EP2855099B1 - Apparatus of hand-held machine tool - Google Patents

Apparatus of hand-held machine tool Download PDF

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Publication number
EP2855099B1
EP2855099B1 EP13723094.2A EP13723094A EP2855099B1 EP 2855099 B1 EP2855099 B1 EP 2855099B1 EP 13723094 A EP13723094 A EP 13723094A EP 2855099 B1 EP2855099 B1 EP 2855099B1
Authority
EP
European Patent Office
Prior art keywords
rotary
racket
output unit
percussion
power tool
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.)
Active
Application number
EP13723094.2A
Other languages
German (de)
French (fr)
Other versions
EP2855099A1 (en
Inventor
Tobias Herr
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 EP2855099A1 publication Critical patent/EP2855099A1/en
Application granted granted Critical
Publication of EP2855099B1 publication Critical patent/EP2855099B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/02Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
    • B25B21/026Impact clutches
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D11/00Portable percussive tools with electromotor or other motor drive
    • B25D11/06Means for driving the impulse member
    • B25D11/08Means for driving the impulse member comprising a worm mechanism, i.e. a continuous guide surface with steadily rising and falling incline
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D11/00Portable percussive tools with electromotor or other motor drive
    • B25D11/06Means for driving the impulse member
    • B25D11/10Means for driving the impulse member comprising a cam mechanism
    • B25D11/102Means for driving the impulse member comprising a cam mechanism the rotating axis of the cam member being coaxial with the axis of the tool
    • B25D11/104Means for driving the impulse member comprising a cam mechanism the rotating axis of the cam member being coaxial with the axis of the tool with rollers or balls as cam surface
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D16/00Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D16/00Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/003Clutches specially adapted therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2211/00Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/006Parallel drill and motor spindles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2216/00Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007Details of percussion or rotation modes
    • B25D2216/0023Tools having a percussion-and-rotation mode
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2216/00Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007Details of percussion or rotation modes
    • B25D2216/0038Tools having a rotation-only mode
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2250/00General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/045Cams used in percussive tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2250/00General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/231Sleeve details

