EP2314419A1 - Machine-outil électrique - Google Patents

Machine-outil électrique Download PDF

Info

Publication number
EP2314419A1
EP2314419A1 EP10187470A EP10187470A EP2314419A1 EP 2314419 A1 EP2314419 A1 EP 2314419A1 EP 10187470 A EP10187470 A EP 10187470A EP 10187470 A EP10187470 A EP 10187470A EP 2314419 A1 EP2314419 A1 EP 2314419A1
Authority
EP
European Patent Office
Prior art keywords
sliding block
machine housing
tool according
drill sleeve
toothing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10187470A
Other languages
German (de)
English (en)
Other versions
EP2314419B1 (fr
Inventor
Michael Kukla
Jan-Simon Blind
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
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 Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Publication of EP2314419A1 publication Critical patent/EP2314419A1/fr
Application granted granted Critical
Publication of EP2314419B1 publication Critical patent/EP2314419B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • 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
    • B25D2216/00—Details 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0046—Preventing rotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/121—Housing details

Definitions

  • the invention relates to a motor-driven power tool with hammer drill mode and chisel mode, with a drive train, a drill sleeve and a hammer mill comprehensive power train and an adjustment for adjusting the hammer drill mode or the chisel mode, wherein the adjusting unit comprises a sliding block, which has an internal toothing on an external toothing Drill sleeve is displaceable in the longitudinal direction of the drill sleeve.
  • Drill sleeve is displaceable in the longitudinal direction of the drill sleeve.
  • this may be, for example, a typical hammer drill in which the tool is both driven to rotate and thereby experiences a shocking in the axial direction going back and forth exerted via a reciprocating so-called bat within the hammer mill on the tool becomes.
  • a switchover to pure drilling operation and / or pure hammer or chisel operation ie without rotating drive of the tool possible.
  • the adjusting unit is switched over from the hammer drill mode to the bit mode, ie hammer function without rotating drive of the drill sleeve, at least for the use of non-rotationally symmetrical bit tools, eg.
  • a locking function are provided which prevents the rotation of the drill sleeve and the tool about its longitudinal axis.
  • Numerous solutions have become known for this purpose, wherein an additionally provided element engages in a housing-fixed recess either in the drive train or in the drive train, to effect a rotationally fixed coupling.
  • the applicant has already submitted the proposal to weld a locking ring on the sliding block, which engages in a housing-fixed recess.
  • this is costly and expensive and brings additional requirements for the coaxiality of the components to be welded together with it.
  • the present invention has for its object to improve a tool device of the type mentioned above to the effect that the previously described locking function can be realized in the simplest and most economical manner.
  • This component in turn is formed so complementary to the internal toothing of the sliding block, that in the bit mode just the aforementioned rotationally fixed coupling between the sliding block and the said component and thus also between the sliding block and the drill sleeve is realized.
  • the sliding block is indeed rotatably connected to the drill sleeve on its internal teeth.
  • the rotatable component with the machine housing in the axial direction and in the radial direction has recesses opening into which engages the internal toothing of the sliding block.
  • the mentioned non-rotatable component can be formed in an advantageous manner by a plastic part, which is claimed only for rotationally fixed fixation of the sliding block by positive locking.
  • the component rotatable with the machine housing is limitedly displaceable in the axial direction and is spring-biased toward an end position and thus limitedly deflectable against the spring preload by the sliding block, in order subsequently to rotate slightly in the sliding block Engagement position with the internal teeth of the sliding block to step.
  • This embodiment has the advantage that the sliding block can be brought in any rotational position of the drill sleeve without significant resistance in its chisel mode defining axial position in which he sets the drill sleeve rotation.
  • the rotatable with the machine housing component and a spring bias causing spring are preferably designed and arranged such that they surround the drill sleeve circumferentially.
  • the spring is supported on the one hand against an axial step and on the other hand against a side facing away from the sliding block end face of the rotatable with the machine housing component.
  • the rotatable component with the machine housing radially outwardly of the sliding block has a stop means which defines its axial end position in the direction of the sliding block.
  • This stop means is suitably against an axial support, which is preferably formed in the machine housing.
  • the component For coupling the component to the machine housing, it proves to be advantageous if the component via at least one, preferably over a plurality of radially outwardly projecting projections rotatably coupled to components of the machine housing.
  • the non-rotatable with the machine housing component is formed by a retaining ring having a portion with a complementary to the internal teeth of the sliding block outer teeth, in which the Internal toothing of the sliding block engages in the chisel mode.
  • the adjusting unit for setting the hammer drill operating mode or the bit operating mode simultaneously forms two gear stages for the rotary drive of the drill sleeve.
  • the sliding block has an external toothing, with which in a first gear stage, a pinion shaft of the drive train is in meshing drive connection. In this way, a rotary movement of the pinion shaft is transmitted via the drive train to the sliding block and thus to the drill sleeve.
  • a second gear stage is realized in that a drive wheel of the drive train is in meshing drive connection with the outer toothing of the drill sleeve.
  • the sliding block is approximately midway between its axial displacement position in the bit mode and its axial displacement position in the hammer drill mode, which is typically performed only in the first gear stage.
  • FIGS. 3 and 4 show the interior of a power tool in the form of a typical hammer drill with optional adjustable hammer mode, Bohr réellesart and chisel mode. Shown is a part of a drive train 2 in the form of an intermediate shaft 4 and the components of a power take-off 6, comprising a generally designated by the reference numeral 8 hammer mechanism and a drill sleeve 10 and a usable in a tool holder 12 tool 14, such as a drill bit or flat chisel.
  • intermediate shaft 4 is in the mode of operation shown by way of example in drive connection with the drill sleeve 10 by meshing with a rotatably seated on the drill sleeve 10 spur gear 16.
  • the drill sleeve 10 is integrally formed or at least rotatably connected to the tool holder 12. Furthermore drives the intermediate shaft 4 via a swash plate assembly, not shown, a pressure sleeve 18 in the axial direction 20 back and forth.
  • the pressure sleeve 18 defines in its interior a compressed air cushion 22 between itself and a racket 24 of the hammer mechanism 8.
  • the drill sleeve 10 includes an outer toothing 28 which is rotatably coupled to an internal toothing 30 of the drive wheel 16.
  • the drive wheel 16 forms a sliding block 32 which is displaceable in the axial direction 20 on the drill sleeve 10 and rotatably coupled to the drill sleeve.
  • a rotatably with a machine housing 33 component 34 is provided which surrounds the drill sleeve 10 in the circumferential direction.
  • This component 34 has depressions 36 which open in the axial direction and in the radial direction and into which the internal toothing 30 of the sliding block 32 engages when the sliding block 16 moves in the axial direction 20 into the inward-facing grooves FIG. 4 shown axial displacement position for the bit mode is shifted.
  • the component 34 is formed in the example shown as a retaining ring 38 and the recesses 36 are formed by an external toothing 40 in this retaining ring 38, which is complementary to the internal toothing 30 of the sliding block 32.
  • the component 34 which is non-rotatable with the machine housing is additionally displaceable in the axial direction in a limited manner. It is under spring bias by a spring 44, which is supported on the one hand against an axial step 46 and the other end against an end face 48 of the retaining ring 38. This ensures that the internal toothing 30 of the sliding block 16 can easily reach the external toothing 40 of the retaining ring 38 in the engaged position. In not exactly aligned rotational position of the sliding block 16 can slightly deflect the retaining ring 38 in the axial direction, so that due to the spring preload by subsequent slight rotation of the sliding block and the drill sleeve in FIG. 4 shown engagement position is taken automatically.
  • Reference numeral 50 a stop means in the retaining ring 38 is shown, which defines an axial end position of the retaining ring 38 by abutment with a projection of the machine housing 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
EP20100187470 2009-10-21 2010-10-13 Machine-outil électrique Active EP2314419B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910050013 DE102009050013A1 (de) 2009-10-21 2009-10-21 Motorisch angetriebens Werkzeuggerät

