EP1170096B1 - Combined power tool - Google Patents

Combined power tool Download PDF

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Publication number
EP1170096B1
EP1170096B1 EP01810622A EP01810622A EP1170096B1 EP 1170096 B1 EP1170096 B1 EP 1170096B1 EP 01810622 A EP01810622 A EP 01810622A EP 01810622 A EP01810622 A EP 01810622A EP 1170096 B1 EP1170096 B1 EP 1170096B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
power tool
electric power
rotary
tool according
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.)
Expired - Lifetime
Application number
EP01810622A
Other languages
German (de)
French (fr)
Other versions
EP1170096A1 (en
Inventor
Josef Fünfer
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP1170096A1 publication Critical patent/EP1170096A1/en
Application granted granted Critical
Publication of EP1170096B1 publication Critical patent/EP1170096B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/068—Crank-actuated impulse-driving mechanisms

Definitions

  • the invention relates to a combined electric hand tool device, such as a combination hammer, for generating an at least partially rotating movement of a tool.
  • Such combined electric hand tools produce both one with a drive rotating as well as striking movement, whereby between the individual operating modes, such as drilling, drill bits or chisels, with a mode selector switch, which with connected to the gearbox, can be changed manually.
  • the torque is transmitted from the drive to of the tool holder holding the tool separately and also non-rotatably locked with respect to the housing of the electric hand tool and usually more allowed as a discrete relative angular position.
  • the axially displaceable switching sleeve is non-rotatable with the one with the Tool holder connected, guide tube connected and as part of the gearbox assigned by axial displacement in at least two different engagement positions Gears can be moved, one for locking the rotary movement of the tool holder serving teeth is rotatably connected to the housing.
  • EP0759342A2 there is an associated positioning of a rotatable mode selector switch by an axial displacement of a resiliently biased, with the housing non-rotatably connected, locking sleeve with a radially circumferential toothing with connected to the tool holder and with assigned radially circumferential counter teeth trained guide tube lockable against the housing.
  • the guide tube is connected to the tool holder Provide non-rotatable, axially displaceable switching sleeve with circumferential radial openings, into which with the assigned positioning of a rotatable mode selector switch a bolt engaging radially from the outside, non-rotatably connected to the housing Locking of the rotary movement of the tool holder with respect to the housing takes place.
  • the object of the invention is to implement a further locking of the Rotary movement of the tool holder with respect to the housing of a combined Electric power tool.
  • a tool holder that can be rotated at least partially about an axis of rotation a combined electrical hand tool device with several operating modes outer sleeve coaxially assigned non-rotatably, which at least one, advantageously several over radial openings distributed around the circumference, which do not necessarily have to be continuous, has in which a via a manually operated mode selector switch across Rotation axis displaceable and non-rotatable with a housing of the electrical hand tool device connected bolt, which with a sliding sleeve arranged on a drive shaft is connected, engages radially in at least one operating mode.
  • a switch plate that can be manually adjusted via the mode selector switch is also advantageous into the sliding sleeve.
  • the tool holder is thus over the sleeve and over the bolt engaging in the openings of the sleeve rotatably with the housing of the Electric hand tool device connected or locked against this.
  • the sleeve around a guide tube with a flying piston for producing a is advantageous Impact movement arranged around.
  • the sleeve is further advantageously provided on one end face with a conical pinion, which is at least partially in engagement with an associated conical drive pinion stands for the rotary drive, the drive shaft advantageously transverse to the axis of rotation of the tool holder is oriented.
  • the sleeve is advantageously non-positively connected to the guide tube via its other end face connected, with an axially biased compression spring against an axially limited Movable clutch disc, positively connected to the guide tube in a rotationally fixed manner a safety clutch to limit what is transferred to the tool holder Torque is formed.
  • a tool spindle 1 that is at least partially rotatable about an axis of rotation A. for fastening a tool holder, not shown, of a part shown only combined electrical hand tool device with several operating modes an outer Sleeve 2 coaxially assigned non-rotatably, which several, distributed over the circumference, radial Has openings 3, in which, via a manually operated mode selector switch 4, Transversely to the axis of rotation A and rotatable with a housing 5 of the electric hand tool device connected bolt 6 engages radially.
  • the sleeve 2 is around a guide tube 7 with an internal flying piston, not shown, arranged around and on one End face provided with a conical pinion 8, which is at least partially in engagement stands with an associated conical drive pinion 9, the drive shaft B is oriented perpendicular to the axis of rotation A.
  • the sleeve is one with respect to its other end face Coupled clutch plate 10 adjacent, which with the guide tube 7 form-fitting rotatably connected and axially pressed against the sleeve 2 via a compression spring 11.
  • the Bolt 6 which can be displaced perpendicularly to the axis of rotation A, has a pin 6 on the shaft of the drive pinion 9 arranged sliding sleeve 12 connected, which form-fitting via a Sliding sleeve 12 engaging switching plate 13 with the manually operated mode selector switch 4 is connected.