Definitions

  • US 2010/0193206 A1 discloses a handheld power tool device according to the preamble of claim 1.
  • the invention provides a handheld power tool device having an output unit, a racket, a striking mechanism spring and a rotary impact receiver, which is provided to produce a rotary impact transmission between the racket and the output unit according to claim 1, at least in a rotary impact operation.
  • the hand-held power tool device has a rotary impact shut-off device, which is intended to interrupt the rotational impact transmission from the racquet to the rotary impact sensor, at least in a hammer-striking operation.
  • An "output unit” is to be understood in particular as meaning a unit which is intended to be coupled in a rotationally fixed manner with a tool chuck, in particular. Alternatively or additionally, the output unit could be at least partially formed integrally with a tool chuck.
  • the output unit has a tool feed spindle, which is intended to transmit a rotational movement to the tool chuck.
  • the tool feed spindle transmits at least one rotary impact pulse to the tool chuck.
  • the tool chuck spindle is provided to transmit at least one hammer blow pulse to the tool chuck.
  • the Output unit having a striker which is intended to transmit the hammer blow pulse to the tool chuck.
  • the racket is integrally formed.
  • the racket could be formed in several pieces.
  • a “Drehtschaufsacrificing” should be understood in particular a means to which the racket strikes in particular in a rotary impact operation directly.
  • the Drehtschaufillon in at least one operating condition, preferably at least in a rotary impact mode, rotatably connected to the output unit.
  • the Drehschlagaufillon is permanently connected rotatably connected to the output unit.
  • the rotary impact sensor could be connected to the output unit in a non-rotatable manner only in the rotary impact mode.
  • the Drehtschetzauersacrificing on a toothing engages a toothing of the racket for transmitting the rotary impact pulse.
  • a “rotary impact operation” is to be understood in particular as an operating state in which the beater transmits a series of rotational impact pulses recorded by a rotational acceleration via the rotary impact sensor to the output unit.
  • the phrase "producing a rotary impact transmission” should be understood to mean that the rotary impact sensor produces a mechanical connection in at least one operating state, by means of which the series of rotary impact pulses is transmitted from the racket to the output unit in the rotary impact operation.
  • a "Drehtschabschaltvortechnische” is to be understood in particular a device which is intended to interrupt the transmission of the series of rotary impact pulses during operation.
  • the Drehtschabschaltvorraumraum moves a rotational impact surface of the rotary impact absorber and an effective range of the racket apart in particular in the axial direction.
  • the Drehtschabschaltvorides interrupts the rotational acceleration of the racket.
  • a "hammer impact mode” is to be understood as an operating state in which the racket transmits a series of hammer impact pulses received by an acceleration in the axial direction to the output unit.
  • the phrase "interrupting a rotary impact transmission” should in particular be understood to mean that the rotary impact shut-off device is in at least one operating state, In particular, at a transition from the rotary impact operation in the hammering mode, the transmission of the series of rotational impact pulses from the racket to the output unit in particular ended secondarily.
  • the racket is intended to deliver at least one rotary impact pulse during the rotary impact operation and at least one hammer impact pulse in the direction of the power take-off unit, whereby a versatile hand tool with an advantageously small design can be achieved.
  • a "rotary impact pulse” should be understood to mean, in particular, an angular momentum which rotationally drives the output unit and in particular the tool chuck during the rotational impact operation.
  • an energy of the rotary impact pulse transmitted to the output unit is at least twice, advantageously four times as large as an energy of the hammer impact pulse transmitted to the output unit.
  • a "hammer impact impulse” should be understood to mean, in particular, an impulse acting in the axial direction which, in the hammer-striking operation, drives at least one insertion tool fastened by the tool chuck with a movement pointing away from the striker.
  • the energy of the hammer blow pulse transmitted to the output unit is at least twice, preferably four times, the energy of the rotary impact pulse transmitted to the output unit.
  • the Drehtschabschaltvorraum is provided to store the Drehtschaufrichrichrichrich axially displaceable, which structurally simple switching between the rotational impact operation and the hammer blow operation is possible.
  • axially displaceable storage that the Drehtschabschaltvortechnisch is intended to change a position of the Wheeltschetzillersacrificings relative to the output unit and / or relative to a stop position of the racket.
  • the hand-held power tool device has a racket catching device which at least temporarily fixes the racket in a rotationally fixed manner, at least during the hammer-striking operation, whereby the racket is structurally simple for generating the rotary impact pulse and for generating the hammer impact pulse can be used.
  • a "club-catching device” is to be understood in particular as a device which is intended to brake a rotary movement of the racket, in particular up to a rotational standstill.
  • the racket catching device is provided to fix the racket axially displaceable during the hammering operation rotatably.
  • the racket catching device is provided to catch the racket in an orientation in which the teeth of the racket and the teeth of the rotary racket are engaged.
  • the club catching device causes a force on the racket, which at least temporarily counteracts a rotational acceleration of the racket by a drive of the racket.
  • the bat catching device rotatably releases the bat in the circumferential direction, at least in the rotational impact operation, whereby structurally simple advantageous rotational impact operation is possible.
  • the phrase "releasable in the circumferential direction" should be understood to mean that the club-catching device lets the racket run free during the rotational-impact operation.
  • the handheld power tool device comprises a rotary drive shaft which is intended to drive the output unit in rotation, at least in a percussion drilling mode and in particular in a drilling and / or screwing mode, whereby the different operating modes can be provided in a structurally simple manner.
  • a "rotary drive shaft” should in particular be understood to mean a shaft which transmits in particular directly to the output unit a rotational movement generated by a drive unit of the hand-held power tool device.
  • a "percussion drilling mode” is to be understood as a mode in which the tool chuck rotates and drives the insert tool in a rotating operation in the axial direction.
  • the term “rotationally driving” should be understood to mean that the rotary drive shaft transmits a torque to the output unit, which drives the output unit about an axis of rotation.
  • the handheld power tool device has a rotary drive coupling, which is intended to separate the rotary drive shaft and the output unit at least in a rotary impact mode, whereby switching between the operating modes with little Effort is possible.
  • a “rotary drive coupling” should in particular be understood to mean a device which is intended to transmit a rotary movement from the rotary drive shaft, in particular directly to the output unit.
  • a "rotary impact mode” is to be understood as a mode in which the tool chuck drives the insertion tool in a circumferential direction during a working operation.
  • the tool chuck fixes the insert tool in the axial direction of the rotary impact mode.
  • the rotary drive coupling interrupts the transmission of the rotational movement of the rotary drive shaft to the output unit.
  • the racket at least substantially surrounds the rotary drive shaft on at least one plane, as a result of which a particularly small overall size can be achieved with a large racket mass.
  • the phrase "at least substantially enclosing at least one level" is intended to mean that beams radiating from an axis of the rotary drive shaft and intersecting the plane intersect the racket over an angular range of at least 180 degrees, advantageously at least 270 degrees.
  • the racket particularly advantageously surrounds the rotary drive shaft by 360 degrees.
  • the handheld power tool device comprises a racket drive shaft which at least substantially encloses the rotary drive shaft on at least one plane, whereby a compact design and a simple assembly can be achieved.
  • a "beater drive shaft” is to be understood in particular as a shaft which is intended to transmit, in particular, only one energy for the production of beats.
  • the handheld power tool device has a racket coupling, which is intended to disengage the racket, at least in a drilling mode, whereby structurally simple, the different operating modes can be provided.
  • a “racket clutch” is to be understood in particular a clutch which is intended to transmit a rotary motion to the racket drive shaft.
  • a “drilling mode” is to be understood as a mode in which the tool chuck drives the insert tool in a rotating operation, at least temporarily, in the circumferential direction during a working operation.
  • the tool chuck fixes the insert tool in the axial direction of the rotary impact mode.
  • the drilling mode can also used for screwing, to which the hand tool device preferably has a torque limiter.
  • the hand-held power tool device comprises a chisel coupling which is provided for non-rotatably fastening the output unit in a chisel mode, whereby an advantageous chiseling operation can be achieved.
  • a “chisel coupling” is to be understood in particular to mean a device which is provided for non-rotatably fastening the output unit relative to a hand tool housing.
  • a “chisel mode” is to be understood as a mode in which the tool chuck drives the insertion tool in a hammering action in the axial direction and fixes it in the circumferential direction.
  • FIG. 1 shows a hand tool 32a with a hand tool device 10a according to the invention, a drive unit 34a, a gear 36a, a tool chuck 38a, a hand tool housing 39a and a hand tool battery 40a.
  • the hand tool battery 40a provides operating power to the drive unit 34a.
  • the hand tool battery 40a is detachably connected to the hand tool housing 39a by an operator.
  • the hand tool housing 39a has a pistol-shaped basic shape.
  • the hand tool housing 39a respectively connects a part of the hand tool device 10a, the drive unit 34 and the gear 36a.
  • the tool chuck 38a is provided to fix an insert tool 42a in the axial direction and rotationally fixed.
  • the transmission 36a is provided to reduce a rotational speed of the drive unit 34a to a rotational speed of the tool chuck 38a. In this case, a translation of the transmission 36a is adjustable in two stages.
  • the drive unit 34a is provided to convert an electrical energy originating from the hand tool battery 40a into a rotary movement.
  • FIGS. 2 to 4 show the hand machine tool device 10a.
  • the handheld power tool device 10a comprises an output unit 12a.
  • the output unit 12a is connected in the axial direction and rotationally fixed to the tool chuck 38a.
  • the output unit 12a is axially displaceable and rotatably mounted in the hand tool housing 39a.
  • the output unit 12a is designed as a tool spindle.
  • the output unit 12a transmits a rotational movement, a rotary impact pulse and / or a hammer impact pulse in one operation directly on the tool chuck 38a.
  • the handheld power tool device 10a has a racket 14a and a racket drive shaft 26a.
  • the racket 14a is driven by the racket driving shaft 26a in a rotary impact operation and a hammering operation.
  • the racket drive shaft 26a is formed as a hollow shaft.
  • the racket 14a has two cam guides 44a, of which a first cam guide 44a facing the viewer is shown by a dotted line.
  • the second of the cam guides 44a is symmetrically disposed on an opposite side of the racket drive shaft 26a.
  • the cam guides 44a of the racket 14a are on an inner side the racket 14a arranged.
  • the racket driving shaft 26a has two cam guides 46a shown by a chain line.
  • the cam guides 46a of the racket driving shaft 26a are disposed on a side of the racket drive shaft 26a facing the racket 14a, that is, on an outer side of the racket drive shaft 26a.
  • the hand-held power tool device 10a comprises two connecting means 48a, which are intended to translate rotational movement of the racket drive shaft 26a into a rotary impact movement and / or a hammer-striking motion of the racket 14a. Only one of the connecting means 48a is shown. Each of the connection means 48a runs in one of the cam guides 44a of the racket 14a and in one of the cam guides 46a of the racket drive shaft 26a.
  • the hand-held power tool device 10 has a percussion spring 50a, which causes a force in the direction of the tool chuck 38a on the racket 14a.
  • the handheld power tool device 10a comprises a rotary impact receiver 16a.
  • the Drehscher Stammauer 16a is rotatably connected to the output unit 12a in the rotary impact operation.
  • a Drehtschabschaltvorraum puzzle 18a of the power tool device 10a supports the Drehschlagaufrich 16a axially displaceable.
  • the Drehschlagabschaltvortechnik 18a has a introduced in the Drehtschaufrich 16a groove and a non-illustrated, the skilled person appears appropriate mechanism for the axial displacement of the rotary impact sensor 16a.
  • the Drehschlagaufillon 16 a is shown in a shifted in the direction of the tool chuck 38 a position, that is like a hammer blow operation.
  • the rotary impact receiver 16a In the rotational impact operation, the rotary impact receiver 16a is displaced in a position in the direction of the racket 14a.
  • the Drehtschaufillon 16 a has two rotational impact surfaces 52 a, on which the beater 14 a strikes in the rotational impact operation and thereby transmits the rotary impact pulse.
  • the racket 14a is movably supported in the rotational direction in the circumferential direction.
  • the connecting means 48a move the racket 14a in a direction away from the rotary rack 16a.
  • the connecting means 48a accelerate the racket 14a in the circumferential direction.
  • the racket 14a receives the rotary impact pulse.
  • the percussion spring 50a pushes the racket 14a back towards the rotary percussion receiver 16a.
  • Rotary impact surfaces 54a of the racket 14a strike the rotary impact surfaces 52a of the rotary impact absorber 16a and transmit the rotary impact pulse to the rotary beater 16a.
  • the Drehtschaufillon 16a makes in a rotational impact operation a rotational impact transmission between the racket 14a and the output unit 12a ago by the rotational impact pulse from the racket 14a transmits to the output unit 12a.
  • the Drehtschabschaltvortechnische 18a is provided for the hammering operation to interrupt the rotational impact transmission from the racket 14a on the rotary impact receptacle 16a.
  • the Drehscherabschaltvortechnisch 18a moves the Wheelschlagierêt 16a in a position in which the rotational impact surfaces 52a of the Drehtschetzêts 16a are out of reach of the rotational impact surfaces 54a of the racket 14a arranged.
  • a racket catching device 20a of the portable power tool device 10a temporarily fixes the racket 14a in a rotationally fixed manner during the hammering operation.
  • the racket catcher 20a comprises sprung balls 53a intended to engage in an axially extending groove of the racket 14a.
  • the racket catcher 20a rotatably releases the racket 14a in the circumferential direction during the entire rotary impact operation.
  • the club-catching device 20a has a mechanism which is not shown in detail and appears to the skilled person to be useful.
  • the connecting means 48a displaces the racket 14a against the striking mechanism spring 50a in a direction away from the output unit 12a.
  • a force acting on the racket 14a by the connecting means 48a in the circumferential direction exceeds a holding force of the racket catcher 20a
  • the racket catcher 20a releases the racket 14a.
  • the striking mechanism spring 50a accelerates the racket 14a in the direction of the output unit 12a. At this time, the racket 14a rotates.
  • the racket 14a strikes a hammer-striking surface 58a of the output unit 12a with a hammer-striking surface 56a of the racket 14a. At this time, the racket 14a delivers the hammer blow pulse to the output unit 12a. Subsequently, the racket catching device 20a rotatably fixes the racket 14a again. Thus, the racket 14a is provided to deliver a rotary impact pulse in the rotary impact operation and a hammer blow pulse in the direction of the output unit 12a in the hammering operation.
  • the hand-held power tool device 10a has a rotary drive shaft 22a, which is provided to drive the output unit 12a in a percussion drilling mode and in To drive a drilling and / or screwdriving mode rotating.
  • the hand tool device 10a has a rotary drive coupling 24a, which is provided for non-rotatably connecting the rotary drive shaft 22a and the output unit 12a in the impact drilling mode and in the drilling and / or screwing mode.
  • the rotary drive clutch 24a is provided to disconnect the rotary drive shaft 22a and the output unit 12a in a spin-perch mode and in a chisel mode.
  • the beater 14a encloses the rotary drive shaft 22a on a plane perpendicular to a rotational axis of the rotary drive shaft 22a.
  • the racket drive shaft 26a encloses the rotary drive shaft 22a on a plane which is also aligned perpendicular to a rotational axis of the rotary drive shaft 22a.
  • the handheld power tool apparatus 10a includes a racket clutch 28a provided to rotationally drive the racket drive shaft 26a in the percussion drilling mode, in the chisel mode, and in the rotary impact mode.
  • the racket clutch 28a is provided to disengage the racket 14a in the drilling and / or screwing mode by disengaging the racket drive shaft 26a.
  • the racket clutch 28a here is partially formed integrally with a gear stage 60a of the power tool apparatus 10a, which is intended to increase a rotational speed of the rotary drive shaft 22a to a rotational speed of the racket drive shaft 26a.
  • a gear stage could reduce a speed of a club drive shaft to a speed of a rotary drive shaft.
  • the hand-held power tool device 10 comprises an in FIG. 2 schematically illustrated chisel coupling 30a, which is intended to rotatably fix the output unit 12a in the chisel mode.
  • FIGS. 5 and 6 a further embodiment of the invention is shown.
  • the following descriptions and the drawings are essentially limited to the differences between the embodiments, wherein with respect to identically named components, in particular with respect to components with the same reference numerals, in principle to the drawings and / or the description of the other embodiment of FIGS. 1 to 4 can be referenced.
  • To distinguish the embodiments of the letter a is the reference numerals of the embodiment in the FIGS. 1 to 4 readjusted.
  • the letter a is replaced by the letter b.
  • FIG. 5 shows a handheld power tool apparatus 10b having a power take off unit 12b, a club 14b, a rotary beater 16b, a rotary impact shutoff apparatus 18b, a club catcher 20b and a club drive shaft 26b.
  • the Drehtschabschaltvoriques 18b is intended to produce a rotational impact transmission between the racket 14b and the output unit 12b in a rotational impact operation.
  • the Drehschlagabschaltvortechnisch 18b is intended to interrupt in a hammering operation, the rotational impact transmission from the racket 14b on the rotary impact receptacle 16b.
  • FIG. 6 shows the club drive shaft 26b.
  • the racket drive shaft 26b has two cam guides 46b.
  • the cam guides 46b have the same waveform.
  • the cam guides 46b are arranged offset by 180 degrees about a rotation axis of the racket driving shaft 26b.
  • the cam guides 46b each have a spiral beater lift section 64b and a release bump section 66b.
  • the clearing area 66b connects two ends of the racket lift area 64b.
  • the cam guides 46b enclose a rotation axis of the racket driving shaft 26b by 360 degrees.
  • Two connecting means 48b are guided in the cam guides 46b. When the connecting means 48b are disposed in the clearing portions 66b, the racket 14b is movable in the axial direction.
  • the connecting means 48b are arranged in positions which are fixed relative to the racket 14b.
  • the connecting means 48b are formed as balls, which engage in recesses 62b of the racket 14b fit.
  • the beater 14b and the rotary beater 16b each have rotary beating surfaces 52b, 54b.
  • the rotary impact surfaces 52b, 54b engage in a rotary impact with each other, whereby the racket 14b is braked in the circumferential direction.
  • the connecting means 48b move the racket 14b against a striking mechanism spring 50b of the hand-held power tool device 10b in a direction away from the rotary striking receiver 16b during the rotational striking operation.
  • the connecting means 48b run into the racket lifting area 64b of the cam guides 46b.
  • the racket 14b is rotatably mounted.
  • the connecting means 48b accelerate the beater 14b in the circumferential direction.
  • the acceleration of the racket 14b in the circumferential direction depends on a steepness of the racket lift area 64b.
  • the percussion spring 50b accelerates the racket 14b axially in the direction of the output unit 12b until the rotational impact surfaces 52b, 54b meet and the Drehtschetzillon 16b transmits the rotational shock pulse in the direction of the output unit 12b.
  • the rotational impact surfaces 52b, 54b are oriented so that the transmission of the rotational impact pulse substantially stops the axial movement of the beater 14b.
  • a steepness of a racket winding area could be designed such that a rotational speed of a racket temporarily exceeds a rotational speed of a rotary drive shaft. Then the racket would be guided by a guide means in the racket hoist areas during a movement in the direction of an output unit.
  • the rotational impact surfaces 52b of the rotary impact absorber 16b are located outside a range of the rotational impact surfaces 54b of the racquet 14b.
  • the racket catcher 20b fixes the racket 14b axially displaceable and non-rotatably during the entire hammering operation.
  • the racket lifting areas 64b of the cam guides 46b move the racket 14b against the percussion spring 50b via the connecting means 48b.
  • the percussion spring 50b moves the racket 14b in the direction of the output unit 12b as soon as the connection means 48b are arranged in the clearing areas 66b.
  • a hammering surface 56b of the racket 14b transmits a hammer blow impulse to a hammering surface 58b of the output unit 12b.

