direction (18a, b).
  3. Percussion mechanism according to Claim 1 or 2, characterized in that the at least one entrainment contour (20a, b) is embodied integrally with the percussion pin (14a, b).
  4. Percussion mechanism according to one of the preceding claims, characterized by a damping element (28b) arranged downstream of the at least one driver element (16b) in the percussion direction (18b), said damping element (28b) being intended to damp an idle stroke of a striker (30b) on the percussion pin (14b).
  5. Percussion mechanism according to Claim 4, characterized in that a spacer sleeve (24b) is supported on the damping element (28b) in the percussion direction (18b) in order to damp the idle stroke.
  6. Percussion mechanism at least according to Claim 4, characterized in that the damping element (28b) is supported on a percussion mechanism housing (32b) in the percussion direction (18b) in order to damp the idle stroke.
  7. Power tool, in particular a rotary and/or percussion hammer, having a percussion mechanism according to one of the preceding claims.
EP13163651.6A 2012-06-13 2013-04-15 Impact mechanism Not-in-force EP2674257B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012209875A DE102012209875A1 (en) 2012-06-13 2012-06-13 striking mechanism

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EP2674257A1 EP2674257A1 (en) 2013-12-18
EP2674257B1 true EP2674257B1 (en) 2016-10-26

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EP (1) EP2674257B1 (en)
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DE (1) DE102012209875A1 (en)

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Publication number Priority date Publication date Assignee Title
JP6479570B2 (en) * 2015-05-19 2019-03-06 株式会社マキタ Work tools
US20240198505A1 (en) * 2022-12-20 2024-06-20 Milwaukee Electric Tool Corporation Percussion tool

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Publication number Priority date Publication date Assignee Title
CH588632A5 (en) * 1975-03-04 1977-06-15 Bosch Gmbh Robert Impact drill with swashplate - has spring loaded pneumatic impact piston reciprocating inside tool drive sleeve
CN2376355Y (en) * 1999-04-23 2000-05-03 刘志高 Impact device for electric drill
DE10346534A1 (en) * 2003-10-07 2005-05-12 Bosch Gmbh Robert Hand tool with a striking mechanism and method for operating the power tool
SE529615C2 (en) * 2006-02-20 2007-10-09 Atlas Copco Rock Drills Ab Percussion and rock drill and method for controlling the stroke of the piston
DE102006056848A1 (en) * 2006-12-01 2008-06-05 Robert Bosch Gmbh Pneumatic impact tool for hand operated machine tool, has hammer tube and closing element directly connected with impact pin only as common sliding unit
CN101444909B (en) * 2007-11-27 2013-03-27 希尔蒂股份公司 Hand-held tool machine with pneumatic impacting device
DE102008054873A1 (en) * 2008-12-18 2010-07-01 Robert Bosch Gmbh Hand tool with counter-oscillator
DE102011007433A1 (en) * 2010-04-20 2011-12-08 Robert Bosch Gmbh Hand machine tool device
DE102010044011A1 (en) * 2010-11-16 2012-05-16 Hilti Aktiengesellschaft Hand tool

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EP2674257A1 (en) 2013-12-18
CN103481246B (en) 2017-04-19
CN103481246A (en) 2014-01-01
DE102012209875A1 (en) 2013-12-19

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