Landscapes

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

Description

Die Erfindung bezeichnet ein kombiniertes Elektrohandwerkzeuggerät, wie einen Kombihammer, zur Erzeugung einer zumindest teilweise drehenden Bewegung eines Werkzeuges.The invention relates to a combined electric hand tool device, such as a combination hammer, for generating an at least partially rotating movement of a tool.

Derartige kombinierte Elektrohandwerkzeuge erzeugen mit einem Antrieb sowohl eine drehende als auch eine schlagende Bewegung, wobei zwischen den einzelnen Betriebsmoden, wie Bohren, Bohrmeisseln oder Meisseln, mit einem Modenwahlschalter, welcher mit dem Getriebe verbunden ist, manuell gewechselt werden kann.Such combined electric hand tools produce both one with a drive rotating as well as striking movement, whereby between the individual operating modes, such as drilling, drill bits or chisels, with a mode selector switch, which with connected to the gearbox, can be changed manually.

In einer Betriebsart, bspw. Meisseln, ist die Übertragung des Drehmoments vom Antrieb zu der ein Werkzeug aufnehmenden Werkzeugaufnahme getrennt und zudem diese drehfest bezüglich des Gehäuses des Elektrohandwerkzeuges arretiert und dazu üblicherweise mehr als eine diskrete relative Winkelposition zulässig.In one operating mode, for example chisels, the torque is transmitted from the drive to of the tool holder holding the tool separately and also non-rotatably locked with respect to the housing of the electric hand tool and usually more allowed as a discrete relative angular position.

Nach der US5379848 kann zwischen einer rein drehenden und einer rein schlagenden Bewegung eines Werkzeugs durch die axiale Verschiebung einer, ein Schlagwerk aufnehmendes sowie mit der Werkzeugaufnahme verbundenes drehbares Führungsrohr umfassenden, Schalthülse über einen exzentrischen Eingriff in ein mit der Schalthülse verbundenes Schaltblech eines drehbaren Modenwahlschalters gewechselt werden.According to US5379848 can be between a purely rotating and a purely striking Movement of a tool due to the axial displacement of a tool receiving a striking mechanism as well as a rotatable guide tube connected to the tool holder, Switch sleeve via an eccentric engagement in a connected to the switch sleeve Switch plate of a rotatable mode selector switch can be changed.

Nach der DE4206840A1 ist die axial verschiebbare Schalthülse drehfest mit dem, mit der Werkzeugaufnahme verbundenen, Führungsrohr verbunden und als Teil des Getriebes durch axiale Versetzung in zumindest zwei verschiedenen Eingriffspositionen zugeordneter Verzahnungen versetzbar, wobei eine zur Arretierung der Drehbewegung der Werkzeugaufnahme dienende Verzahnung drehfest mit dem Gehäuse verbunden ist.According to DE4206840A1, the axially displaceable switching sleeve is non-rotatable with the one with the Tool holder connected, guide tube connected and as part of the gearbox assigned by axial displacement in at least two different engagement positions Gears can be moved, one for locking the rotary movement of the tool holder serving teeth is rotatably connected to the housing.