Description

Stand der TechnikState of the art

Es ist bereits ein Schlagschrauber mit einer Abtriebseinheit, einem Schläger und einem Drehschlagaufnehmer, der dazu vorgesehen ist, zumindest in einem Drehschlagbetrieb eine Drehschlagübertragung zwischen dem Schläger und der Abtriebseinheit herzustellen, vorgeschlagen worden. US 2010/0193206 A1 offenbart eine Handwerkzeugmaschinenvorrichtung gemäß dem Oberbegriff des Anspruchs 1.There has already been proposed an impact wrench with an output unit, a racket and a rotary impact receiver which is intended to produce a rotary impact transmission between the racket and the output unit at least in a rotary impact operation. US 2010/0193206 A1 discloses a handheld power tool device according to the preamble of claim 1.

Offenbarung der ErfindungDisclosure of the invention

Die Erfindung stellt eine Handwerkzeugmaschinenvorrichtung mit einer Abtriebseinheit, einem Schläger, einer Schlagwerkfeder und einem Drehschlagaufnehmer, der dazu vorgesehen ist, zumindest in einem Drehschlagbetrieb eine Drehschlagübertragung zwischen dem Schläger und der Abtriebseinheit herzustellen, gemäß Anspruch 1 bereit. Die Handwerkzeugmaschinenvorrichtung weist eine Drehschlagabschaltvorrichtung auf, die dazu vorgesehen ist, zumindest in einem Hammerschlagbetrieb die Drehschlagübertragung von dem Schläger auf den Drehschlagaufnehmer zu unterbrechen. Unter einer "Abtriebseinheit" soll insbesondere eine Einheit verstanden werden, die dazu vorgesehen ist, mit einem Werkzeugfutter insbesondere drehfest gekoppelt zu werden. Alternativ oder zusätzlich könnte die Abtriebseinheit zumindest teilweise einstückig mit einem Werkzeugfutter ausgebildet sein. Vorzugsweise weist die Abtriebseinheit eine Werkzeugfutterspindel auf, die dazu vorgesehen ist, eine Drehbewegung auf das Werkzeugfutter zu übertragen. Vorteilhaft überträgt die Werkzeugfutterspindel zumindest einen Drehschlagimpuls auf das Werkzeugfutter. Bevorzugt ist die Werkzeugfutterspindel dazu vorgesehen, zumindest einen Hammerschlagimpuls auf das Werkzeugfutter zu übertragen. Alternativ könnte die Abtriebseinheit einen Döpper aufweisen, der dazu vorgesehen ist, den Hammerschlagimpuls auf das Werkzeugfutter zu übertragen. Insbesondere soll unter dem Begriff "Schläger" ein Mittel verstanden werden, das zumindest bei einem Drehschlagbetrieb zumindest rotatorisch und/oder bei einem Hammerschlagbetrieb zumindest translatorisch beschleunigt wird und einen bei der Beschleunigung aufgenommenen Impuls als Drehschlagimpuls und/oder als Hammerschlagimpuls in Richtung einer Abtriebseinheit abgibt. Vorzugsweise ist der Schläger einstückig ausgebildet. Alternativ könnte der Schläger mehrstückig ausgebildet sein. Unter einem "Drehschlagaufnehmer" soll insbesondere ein Mittel verstanden werden, auf das der Schläger bei einem Drehschlagbetrieb insbesondere direkt schlägt. Vorzugsweise ist der Drehschlagaufnehmer in zumindest einem Betriebszustand, vorzugsweise zumindest in einem Drehschlagmodus, drehfest mit der Abtriebseinheit verbunden. Vorteilhaft ist der Drehschlagaufnehmer permanent drehfest mit der Abtriebseinheit verbunden. Alternativ könnte der Drehschlagaufnehmer nur in dem Drehschlagmodus drehfest mit der Abtriebseinheit verbunden sein. Vorzugsweise weist der Drehschlagaufnehmer eine Zahnung auf, in die bei dem Drehschlagbetrieb eine Zahnung des Schlägers zur Übertragung des Drehschlagimpulses greift. Insbesondere soll unter "vorgesehen" speziell ausgestattet und/oder ausgelegt verstanden werden. Unter einem "Drehschlagbetrieb" soll insbesondere ein Betriebszustand verstanden werden, bei dem der Schläger eine Serie von durch eine Drehbeschleunigung aufgenommenen Drehschlagimpulsen über den Drehschlagaufnehmer an die Abtriebseinheit überträgt. Insbesondere soll unter der Wendung "eine Drehschlagübertragung herstellen" verstanden werden, dass der Drehschlagaufnehmer in zumindest einem Betriebszustand eine mechanische Verbindung herstellt, über die die Serie der Drehschlagimpulse bei dem Drehschlagbetrieb von dem Schläger auf die Abtriebseinheit übertragen wird. Unter einer "Drehschlagabschaltvorrichtung" soll insbesondere eine Vorrichtung verstanden werden, die dazu vorgesehen ist, die Übertragung der Serie der Drehschlagimpulse bei einem Betrieb zu unterbrechen. Vorzugsweise bewegt die Drehschlagabschaltvorrichtung eine Drehschlagfläche des Drehschlagaufnehmers und einen Wirkbereich des Schlägers insbesondere in axialer Richtung auseinander. Alternativ oder zusätzlich unterbricht die Drehschlagabschaltvorrichtung die Drehbeschleunigung des Schlägers. Insbesondere soll unter einem "Hammerschlagbetrieb" ein Betriebszustand verstanden werden, bei dem der Schläger eine Serie von durch eine Beschleunigung in axialer Richtung aufgenommenen Hammerschlagimpulsen an die Abtriebseinheit überträgt. Unter der Wendung "eine Drehschlagübertragung unterbrechen" soll insbesondere verstanden werden, dass die Drehschlagabschaltvorrichtung in zumindest einem Betriebszustand, vorzugsweise bei einem Übergang von dem Drehschlagbetrieb in den Hammerschlagbetrieb, die Übertragung der Serie von Drehschlagimpulsen von dem Schläger auf die Abtriebseinheit insbesondere zweitweise beendet. Durch die erfindungsgemäße Ausgestaltung der Handwerkzeugmaschinenvorrichtung kann konstruktiv eine besonders vielfältig einsetzbare Handwerkzeugmaschine bereitgestellt werden. Erfindungsgemäß ist der Schläger dazu vorgesehen, bei dem Drehschlagbetrieb zumindest einen Drehschlagimpuls und bei dem Hammerschlagbetrieb zumindest einen Hammerschlagimpuls in Richtung der Abtriebseinheit abzugeben, wodurch eine vielfältig einsetzbare Handwerkzeugmaschine mit einer vorteilhaft kleinen Bauform erreicht werden kann. Unter einem "Drehschlagimpuls" soll insbesondere ein Drehimpuls verstanden werden, der bei dem Drehschlagbetrieb die Abtriebseinheit und insbesondere das Werkzeugfutter drehend antreibt. Vorzugsweise ist bei dem Drehschlagbetrieb eine auf die Abtriebseinheit übertragene Energie des Drehschlagimpulses wenigstens doppelt, vorteilhaft vier Mal so groß wie eine auf die Abtriebseinheit übertragene Energie des Hammerschlagimpulses. Unter einem "Hammerschlagimpuls" soll insbesondere ein in axialer Richtung wirkender Impuls verstanden werden, der bei dem Hammerschlagbetrieb zumindest ein von dem Werkzeugfutter befestigtes Einsatzwerkzeug mit einer von dem Schläger weg weisenden Bewegung antreibt. Vorzugsweise ist bei dem Hammerschlagbetrieb die auf die Abtriebseinheit übertragene Energie des Hammerschlagimpulses wenigstens doppelt, bevorzugt vier Mal so groß wie die auf die Abtriebseinheit übertragene Energie des Drehschlagimpulses.The invention provides a handheld power tool device having an output unit, a racket, a striking mechanism spring and a rotary impact receiver, which is provided to produce a rotary impact transmission between the racket and the output unit according to claim 1, at least in a rotary impact operation. The hand-held power tool device has a rotary impact shut-off device, which is intended to interrupt the rotational impact transmission from the racquet to the rotary impact sensor, at least in a hammer-striking operation. An "output unit" is to be understood in particular as meaning a unit which is intended to be coupled in a rotationally fixed manner with a tool chuck, in particular. Alternatively or additionally, the output unit could be at least partially formed integrally with a tool chuck. Preferably, the output unit has a tool feed spindle, which is intended to transmit a rotational movement to the tool chuck. Advantageously, the tool feed spindle transmits at least one rotary impact pulse to the tool chuck. Preferably, the tool chuck spindle is provided to transmit at least one hammer blow pulse to the tool chuck. Alternatively, the Output unit having a striker, which is intended to transmit the hammer blow pulse to the tool chuck. In particular, the term "bat" is to be understood as a means which is at least rotationally at least rotationally and / or accelerated at Hammerschlagbetrieb translationally and emits a recorded during the acceleration pulse as a rotary impact pulse and / or as a hammer blow pulse in the direction of an output unit. Preferably, the racket is integrally formed. Alternatively, the racket could be formed in several pieces. By a "Drehschlagaufnehmer" should be understood in particular a means to which the racket strikes in particular in a rotary impact operation directly. Preferably, the Drehschlagaufnehmer in at least one operating condition, preferably at least in a rotary impact mode, rotatably connected to the output unit. Advantageously, the Drehschlagaufnehmer is permanently connected rotatably connected to the output unit. Alternatively, the rotary impact sensor could be connected to the output unit in a non-rotatable manner only in the rotary impact mode. Preferably, the Drehschlagaufnehmer on a toothing, in the case of the rotational impact operation engages a toothing of the racket for transmitting the rotary impact pulse. In particular, should be understood as "provided" specially equipped and / or designed. A "rotary impact operation" is to be understood in particular as an operating state in which the beater transmits a series of rotational impact pulses recorded by a rotational acceleration via the rotary impact sensor to the output unit. In particular, the phrase "producing a rotary impact transmission" should be understood to mean that the rotary impact sensor produces a mechanical connection in at least one operating state, by means of which the series of rotary impact pulses is transmitted from the racket to the output unit in the rotary impact operation. A "Drehschlagabschaltvorrichtung" is to be understood in particular a device which is intended to interrupt the transmission of the series of rotary impact pulses during operation. Preferably, the Drehschlagabschaltvorrichtung moves a rotational impact surface of the rotary impact absorber and an effective range of the racket apart in particular in the axial direction. Alternatively or additionally, the Drehschlagabschaltvorrichtung interrupts the rotational acceleration of the racket. In particular, a "hammer impact mode" is to be understood as an operating state in which the racket transmits a series of hammer impact pulses received by an acceleration in the axial direction to the output unit. The phrase "interrupting a rotary impact transmission" should in particular be understood to mean that the rotary impact shut-off device is in at least one operating state, In particular, at a transition from the rotary impact operation in the hammering mode, the transmission of the series of rotational impact pulses from the racket to the output unit in particular ended secondarily. By virtue of the embodiment of the handheld power tool device according to the invention, it is possible to constructively provide a particularly versatile handheld power tool. According to the invention, the racket is intended to deliver at least one rotary impact pulse during the rotary impact operation and at least one hammer impact pulse in the direction of the power take-off unit, whereby a versatile hand tool with an advantageously small design can be achieved. A "rotary impact pulse" should be understood to mean, in particular, an angular momentum which rotationally drives the output unit and in particular the tool chuck during the rotational impact operation. Preferably, in the rotational impact operation, an energy of the rotary impact pulse transmitted to the output unit is at least twice, advantageously four times as large as an energy of the hammer impact pulse transmitted to the output unit. A "hammer impact impulse" should be understood to mean, in particular, an impulse acting in the axial direction which, in the hammer-striking operation, drives at least one insertion tool fastened by the tool chuck with a movement pointing away from the striker. Preferably, in the hammering mode, the energy of the hammer blow pulse transmitted to the output unit is at least twice, preferably four times, the energy of the rotary impact pulse transmitted to the output unit.

Des Weiteren wird vorzugsweise vorgeschlagen, dass die Drehschlagabschaltvorrichtung dazu vorgesehen ist, den Drehschlagaufnehmer axial verschiebbar zu lagern, wodurch konstruktiv einfach eine Umschaltung zwischen dem Drehschlagbetrieb und dem Hammerschlagbetrieb möglich ist. Insbesondere soll unter "axial verschiebbar lagern" verstanden werden, dass die Drehschlagabschaltvorrichtung dazu vorgesehen ist, eine Position des Drehschlagaufnehmers relativ zu der Abtriebseinheit und/oder relativ zu einer Anschlagsposition des Schlägers zu verändern.Furthermore, it is preferably proposed that the Drehschlagabschaltvorrichtung is provided to store the Drehschlagaufnehmer axially displaceable, which structurally simple switching between the rotational impact operation and the hammer blow operation is possible. In particular, should be understood by "axially displaceable storage" that the Drehschlagabschaltvorrichtung is intended to change a position of the Drehschlagaufnehmers relative to the output unit and / or relative to a stop position of the racket.

Ferner wird vorzugsweise vorgeschlagen, dass die Handwerkzeugmaschinenvorrichtung eine Schlägerfangvorrichtung aufweist, die den Schläger zumindest bei dem Hammerschlagbetrieb zumindest zeitweise drehfest befestigt, wodurch der Schläger konstruktiv einfach zur Erzeugung des Drehschlagimpulses und zur Erzeugung des Hammerschlagimpulses verwendet werden kann. Unter einer "Schlägerfangvorrichtung" soll insbesondere eine Vorrichtung verstanden werden, die dazu vorgesehen ist, eine Drehbewegung des Schlägers, insbesondere bis zu einem rotatorischen Stillstand, zu bremsen. Vorzugsweise ist die Schlägerfangvorrichtung dazu vorgesehen, den Schläger bei dem Hammerschlagbetrieb axial verschiebbar drehfest zu befestigen. In einer Ausgestaltung ist die Schlägerfangvorrichtung dazu vorgesehen, den Schläger in einer Ausrichtung zu fangen, bei der die Zahnung des Schlägers und die Zahnung des Drehschlagaufnehmers in Eingriff stehen. Insbesondere soll unter "drehfest befestigen" verstanden werden, dass die Schlägerfangvorrichtung auf den Schläger eine Kraft bewirkt, die einer Rotationsbeschleunigung des Schlägers durch einen Antrieb des Schlägers zumindest zeitweise entgegenwirkt.Furthermore, it is preferably proposed that the hand-held power tool device has a racket catching device which at least temporarily fixes the racket in a rotationally fixed manner, at least during the hammer-striking operation, whereby the racket is structurally simple for generating the rotary impact pulse and for generating the hammer impact pulse can be used. A "club-catching device" is to be understood in particular as a device which is intended to brake a rotary movement of the racket, in particular up to a rotational standstill. Preferably, the racket catching device is provided to fix the racket axially displaceable during the hammering operation rotatably. In one embodiment, the racket catching device is provided to catch the racket in an orientation in which the teeth of the racket and the teeth of the rotary racket are engaged. In particular, should be understood by "non-rotatably fastened" that the club catching device causes a force on the racket, which at least temporarily counteracts a rotational acceleration of the racket by a drive of the racket.

Zudem wird vorzugsweise vorgeschlagen, dass die Schlägerfangvorrichtung den Schläger zumindest bei dem Drehschlagbetrieb in Umfangsrichtung drehbar freigibt, wodurch konstruktiv einfach ein vorteilhafter Drehschlagbetrieb möglich ist. Insbesondere soll unter der Wendung "in Umfangsrichtung drehbar freigeben" verstanden werden, dass die Schlägerfangvorrichtung bei dem Drehschlagbetrieb den Schläger frei laufen lässt.In addition, it is preferably proposed that the bat catching device rotatably releases the bat in the circumferential direction, at least in the rotational impact operation, whereby structurally simple advantageous rotational impact operation is possible. In particular, the phrase "releasable in the circumferential direction" should be understood to mean that the club-catching device lets the racket run free during the rotational-impact operation.

Weiterhin wird vorzugsweise vorgeschlagen, dass die Handwerkzeugmaschinenvorrichtung eine Drehantriebswelle umfasst, die dazu vorgesehen ist, die Abtriebseinheit zumindest in einem Schlagbohrmodus und insbesondere in einem Bohr- und/oder Schraubmodus drehend anzutreiben, wodurch konstruktiv einfach die unterschiedlichen Betriebsmodi bereitgestellt werden können. Unter einer "Drehantriebswelle" soll insbesondere eine Welle verstanden werden, die eine von einer Antriebseinheit der Handwerkzeugmaschinenvorrichtung erzeugte Rotationsbewegung insbesondere direkt auf die Abtriebseinheit überträgt. Insbesondere soll unter einem "Schlagbohrmodus" ein Modus verstanden werden, in dem das Werkzeugfutter das Einsatzwerkzeug bei einem Arbeitsvorgang drehend und in axialer Richtung schlagend antreibt. Insbesondere soll unter "drehend antreiben" verstanden werden, dass die Drehantriebswelle ein Drehmoment auf die Abtriebseinheit überträgt, das die Abtriebseinheit um eine Drehachse bewegt antreibt.
In einer vorteilhaften Ausbildung der Erfindung wird vorgeschlagen, dass die Handwerkzeugmaschinenvorrichtung eine Drehantriebkupplung aufweist, die dazu vorgesehen ist, die Drehantriebswelle und die Abtriebseinheit zumindest in einem Drehschlagmodus zu trennen, wodurch ein Umschalten zwischen den Betriebsmodi mit wenig Aufwand möglich ist. Unter einer "Drehantriebkupplung" soll insbesondere eine Vorrichtung verstanden werden, die dazu vorgesehen ist, eine Drehbewegung von der Drehantriebswelle insbesondere direkt auf die Abtriebseinheit zu übertragen. Insbesondere soll unter einem "Drehschlagmodus" ein Modus verstanden werden, in dem das Werkzeugfutter das Einsatzwerkzeug bei einem Arbeitsvorgang in Umfangsrichtung schlagend antreibt. Vorzugsweise fixiert das Werkzeugfutter das Einsatzwerkzeug in dem Drehschlagmodus in axialer Richtung. Unter "trennen" soll in diesem Zusammenhang insbesondere verstanden werden, dass die Drehantriebkupplung die Übertragung der Drehbewegung von der Drehantriebswelle auf die Abtriebseinheit unterbricht.
Furthermore, it is preferably proposed that the handheld power tool device comprises a rotary drive shaft which is intended to drive the output unit in rotation, at least in a percussion drilling mode and in particular in a drilling and / or screwing mode, whereby the different operating modes can be provided in a structurally simple manner. A "rotary drive shaft" should in particular be understood to mean a shaft which transmits in particular directly to the output unit a rotational movement generated by a drive unit of the hand-held power tool device. In particular, a "percussion drilling mode" is to be understood as a mode in which the tool chuck rotates and drives the insert tool in a rotating operation in the axial direction. In particular, the term "rotationally driving" should be understood to mean that the rotary drive shaft transmits a torque to the output unit, which drives the output unit about an axis of rotation.
In an advantageous embodiment of the invention, it is proposed that the handheld power tool device has a rotary drive coupling, which is intended to separate the rotary drive shaft and the output unit at least in a rotary impact mode, whereby switching between the operating modes with little Effort is possible. A "rotary drive coupling" should in particular be understood to mean a device which is intended to transmit a rotary movement from the rotary drive shaft, in particular directly to the output unit. In particular, a "rotary impact mode" is to be understood as a mode in which the tool chuck drives the insertion tool in a circumferential direction during a working operation. Preferably, the tool chuck fixes the insert tool in the axial direction of the rotary impact mode. By "separate" is to be understood in this context, in particular, that the rotary drive coupling interrupts the transmission of the rotational movement of the rotary drive shaft to the output unit.