Nach der EP0759342A2 ist bei zugeordneter Positionierung eines drehbaren Modenwahlschalters durch eine axiale Verschiebung einer federnd vorgespannten, mit dem Gehäuse drehfest verbundenen, Arretierungshülse mit einer radial umfänglichen Verzahnung das mit der Werkzeugaufnahme verbundene und mit zugeordneter radial umfänglichen Gegenverzahnungen ausgebildete Führungsrohr gegenüber dem Gehäuse arretierbar. According to EP0759342A2 there is an associated positioning of a rotatable mode selector switch by an axial displacement of a resiliently biased, with the housing non-rotatably connected, locking sleeve with a radially circumferential toothing with connected to the tool holder and with assigned radially circumferential counter teeth trained guide tube lockable against the housing.

Nach der US4763733 ist die auf dem, mit der Werkzeugaufnahme verbundenen, Führungsrohr drehfest axial verschiebbare Schalthülse mit umfänglichen radialen Öffnungen versehen, in welche bei zugeordneter Positionierung eines drehbaren Modenwahlschalters durch einen radial von Aussen eingreifenden, drehfest mit dem Gehäuse verbundenen, Bolzen die Arretierung der Drehbewegung der Werkzeugaufnahme bezüglich des Gehäuses erfolgt.According to US4763733, the guide tube is connected to the tool holder Provide non-rotatable, axially displaceable switching sleeve with circumferential radial openings, into which with the assigned positioning of a rotatable mode selector switch a bolt engaging radially from the outside, non-rotatably connected to the housing Locking of the rotary movement of the tool holder with respect to the housing takes place.

Die Aufgabe der Erfindung besteht in der Realisierung einer weiteren Arretierung der Drehbewegung der Werkzeugaufnahme bezüglich des Gehäuses eines kombinierten Elektrohandwerkzeuggerätes.The object of the invention is to implement a further locking of the Rotary movement of the tool holder with respect to the housing of a combined Electric power tool.

Die Aufgabe wird im wesentlichen durch die Merkmale der unabhängigen Ansprüche gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.The task is essentially solved by the features of the independent claims. Advantageous further developments result from the subclaims.

Im wesentlichen ist einer zumindest teilweise um eine Drehachse drehbaren Werkzeugaufnahme eines kombinierten Elektrohandwerkzeuggerätes mit mehreren Betriebsmodi eine äussere Hülse koaxial drehfest zugeordnet, welche zumindest eine, vorteilhaft mehrere über den Umfang verteilte, radiale Öffnungen, welche nicht notwendig durchgängig sein müssen, aufweist, in welche ein über einen manuell betätigbaren Modenwahlschalter quer zur Drehachse versetzbarer und drehfest mit einem Gehäuse des Elektrohandwerkzeuggerätes verbundener Bolzen, welcher mit einer auf einer Antriebswelle angeordneten Schiebehülse verbunden ist, in zumindest einem Betriebsmode radial eingreift.Essentially, is a tool holder that can be rotated at least partially about an axis of rotation a combined electrical hand tool device with several operating modes outer sleeve coaxially assigned non-rotatably, which at least one, advantageously several over radial openings distributed around the circumference, which do not necessarily have to be continuous, has in which a via a manually operated mode selector switch across Rotation axis displaceable and non-rotatable with a housing of the electrical hand tool device connected bolt, which with a sliding sleeve arranged on a drive shaft is connected, engages radially in at least one operating mode.

Dazu greift weiter vorteilhaft ein manuell über den Modenwahlschalter versetzbares Schaltblech in die Schiebehülse ein.A switch plate that can be manually adjusted via the mode selector switch is also advantageous into the sliding sleeve.

In diesem Betriebsmode ist somit die Werkzeugaufnahme über die Hülse und weiter über den in die Öffnungen der Hülse eingreifenden Bolzen drehfest mit dem Gehäuse des Elektrohandwerkzeuggerätes verbunden bzw. gegen dieses arretiert.In this operating mode, the tool holder is thus over the sleeve and over the bolt engaging in the openings of the sleeve rotatably with the housing of the Electric hand tool device connected or locked against this.

Vorteilhaft ist die Hülse um ein Führungsrohr mit einem Flugkolben zur Erzeugung einer Schlagbewegung herum angeordnet.The sleeve around a guide tube with a flying piston for producing a is advantageous Impact movement arranged around.