Des Weiteren wird vorzugsweise vorgeschlagen, dass der Schläger die Drehantriebswelle auf wenigstens einer Ebene zumindest im Wesentlichen umschließt, wodurch eine besonders geringe Baugröße bei einer großen Schlägermasse erreicht werden kann. Insbesondere soll unter der Wendung "auf wenigstens einer Ebene zumindest im Wesentlichen umschließen" verstanden werden, dass von einer Achse der Drehantriebswelle ausgehende Strahlen, die auf der Ebene angeordnet sind, den Schläger über einem Winkelbereich von wenigstens 180 Grad, vorteilhaft wenigstens 270 Grad schneiden. Besonders vorteilhaft umschließt der Schläger die Drehantriebswelle um 360 Grad.Furthermore, it is preferably proposed that the racket at least substantially surrounds the rotary drive shaft on at least one plane, as a result of which a particularly small overall size can be achieved with a large racket mass. In particular, the phrase "at least substantially enclosing at least one level" is intended to mean that beams radiating from an axis of the rotary drive shaft and intersecting the plane intersect the racket over an angular range of at least 180 degrees, advantageously at least 270 degrees. The racket particularly advantageously surrounds the rotary drive shaft by 360 degrees.

Ferner wird vorzugsweise vorgeschlagen, dass die Handwerkzeugmaschinenvorrichtung eine Schlägerantriebswelle umfasst, die die Drehantriebswelle auf wenigstens einer Ebene zumindest im Wesentlichen umschließt, wodurch eine kompakte Bauform und ein einfacher Zusammenbau erreicht werden können. Unter einer "Schlägerantriebswelle" soll insbesondere eine Welle verstanden werden, die dazu vorgesehen ist, insbesondere nur eine Energie zur Schlagerzeugung zu übertragen.Furthermore, it is preferably proposed that the handheld power tool device comprises a racket drive shaft which at least substantially encloses the rotary drive shaft on at least one plane, whereby a compact design and a simple assembly can be achieved. A "beater drive shaft" is to be understood in particular as a shaft which is intended to transmit, in particular, only one energy for the production of beats.

Zudem wird vorzugsweise vorgeschlagen, dass die Handwerkzeugmaschinenvorrichtung eine Schlägerkupplung aufweist, die dazu vorgesehen ist, den Schläger zumindest in einem Bohrmodus auszukuppeln, wodurch konstruktiv einfach die unterschiedlichen Betriebsmodi bereitgestellt werden können. Unter einer "Schlägerkupplung" soll insbesondere eine Kupplung verstanden werden, die dazu vorgesehen ist, eine Drehbewegung auf die Schlägerantriebswelle zu übertragen. Insbesondere soll unter einem "Bohrmodus" ein Modus verstanden werden, in dem das Werkzeugfutter das Einsatzwerkzeug bei einem Arbeitsvorgang in Umfangsrichtung zumindest zeitweise stetig drehend antreibt. Vorzugsweise fixiert das Werkzeugfutter das Einsatzwerkzeug in dem Drehschlagmodus in axialer Richtung. Vorzugsweise kann der Bohrmodus auch zum Schrauben verwendet werden, wozu die Handwerkzeugmaschinenvorrichtung vorzugsweise eine Drehmomentbegrenzung aufweist.In addition, it is preferably proposed that the handheld power tool device has a racket coupling, which is intended to disengage the racket, at least in a drilling mode, whereby structurally simple, the different operating modes can be provided. A "racket clutch" is to be understood in particular a clutch which is intended to transmit a rotary motion to the racket drive shaft. In particular, a "drilling mode" is to be understood as a mode in which the tool chuck drives the insert tool in a rotating operation, at least temporarily, in the circumferential direction during a working operation. Preferably, the tool chuck fixes the insert tool in the axial direction of the rotary impact mode. Preferably, the drilling mode can also used for screwing, to which the hand tool device preferably has a torque limiter.

Weiterhin wird vorzugsweise vorgeschlagen, dass die Handwerkzeugmaschinenvorrichtung eine Meißelkupplung umfasst, die dazu vorgesehen ist, die Abtriebseinheit in einem Meißelmodus drehfest zu befestigen, wodurch ein vorteilhafter Meißelbetrieb erreicht werden kann. Unter einer "Meißelkupplung" soll insbesondere eine Vorrichtung verstanden werden, die dazu vorgesehen ist, die Abtriebseinheit relativ zu einem Handwerkzeuggehäuse drehfest zu befestigen. Insbesondere soll unter einem "Meißelmodus" ein Modus verstanden werden, in dem das Werkzeugfutter das Einsatzwerkzeug bei einem Arbeitsvorgang in axialer Richtung schlagend antreibt und in Umfangsrichtung fixiert.Furthermore, it is preferably proposed that the hand-held power tool device comprises a chisel coupling which is provided for non-rotatably fastening the output unit in a chisel mode, whereby an advantageous chiseling operation can be achieved. A "chisel coupling" is to be understood in particular to mean a device which is provided for non-rotatably fastening the output unit relative to a hand tool housing. In particular, a "chisel mode" is to be understood as a mode in which the tool chuck drives the insertion tool in a hammering action in the axial direction and fixes it in the circumferential direction.

Zeichnungdrawing

Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung sind zwei Ausführungsbeispiele der Erfindung dargestellt.Further advantages emerge from the following description of the drawing. In the drawing, two embodiments of the invention are shown.

Es zeigen:

Fig. 1
eine Handwerkzeugmaschine mit einer erfindungsgemäßen Handwerkzeugmaschinenvorrichtung in einer schematischen Schnittdarstellung,
Fig. 2
die Handwerkzeugmaschinenvorrichtung aus Figur 1 in einer teilweise schematischen Seitenansicht,
Fig. 3
die Handwerkzeugmaschinenvorrichtung aus Figur 1 in einer Frontaldarstellung,
Fig. 4
eine Schlägerantriebswelle der Handwerkzeugmaschinenvorrichtung aus Figur 1 in einer Seitenansicht,
Fig. 5
eine alternative Ausführungsform der Handwerkzeugmaschinenvorrichtung aus Figur 1 in einer teilweise schematischen Seitenansicht und
Fig. 6
eine Schlägerantriebswelle der Handwerkzeugmaschinenvorrichtung aus Figur 5 in einer Seitenansicht.
Show it:
Fig. 1
a hand tool with a hand tool device according to the invention in a schematic sectional view,
Fig. 2
the handheld power tool device FIG. 1 in a partially schematic side view,
Fig. 3
the handheld power tool device FIG. 1 in a frontal view,
Fig. 4
a club drive shaft of the power tool device FIG. 1 in a side view,
Fig. 5
an alternative embodiment of the hand tool device from FIG. 1 in a partially schematic side view and
Fig. 6
a club drive shaft of the power tool device FIG. 5 in a side view.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Figur 1 zeigt eine Handwerkzeugmaschine 32a mit einer erfindungsgemäßen Handwerkzeugmaschinenvorrichtung 10a, einer Antriebseinheit 34a, einem Getriebe 36a, einem Werkzeugfutter 38a, einem Handwerkzeuggehäuse 39a und einem Handwerkzeugakku 40a. Der Handwerkzeugakku 40a stellt der Antriebseinheit 34a eine Betriebsenergie zur Verfügung. Der Handwerkzeugakku 40a ist von einem Bediener lösbar mit dem Handwerkzeuggehäuse 39a verbunden. Das Handwerkzeuggehäuse 39a weist eine pistolenförmige Grundform auf. Das Handwerkzeuggehäuse 39a verbindet jeweils einen Teil der Handwerkzeugmaschinenvorrichtung 10a, der Antriebseinheit 34 und des Getriebes 36a. Das Werkzeugfutter 38a ist dazu vorgesehen, ein Einsatzwerkzeug 42a in axialer Richtung und drehfest zu befestigen. Das Getriebe 36a ist dazu vorgesehen, eine Drehzahl der Antriebseinheit 34a auf eine Drehzahl des Werkzeugfutters 38a zu reduzieren. Dabei ist eine Übersetzung des Getriebes 36a in zwei Stufen einstellbar. Die Antriebseinheit 34a ist dazu vorgesehen, eine von dem Handwerkzeugakku 40a stammende elektrische Energie in eine Drehbewegung zu wandeln. FIG. 1 shows a hand tool 32a with a hand tool device 10a according to the invention, a drive unit 34a, a gear 36a, a tool chuck 38a, a hand tool housing 39a and a hand tool battery 40a. The hand tool battery 40a provides operating power to the drive unit 34a. The hand tool battery 40a is detachably connected to the hand tool housing 39a by an operator. The hand tool housing 39a has a pistol-shaped basic shape. The hand tool housing 39a respectively connects a part of the hand tool device 10a, the drive unit 34 and the gear 36a. The tool chuck 38a is provided to fix an insert tool 42a in the axial direction and rotationally fixed. The transmission 36a is provided to reduce a rotational speed of the drive unit 34a to a rotational speed of the tool chuck 38a. In this case, a translation of the transmission 36a is adjustable in two stages. The drive unit 34a is provided to convert an electrical energy originating from the hand tool battery 40a into a rotary movement.

Figur 2 bis 4 zeigen die Handwerkzeugmaschinenvorrichtung 10a. Die Handwerkzeugmaschinenvorrichtung 10a umfasst eine Abtriebseinheit 12a. Die Abtriebseinheit 12a ist in axialer Richtung und drehfest mit dem Werkzeugfutter 38a verbunden. Die Abtriebseinheit 12a ist axial verschiebbar und drehbar in dem Handwerkzeuggehäuse 39a gelagert. Die Abtriebseinheit 12a ist als eine Werkzeugspindel ausgebildet. Die Abtriebseinheit 12a überträgt eine Drehbewegung, einen Drehschlagimpuls und/oder einen Hammerschlagimpuls bei einem Arbeitsvorgang direkt auf das Werkzeugfutter 38a. FIGS. 2 to 4 show the hand machine tool device 10a. The handheld power tool device 10a comprises an output unit 12a. The output unit 12a is connected in the axial direction and rotationally fixed to the tool chuck 38a. The output unit 12a is axially displaceable and rotatably mounted in the hand tool housing 39a. The output unit 12a is designed as a tool spindle. The output unit 12a transmits a rotational movement, a rotary impact pulse and / or a hammer impact pulse in one operation directly on the tool chuck 38a.

Die Handwerkzeugmaschinenvorrichtung 10a weist einen Schläger 14a und eine Schlägerantriebswelle 26a auf. Der Schläger 14a wird bei einem Drehschlagbetrieb und bei einem Hammerschlagbetrieb von der Schlägerantriebswelle 26a angetrieben. Die Schlägerantriebswelle 26a ist als eine Hohlwelle ausgebildet. Der Schläger 14a weist zwei Kurvenführungen 44a auf, von denen eine erste dem Betrachter zugewandte Kurvenführung 44a durch eine Punktlinie dargestellte ist. Die zweite der Kurvenführungen 44a ist symmetrisch auf einer gegenüberliegenden Seite der Schlägerantriebswelle 26a angeordnet. Die Kurvenführungen 44a des Schlägers 14a sind auf einer Innenseite des Schlägers 14a angeordnet. Die Schlägerantriebswelle 26a weist zwei mit einer Strichpunktlinie dargestellte Kurvenführungen 46a auf. Die Kurvenführungen 46a der Schlägerantriebswelle 26a sind auf einer dem Schläger 14a zugewandten Seite der Schlägerantriebswelle 26a, also auf einer Außenseite der Schlägerantriebswelle 26a, angeordnet.The handheld power tool device 10a has a racket 14a and a racket drive shaft 26a. The racket 14a is driven by the racket driving shaft 26a in a rotary impact operation and a hammering operation. The racket drive shaft 26a is formed as a hollow shaft. The racket 14a has two cam guides 44a, of which a first cam guide 44a facing the viewer is shown by a dotted line. The second of the cam guides 44a is symmetrically disposed on an opposite side of the racket drive shaft 26a. The cam guides 44a of the racket 14a are on an inner side the racket 14a arranged. The racket driving shaft 26a has two cam guides 46a shown by a chain line. The cam guides 46a of the racket driving shaft 26a are disposed on a side of the racket drive shaft 26a facing the racket 14a, that is, on an outer side of the racket drive shaft 26a.

Die Handwerkzeugmaschinenvorrichtung 10a umfasst zwei Verbindungsmittel 48a, die dazu vorgesehen sind, Drehbewegung der Schlägerantriebswelle 26a in eine Drehschlagbewegung und/oder eine Hammerschlagbewegung des Schläger 14a zu übersetzen. Nur eines der Verbindungsmittel 48a ist dargestellt. Jedes der Verbindungsmittel 48a läuft in einer der Kurvenführungen 44a des Schlägers 14a und in einer der Kurvenführungen 46a der Schlägerantriebswelle 26a. Die Handwerkzeugmaschinenvorrichtung 10 weist eine Schlagwerkfeder 50a auf, die eine Kraft in Richtung des Werkzeugfutters 38a auf den Schläger 14a bewirkt.The hand-held power tool device 10a comprises two connecting means 48a, which are intended to translate rotational movement of the racket drive shaft 26a into a rotary impact movement and / or a hammer-striking motion of the racket 14a. Only one of the connecting means 48a is shown. Each of the connection means 48a runs in one of the cam guides 44a of the racket 14a and in one of the cam guides 46a of the racket drive shaft 26a. The hand-held power tool device 10 has a percussion spring 50a, which causes a force in the direction of the tool chuck 38a on the racket 14a.

Die Handwerkzeugmaschinenvorrichtung 10a umfasst einen Drehschlagaufnehmer 16a. Der Drehschlagaufnehmer 16a ist bei dem Drehschlagbetrieb drehfest mit der Abtriebseinheit 12a verbunden. Eine Drehschlagabschaltvorrichtung 18a der Handwerkzeugmaschinenvorrichtung 10a lagert den Drehschlagaufnehmer 16a axial verschiebbar. Die Drehschlagabschaltvorrichtung 18a weist eine in dem Drehschlagaufnehmer 16a eingebrachte Nut und einen nicht näher dargestellten, dem Fachmann als sinnvoll erscheinenden Mechanismus zur axialen Verschiebung des Drehschlagaufnehmers 16a auf. Der Drehschlagaufnehmer 16a ist in einer in Richtung des Werkzeugfutter 38a verschobenen Position dargestellt, das heißt wie bei einem Hammerschlagbetrieb. Bei dem Drehschlagbetrieb ist der Drehschlagaufnehmer 16a in eine in Richtung des Schlägers 14a gelegene Position verschoben. Der Drehschlagaufnehmer 16a weist zwei Drehschlagflächen 52a auf, auf die der Schläger 14a beim Drehschlagbetrieb schlägt und dabei den Drehschlagimpuls überträgt.The handheld power tool device 10a comprises a rotary impact receiver 16a. The Drehschlagaufnehmer 16a is rotatably connected to the output unit 12a in the rotary impact operation. A Drehschlagabschaltvorrichtung 18a of the power tool device 10a supports the Drehschlagaufnehmer 16a axially displaceable. The Drehschlagabschaltvorrichtung 18a has a introduced in the Drehschlagaufnehmer 16a groove and a non-illustrated, the skilled person appears appropriate mechanism for the axial displacement of the rotary impact sensor 16a. The Drehschlagaufnehmer 16 a is shown in a shifted in the direction of the tool chuck 38 a position, that is like a hammer blow operation. In the rotational impact operation, the rotary impact receiver 16a is displaced in a position in the direction of the racket 14a. The Drehschlagaufnehmer 16 a has two rotational impact surfaces 52 a, on which the beater 14 a strikes in the rotational impact operation and thereby transmits the rotary impact pulse.

Der Schläger 14a ist bei dem Drehschlagbetrieb in Umfangsrichtung bewegbar gelagert. Bei dem Drehschlagbetrieb bewegen die Verbindungsmittel 48a den Schläger 14a in eine von dem Drehschlagaufnehmer 16a weg gewandte Richtung. Dabei beschleunigen die Verbindungsmittel 48a den Schläger 14a in Umfangsrichtung. Der Schläger 14a nimmt den Drehschlagimpuls auf. Die Schlagwerkfeder 50a drückt den Schläger 14a zurück in Richtung des Drehschlagaufnehmers 16a. Drehschlagflächen 54a des Schlägers 14a treffen auf die Drehschlagflächen 52a des Drehschlagaufnehmers 16a und übertragen den Drehschlagimpuls auf den Drehschlagaufnehmer 16a. Der Drehschlagaufnehmer 16a stellt in einem Drehschlagbetrieb eine Drehschlagübertragung zwischen dem Schläger 14a und der Abtriebseinheit 12a her, indem er den Drehschlagimpuls von dem Schläger 14a auf die Abtriebseinheit 12a überträgt.The racket 14a is movably supported in the rotational direction in the circumferential direction. In the rotational operation, the connecting means 48a move the racket 14a in a direction away from the rotary rack 16a. The connecting means 48a accelerate the racket 14a in the circumferential direction. The racket 14a receives the rotary impact pulse. The percussion spring 50a pushes the racket 14a back towards the rotary percussion receiver 16a. Rotary impact surfaces 54a of the racket 14a strike the rotary impact surfaces 52a of the rotary impact absorber 16a and transmit the rotary impact pulse to the rotary beater 16a. The Drehschlagaufnehmer 16a makes in a rotational impact operation a rotational impact transmission between the racket 14a and the output unit 12a ago by the rotational impact pulse from the racket 14a transmits to the output unit 12a.

Die Drehschlagabschaltvorrichtung 18a ist dazu vorgesehen, für den Hammerschlagbetrieb die Drehschlagübertragung von dem Schläger 14a auf den Drehschlagaufnehmer 16a zu unterbrechen. Dazu verschiebt die Drehschlagabschaltvorrichtung 18a den Drehschlagaufnehmer 16a in eine Position, in der die Drehschlagflächen 52a des Drehschlagaufnehmers 16a außer Reichweite der Drehschlagflächen 54a des Schlägers 14a angeordnet sind. Eine Schlägerfangvorrichtung 20a der Handwerkzeugmaschinenvorrichtung 10a befestigt bei dem Hammerschlagbetrieb den Schläger 14a zeitweise drehfest. Die Schlägerfangvorrichtung 20a umfasst angefederte Kugeln 53a, die dazu vorgesehen sind, in eine in axialer Richtung verlaufende Nut des Schlägers 14a zu greifen. Die Schlägerfangvorrichtung 20a gibt den Schläger 14a während des gesamten Drehschlagbetriebs in Umfangsrichtung drehbar frei. Dazu weist die Schlägerfangvorrichtung 20a einen nicht näher dargestellten, dem Fachmann als sinnvoll erscheinenden Mechanismus auf.The Drehschlagabschaltvorrichtung 18a is provided for the hammering operation to interrupt the rotational impact transmission from the racket 14a on the rotary impact receptacle 16a. For this purpose, the Drehschlagabschaltvorrichtung 18a moves the Drehschlagaufnehmer 16a in a position in which the rotational impact surfaces 52a of the Drehschlagaufnehmers 16a are out of reach of the rotational impact surfaces 54a of the racket 14a arranged. A racket catching device 20a of the portable power tool device 10a temporarily fixes the racket 14a in a rotationally fixed manner during the hammering operation. The racket catcher 20a comprises sprung balls 53a intended to engage in an axially extending groove of the racket 14a. The racket catcher 20a rotatably releases the racket 14a in the circumferential direction during the entire rotary impact operation. For this purpose, the club-catching device 20a has a mechanism which is not shown in detail and appears to the skilled person to be useful.