Weiter vorteilhaft ist die Hülse an einer Stirnseite mit einem kegelförmigen Ritzel versehen, welches zumindest teilweise im Eingriff mit einem zugeordneten kegelförmigen Antriebsritzel für den Drehantrieb steht, dessen Antriebswelle vorteilhaft quer zur Drehachse der Werkzeugaufnahme orientiert ist. The sleeve is further advantageously provided on one end face with a conical pinion, which is at least partially in engagement with an associated conical drive pinion stands for the rotary drive, the drive shaft advantageously transverse to the axis of rotation of the tool holder is oriented.

Vorteilhaft ist die Hülse über ihre andere Stirnseite kraftschlüssig mit dem Führungsrohr verbunden, wobei über eine axial vorgespannte Druckfeder gegen eine axial begrenzt bewegliche, formschlüssig drehfest mit dem Führungsrohr verbundene Kupplungsscheibe eine Sicherheitskupplung zur Begrenzung des auf die Werkzeugaufnahme übertragenen Drehmoments ausgebildet ist.The sleeve is advantageously non-positively connected to the guide tube via its other end face connected, with an axially biased compression spring against an axially limited Movable clutch disc, positively connected to the guide tube in a rotationally fixed manner a safety clutch to limit what is transferred to the tool holder Torque is formed.

Die Erfindung wird bezüglich eines vorteilhaften Ausführungsbeispiels näher erläutert mit:

  • Fig. 1 als Teil eines kombinierten Elektrohandwerkzeuggerätes mit arretierter Drehbewegung
  • Fig. 2 als Teil eines kombinierten Elektrohandwerkzeuggerätes ohne arretierte Drehbewegung
    • The invention is explained in more detail with respect to an advantageous exemplary embodiment with:
  • Fig. 1 as part of a combined electric hand tool device with locked rotary movement
  • Fig. 2 as part of a combined electric hand tool device without locked rotary movement

    • Nach Fig. 1 ist eine zumindest teilweise um eine Drehachse A drehbare Werkzeugspindel 1 zur Befestigung einer nicht dargestellten Werkzeugaufnahme eines nur teilweise dargestellten kombinierten Elektrohandwerkzeuggerätes mit mehreren Betriebsmodi eine äussere Hülse 2 koaxial drehfest zugeordnet, welche mehrere über den Umfang verteilte, radiale Öffnungen 3 aufweist, in welche ein, über einen manuell betätigbaren Modenwahlschalter 4, quer zur Drehachse A versetzbarer und drehfest mit einem Gehäuse 5 des Elektrohandwerkzeuggerätes verbundener Bolzen 6 radial eingreift. Die Hülse 2 ist um ein Führungsrohr 7 mit einem, nicht dargestellten, innenliegenden Flugkolben herum angeordnet und an einer Stirnseite mit einem kegelförmigen Ritzel 8 versehen, welches zumindest teilweise im Eingriff mit einem zugeordneten kegelförmigen Antriebsritzel 9 steht, dessen Antriebswelle B senkrecht zur Drehachse A orientiert ist. Die Hülse ist bezüglich ihrer andere Stirnseite einer Kupplungsscheibe 10 benachbart zugeordnet, welche mit dem Führungsrohr 7 formschlüssig drehfest verbunden und über eine Druckfeder 11 axial gegen die Hülse 2 gedrückt wird. Der senkrecht zur Drehachse A versetzbare Bolzen 6 ist mit einer auf der Welle des Antriebsritzels 9 angeordneten Schiebehülse 12 verbunden, welche formschlüssig über ein in die Schiebehülse 12 eingreifendes Schaltblech 13 mit dem manuell betätigbaren Modenwahlschalter 4 verbunden ist.1 is a tool spindle 1 that is at least partially rotatable about an axis of rotation A. for fastening a tool holder, not shown, of a part shown only combined electrical hand tool device with several operating modes an outer Sleeve 2 coaxially assigned non-rotatably, which several, distributed over the circumference, radial Has openings 3, in which, via a manually operated mode selector switch 4, Transversely to the axis of rotation A and rotatable with a housing 5 of the electric hand tool device connected bolt 6 engages radially. The sleeve 2 is around a guide tube 7 with an internal flying piston, not shown, arranged around and on one End face provided with a conical pinion 8, which is at least partially in engagement stands with an associated conical drive pinion 9, the drive shaft B is oriented perpendicular to the axis of rotation A. The sleeve is one with respect to its other end face Coupled clutch plate 10 adjacent, which with the guide tube 7 form-fitting rotatably connected and axially pressed against the sleeve 2 via a compression spring 11. The Bolt 6, which can be displaced perpendicularly to the axis of rotation A, has a pin 6 on the shaft of the drive pinion 9 arranged sliding sleeve 12 connected, which form-fitting via a Sliding sleeve 12 engaging switching plate 13 with the manually operated mode selector switch 4 is connected.

    Nach Fig. 2 ist der mit der Schiebehülse 12 verbundene Bolzen 6, über den manuell in eine andere Position gebrachten Modenwahlschalter 4 und das in die Schiebehülse 12 eingreifende Schaltblech 13 radial ausserhalb der Öffnungen 3 der Hülse 2 angeordnet und arretiert somit nicht die Drehbewegung der Werkzeugspindel 1 um die Achse A gegen das Gehäuse 5.2 is the bolt 6 connected to the sliding sleeve 12, via which manually into a brought different position mode switch 4 and that engaging in the sliding sleeve 12 Switch plate 13 arranged and locked radially outside the openings 3 of the sleeve 2 thus not the rotational movement of the tool spindle 1 about the axis A against the housing 5th

    Claims (6)

    1. Electric power tool with a plurality of operating modes and a tool spindle (1) which is at least partially rotary around a rotary axis (A) and the one outer sleeve (2) of which is coaxially non-rotary associated and which comprises at least one radial opening (3) into which a bolt (6), which is displaceable via a manually operated mode selector switch (4) transversely to the rotary axis (A) and non rotary to a housing (5) of the electric power tool, radially engages in at least one operating mode, characterised in that the bolt (6) is connected to a sliding sleeve (12) arranged on a driveshaft (B).
    2. Electric power tool according to Claim 1, characterised in that a plurality of radial openings (3) is spaced over the periphery of the sleeve (2).
    3. Electric power tool according to Claim 1 or Claim 2, characterised in that on the sleeve (2) is designed as a conical pinion (8) which is arranged to be at least partially engaged to an associated conical drive pinion (9) of the driveshaft (B).
    4. Electric power tool according to one of the above claims, characterised in that the sliding sleeve (12) is via a positively engaging switch plate (13) connected to the manually operated mode selector switch (4).
    5. Electric power tool according to one of the above claims, characterised in that the sleeve (2) is arranged around a guide pipe (7) with an internally placed floating piston.
    6. Electric power tool according to Claim 5, characterised in that the sleeve (2) is positioned adjacent a coupling plate (10) which is non-rotary and positively connected to the guide pipe (7) and via a pressure spring (11) axially pre-tensioned against the sleeve (2).
    EP01810622A 2000-07-07 2001-06-26 Combined power tool Expired - Lifetime EP1170096B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10033100A DE10033100A1 (en) 2000-07-07 2000-07-07 Combined electric hand tool device
    DE10033100 2000-07-07

    Publications (2)

    Publication Number Publication Date
    EP1170096A1 EP1170096A1 (en) 2002-01-09
    EP1170096B1 true EP1170096B1 (en) 2004-06-02

    Family

    ID=7648156

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP01810622A Expired - Lifetime EP1170096B1 (en) 2000-07-07 2001-06-26 Combined power tool

    Country Status (5)

    Country Link
    US (1) US6510903B2 (en)
    EP (1) EP1170096B1 (en)
    JP (1) JP4772226B2 (en)
    CN (1) CN1207131C (en)
    DE (2) DE10033100A1 (en)

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    Also Published As

    Publication number Publication date
    US20020003044A1 (en) 2002-01-10
    EP1170096A1 (en) 2002-01-09
    US6510903B2 (en) 2003-01-28
    JP4772226B2 (en) 2011-09-14
    JP2002059375A (en) 2002-02-26
    CN1207131C (en) 2005-06-22
    DE50102458D1 (en) 2004-07-08
    CN1332067A (en) 2002-01-23
    DE10033100A1 (en) 2002-01-17

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