Während die Schlägerfangvorrichtung 20a den Schläger 14a bei dem Hammerschlagbetrieb drehfest befestigt, verschieben die Verbindungsmittel 48a den Schläger 14a in eine von der Abtriebseinheit 12a weg weisende Richtung gegen die Schlagwerkfeder 50a. Wenn eine von den Verbindungsmitteln 48a auf den Schläger 14a in Umfangsrichtung wirkende Kraft eine Haltekraft der Schlägerfangvorrichtung 20a überschreitet, gibt die Schlägerfangvorrichtung 20a den Schläger 14a frei. Die Schlagwerkfeder 50a beschleunigt den Schläger 14a in Richtung der Abtriebseinheit 12a. Dabei dreht sich der Schläger 14a. Der Schläger 14a trifft mit einer Hammerschlagfläche 56a des Schlägers 14a auf eine Hammerschlagfläche 58a der Abtriebseinheit 12a. Dabei gibt der Schläger 14a den Hammerschlagimpuls an die Abtriebseinheit 12a ab. Anschließend befestigt die Schlägerfangvorrichtung 20a den Schläger 14a erneut drehfest. Somit ist der Schläger 14a dazu vorgesehen, bei dem Drehschlagbetrieb einen Drehschlagimpuls und bei dem Hammerschlagbetrieb einen Hammerschlagimpuls in Richtung der Abtriebseinheit 12a abzugeben.While the racket catching device 20a rotatably secures the racket 14a in the hammering operation, the connecting means 48a displaces the racket 14a against the striking mechanism spring 50a in a direction away from the output unit 12a. When a force acting on the racket 14a by the connecting means 48a in the circumferential direction exceeds a holding force of the racket catcher 20a, the racket catcher 20a releases the racket 14a. The striking mechanism spring 50a accelerates the racket 14a in the direction of the output unit 12a. At this time, the racket 14a rotates. The racket 14a strikes a hammer-striking surface 58a of the output unit 12a with a hammer-striking surface 56a of the racket 14a. At this time, the racket 14a delivers the hammer blow pulse to the output unit 12a. Subsequently, the racket catching device 20a rotatably fixes the racket 14a again. Thus, the racket 14a is provided to deliver a rotary impact pulse in the rotary impact operation and a hammer blow pulse in the direction of the output unit 12a in the hammering operation.

Die Handwerkzeugmaschinenvorrichtung 10a weist eine Drehantriebswelle 22a auf, die dazu vorgesehen ist, die Abtriebseinheit 12a in einem Schlagbohrmodus und in einem Bohr- und/oder Schraubmodus drehend anzutreiben. Die Handwerkzeugmaschinenvorrichtung 10a weist eine Drehantriebkupplung 24a auf, die dazu vorgesehen ist, die Drehantriebswelle 22a und die Abtriebseinheit 12a in dem Schlagbohrmodus und in dem Bohr- und/oder Schraubmodus drehfest zu verbinden. Die Drehantriebkupplung 24a ist dazu vorgesehen, die Drehantriebswelle 22a und die Abtriebseinheit 12a in einem Drehschlagmodus und in einem Meißelmodus zu trennen. Der Schläger 14a umschließt die Drehantriebswelle 22a auf einer Ebene, die senkrecht zu einer Rotationsachse der Drehantriebswelle 22a ausgerichtet ist.The hand-held power tool device 10a has a rotary drive shaft 22a, which is provided to drive the output unit 12a in a percussion drilling mode and in To drive a drilling and / or screwdriving mode rotating. The hand tool device 10a has a rotary drive coupling 24a, which is provided for non-rotatably connecting the rotary drive shaft 22a and the output unit 12a in the impact drilling mode and in the drilling and / or screwing mode. The rotary drive clutch 24a is provided to disconnect the rotary drive shaft 22a and the output unit 12a in a spin-perch mode and in a chisel mode. The beater 14a encloses the rotary drive shaft 22a on a plane perpendicular to a rotational axis of the rotary drive shaft 22a.

Die Schlägerantriebswelle 26a umschließt die Drehantriebswelle 22a auf einer Ebene, die ebenfalls senkrecht zu einer Rotationsachse der Drehantriebswelle 22a ausgerichtet ist. Die Handwerkzeugmaschinenvorrichtung 10a weist eine Schlägerkupplung 28a auf, die dazu vorgesehen ist, die Schlägerantriebswelle 26a in dem Schlagbohrmodus, in dem Meißelmodus und in dem Drehschlagmodus drehend anzutreiben. Die Schlägerkupplung 28a ist dazu vorgesehen, den Schläger 14a in dem Bohr- und/oder Schraubmodus auszukuppeln, indem sie die Schlägerantriebswelle 26a auskuppelt. Die Schlägerkupplung 28a ist hier teilweise einstückig mit einer Getriebestufe 60a der Handwerkzeugmaschinenvorrichtung 10a ausgebildet, die dazu vorgesehen ist, eine Drehzahl der Drehantriebswelle 22a auf eine Drehzahl der Schlägerantriebswelle 26a zu erhöhen. Alternativ könnte eine Getriebestufe eine Drehzahl einer Schlägerantriebswelle auf eine Drehzahl einer Drehantriebswelle verringern.The racket drive shaft 26a encloses the rotary drive shaft 22a on a plane which is also aligned perpendicular to a rotational axis of the rotary drive shaft 22a. The handheld power tool apparatus 10a includes a racket clutch 28a provided to rotationally drive the racket drive shaft 26a in the percussion drilling mode, in the chisel mode, and in the rotary impact mode. The racket clutch 28a is provided to disengage the racket 14a in the drilling and / or screwing mode by disengaging the racket drive shaft 26a. The racket clutch 28a here is partially formed integrally with a gear stage 60a of the power tool apparatus 10a, which is intended to increase a rotational speed of the rotary drive shaft 22a to a rotational speed of the racket drive shaft 26a. Alternatively, a gear stage could reduce a speed of a club drive shaft to a speed of a rotary drive shaft.

Die Handwerkzeugmaschinenvorrichtung 10 umfasst eine in Figur 2 schematisch dargestellte Meißelkupplung 30a, die dazu vorgesehen ist, die Abtriebseinheit 12a in dem Meißelmodus drehfest zu befestigen.The hand-held power tool device 10 comprises an in FIG. 2 schematically illustrated chisel coupling 30a, which is intended to rotatably fix the output unit 12a in the chisel mode.

In den Figuren 5 und 6 ist ein weiteres Ausführungsbeispiel der Erfindung gezeigt. Die nachfolgenden Beschreibungen und die Zeichnungen beschränken 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 des anderen Ausführungsbeispiels der Figuren 1 bis 4 verwiesen werden kann. Zur Unterscheidung der Ausführungsbeispiele ist der Buchstabe a den Bezugszeichen des Ausführungsbeispiels in den Figuren 1 bis 4 nachgestellt. In dem Ausführungsbeispiel der Figuren 5 bis 6 ist der Buchstabe a durch den Buchstaben b ersetzt.In the FIGS. 5 and 6 a further embodiment of the invention is shown. The following descriptions and the drawings are essentially limited to the differences between the embodiments, wherein with respect to identically named components, in particular with respect to components with the same reference numerals, in principle to the drawings and / or the description of the other embodiment of FIGS. 1 to 4 can be referenced. To distinguish the embodiments of the letter a is the reference numerals of the embodiment in the FIGS. 1 to 4 readjusted. In the embodiment of FIGS. 5 to 6 the letter a is replaced by the letter b.

Figur 5 zeigt eine Handwerkzeugmaschinenvorrichtung 10b mit einer Abtriebseinheit 12b, einem Schläger 14b, einem Drehschlagaufnehmer 16b, einer Drehschlagabschaltvorrichtung 18b, einer Schlägerfangvorrichtung 20b und einer Schlägerantriebswelle 26b. Die Drehschlagabschaltvorrichtung 18b ist dazu vorgesehen, in einem Drehschlagbetrieb eine Drehschlagübertragung zwischen dem Schläger 14b und der Abtriebseinheit 12b herzustellen. Die Drehschlagabschaltvorrichtung 18b ist dazu vorgesehen, in einem Hammerschlagbetrieb die Drehschlagübertragung von dem Schläger 14b auf den Drehschlagaufnehmer 16b zu unterbrechen. FIG. 5 FIG. 10 shows a handheld power tool apparatus 10b having a power take off unit 12b, a club 14b, a rotary beater 16b, a rotary impact shutoff apparatus 18b, a club catcher 20b and a club drive shaft 26b. The Drehschlagabschaltvorrichtung 18b is intended to produce a rotational impact transmission between the racket 14b and the output unit 12b in a rotational impact operation. The Drehschlagabschaltvorrichtung 18b is intended to interrupt in a hammering operation, the rotational impact transmission from the racket 14b on the rotary impact receptacle 16b.

Figur 6 zeigt die Schlägerantriebswelle 26b. Die Schlägerantriebswelle 26b weist zwei Kurvenführungen 46b auf. Die Kurvenführungen 46b weisen eine gleiche Kurvenform auf. Die Kurvenführungen 46b sind um eine Rotationsachse der Schlägerantriebswelle 26b um 180 Grad versetzt angeordnet. Die Kurvenführungen 46b weisen jeweils einen spiralförmigen Schlägeraufzugsbereich 64b und einen Freischlagbereich 66b auf. Der Freischlagbereich 66b verbindet zwei Enden des Schlägeraufzugsbereichs 64b. Die Kurvenführungen 46b umschließen eine Drehachse der Schlägerantriebswelle 26b um 360 Grad. In den Kurvenführungen 46b sind zwei Verbindungsmittel 48b geführt. Wenn die Verbindungsmittel 48b in den Freischlagbereichen 66b angeordnet sind, ist der Schläger 14b in axialer Richtung beweglich. Die Verbindungsmittel 48b sind in Positionen angeordnet, die relativ zu dem Schläger 14b unveränderlich sind. Die Verbindungsmittel 48b sind als Kugeln ausgebildet, die in Aussparungen 62b des Schlägers 14b passgenau eingreifen. FIG. 6 shows the club drive shaft 26b. The racket drive shaft 26b has two cam guides 46b. The cam guides 46b have the same waveform. The cam guides 46b are arranged offset by 180 degrees about a rotation axis of the racket driving shaft 26b. The cam guides 46b each have a spiral beater lift section 64b and a release bump section 66b. The clearing area 66b connects two ends of the racket lift area 64b. The cam guides 46b enclose a rotation axis of the racket driving shaft 26b by 360 degrees. Two connecting means 48b are guided in the cam guides 46b. When the connecting means 48b are disposed in the clearing portions 66b, the racket 14b is movable in the axial direction. The connecting means 48b are arranged in positions which are fixed relative to the racket 14b. The connecting means 48b are formed as balls, which engage in recesses 62b of the racket 14b fit.

Der Schläger 14b und der Drehschlagaufnehmer 16b weisen jeweils Drehschlagflächen 52b, 54b auf. Die Drehschlagflächen 52b, 54b greifen bei einem Drehschlag ineinander, wodurch der Schläger 14b in Umfangsrichtung gebremst wird. Die Verbindungsmittel 48b bewegen den Schläger 14b bei dem Drehschlagbetrieb entgegen einer Schlagwerkfeder 50b der Handwerkzeugmaschinenvorrichtung 10b in eine von dem Drehschlagaufnehmer 16b weggewandte Richtung. Dabei laufen die Verbindungsmittel 48b in den Schlägeraufzugsbereich 64b der Kurvenführungen 46b. Bei einem Drehschlagbetrieb ist der Schläger 14b drehbar gelagert. Sobald der Schläger 14b und der Drehschlagaufnehmer 16b außer Eingriff stehen, beschleunigen die Verbindungsmittel 48b den Schläger 14b in Umfangsrichtung. Die Beschleunigung des Schlägers 14b in Umfangsrichtung ist von einer Steilheit des Schlägeraufzugsbereichs 64b abhängig. Sobald die Verbindungsmittel 48b in die Freischlagbereiche 66b der Kurvenführungen 46b eintreten, beschleunigt die Schlagwerkfeder 50b den Schläger 14b axial in Richtung der Abtriebseinheit 12b, bis die Drehschlagflächen 52b, 54b aufeinandertreffen und der Drehschlagaufnehmer 16b den Drehschlagimpuls in Richtung der Abtriebseinheit 12b überträgt. Die Drehschlagflächen 52b, 54b sind so ausgerichtet, dass die Übertragung des Drehschlagimpulses die axiale Bewegung des Schlägers 14b im Wesentlichen stoppt.The beater 14b and the rotary beater 16b each have rotary beating surfaces 52b, 54b. The rotary impact surfaces 52b, 54b engage in a rotary impact with each other, whereby the racket 14b is braked in the circumferential direction. The connecting means 48b move the racket 14b against a striking mechanism spring 50b of the hand-held power tool device 10b in a direction away from the rotary striking receiver 16b during the rotational striking operation. In this case, the connecting means 48b run into the racket lifting area 64b of the cam guides 46b. In a rotary impact operation, the racket 14b is rotatably mounted. Once the beater 14b and the rotary beater 16b are disengaged, the connecting means 48b accelerate the beater 14b in the circumferential direction. The acceleration of the racket 14b in the circumferential direction depends on a steepness of the racket lift area 64b. As soon as the connecting means 48b enter the clearance areas 66b of the cam guides 46b, the percussion spring 50b accelerates the racket 14b axially in the direction of the output unit 12b until the rotational impact surfaces 52b, 54b meet and the Drehschlagaufnehmer 16b transmits the rotational shock pulse in the direction of the output unit 12b. The rotational impact surfaces 52b, 54b are oriented so that the transmission of the rotational impact pulse substantially stops the axial movement of the beater 14b.

Alternativ könnte eine Steilheit eines Schlägeraufzugsbereichs so ausgelegt sein, dass eine Drehgeschwindigkeit eines Schlägers zeitweise eine Drehgeschwindigkeit einer Drehantriebswelle übersteigt. Dann wäre der Schläger bei einer Bewegung in Richtung einer Abtriebseinheit durch Führungsmittel in den Schlägeraufzugsbereichen geführt.Alternatively, a steepness of a racket winding area could be designed such that a rotational speed of a racket temporarily exceeds a rotational speed of a rotary drive shaft. Then the racket would be guided by a guide means in the racket hoist areas during a movement in the direction of an output unit.

In dem Hammerschlagbetrieb sind die Drehschlagflächen 52b des Drehschlagaufnehmers 16b außerhalb einer Reichweite der Drehschlagflächen 54b des Schlägers 14b angeordnet. Die Schlägerfangvorrichtung 20b befestigt den Schläger 14b während des gesamten Hammerschlagbetriebs axial verschiebbar und drehfest. Die Schlägeraufzugsbereiche 64b der Kurvenführungen 46b bewegen den Schläger 14b über die Verbindungsmittel 48b entgegen der Schlagwerkfeder 50b. Die Schlagwerkfeder 50b bewegt den Schläger 14b in Richtung der Abtriebseinheit 12b, sobald die Verbindungsmittel 48b in den Freischlagbereichen 66b angeordnet sind. Eine Hammerschlagfläche 56b des Schlägers 14b überträgt einen Hammerschlagimpuls auf eine Hammerschlagfläche 58b der Abtriebseinheit 12b.In the hammering operation, the rotational impact surfaces 52b of the rotary impact absorber 16b are located outside a range of the rotational impact surfaces 54b of the racquet 14b. The racket catcher 20b fixes the racket 14b axially displaceable and non-rotatably during the entire hammering operation. The racket lifting areas 64b of the cam guides 46b move the racket 14b against the percussion spring 50b via the connecting means 48b. The percussion spring 50b moves the racket 14b in the direction of the output unit 12b as soon as the connection means 48b are arranged in the clearing areas 66b. A hammering surface 56b of the racket 14b transmits a hammer blow impulse to a hammering surface 58b of the output unit 12b.

Claims (11)

  1. Portable power tool device having a drive output unit (12a; 12b), a striker (14a; 14b), a percussion spring (50a; 50b), a rotary percussion receiver (16a; 16b) which is intended, at least in rotary percussion operation, to establish rotary percussion transmission between the striker (14a; 14b) and the drive output unit (12a; 12b), and having a rotary percussion switch-off device (18a; 18b) which is intended, at least in hammer percussion operation, to interrupt the rotary percussion transmission from the striker (14a; 14b) to the rotary percussion receiver (16a; 16b), wherein the striker (14a; 14b) is intended to deliver at least one rotary percussion pulse during rotary percussion operation, characterized in that the striker (14a; 14b) is intended to deliver at least one hammer percussion pulse in the direction of the drive output unit (12a; 12b) during hammer percussion operation, and in that the percussion spring (50a; 50b) is intended to accelerate the striker (14a; 14b) in the direction of the drive output unit (12a; 12b) during hammer percussion operation.
  2. Portable power tool device according to Claim 1, characterized in that the rotary percussion switch-off device (18a; 18b) is intended to bear the rotary percussion receiver (16a; 16b) in an axially displaceable manner.
  3. Portable power tool device according to either of the preceding claims, characterized by a striker catching device (20a; 20b) which fastens the striker (14a; 14b) at least temporarily in a rotationally fixed manner at least during hammer percussion operation.
  4. Portable power tool device according to Claim 3, characterized in that the striker catching device (20a; 20b) frees the striker (14a; 14b) to be able to rotate in the circumferential direction at least during rotary percussion operation.
  5. Portable power tool device according to one of the preceding claims, characterized by a rotary drive shaft (22a; 22b) which is intended to drive the drive output unit (12a; 12b) in rotation at least in a percussion drilling mode.
  6. Portable power tool device according to Claim 5, characterized by a rotary drive coupling (24a; 24b) which is intended to separate the rotary drive shaft (22a; 22b) and the drive output unit (12a; 12b) at least in a rotary percussion mode.
  7. Portable power tool device at least according to Claim 5, characterized in that the striker (14a; 14b) at least substantially surrounds the rotary drive shaft (22a; 22b) in at least one plane.
  8. Portable power tool device at least according to Claim 5, characterized by a striker drive shaft (26a; 26b) which at least substantially surrounds the rotary drive shaft (22a; 22b) in at least one plane.
  9. Portable power tool device according to one of the preceding claims, characterized by a striker coupling (28a; 28b) which is intended to decouple the striker (14a; 14b) at least in a drilling mode.
  10. Portable power tool device according to one of the preceding claims, characterized by a chisel coupling (30a; 30b) which is intended to fasten the drive output unit (12a; 12b) in a rotationally fixed manner in a chiselling mode.
  11. Portable power tool having a portable power tool device (10a; 10b) according to one of the preceding claims.
EP13723094.2A 2012-06-05 2013-05-14 Apparatus of hand-held machine tool Active EP2855099B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012209446A DE102012209446A1 (en) 2012-06-05 2012-06-05 Hand machine tool device
PCT/EP2013/059869 WO2013182384A1 (en) 2012-06-05 2013-05-14 Hand-held power tool device

Publications (2)

Publication Number Publication Date
EP2855099A1 EP2855099A1 (en) 2015-04-08
EP2855099B1 true EP2855099B1 (en) 2018-01-03

Family

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Application Number Title Priority Date Filing Date
EP13723094.2A Active EP2855099B1 (en) 2012-06-05 2013-05-14 Apparatus of hand-held machine tool

Country Status (5)

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US (1) US10583544B2 (en)
EP (1) EP2855099B1 (en)
CN (1) CN104334320B (en)
DE (1) DE102012209446A1 (en)
WO (1) WO2013182384A1 (en)

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Also Published As

Publication number Publication date
US10583544B2 (en) 2020-03-10
DE102012209446A1 (en) 2013-12-05
WO2013182384A1 (en) 2013-12-12
CN104334320B (en) 2016-07-06
EP2855099A1 (en) 2015-04-08
US20150129268A1 (en) 2015-05-14
CN104334320A (en) 2015-02-04

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