Publications (2)

Publication Number Publication Date
EP2314419A1 true EP2314419A1 (fr) 2011-04-27
EP2314419B1 EP2314419B1 (fr) 2014-05-07

Family

ID=43513743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100187470 Active EP2314419B1 (fr) 2009-10-21 2010-10-13 Machine-outil électrique

Country Status (2)

Country Link
EP (1) EP2314419B1 (fr)
DE (1) DE102009050013A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9873192B2 (en) 2013-12-11 2018-01-23 Black & Decker Inc. Rotary hammer
EP3875224A1 (fr) * 2020-03-03 2021-09-08 Hilti Aktiengesellschaft Dispositif de réglage d'un ciseau

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19724531A1 (de) * 1997-06-11 1998-12-17 Bosch Gmbh Robert Bohrhammer
US6223833B1 (en) * 1999-06-03 2001-05-01 One World Technologies, Inc. Spindle lock and chipping mechanism for hammer drill
EP1661667A1 (fr) * 2004-11-24 2006-05-31 Hitachi Koki Co., Ltd. Marteau perforateur avec dispositif de commutation du mode de fonctionnement
US20070074883A1 (en) * 2004-03-13 2007-04-05 Andreas Strasser Hand-held power tool
US20090223692A1 (en) * 2008-03-05 2009-09-10 Makita Corporation Hammer Drill

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4205840C2 (de) * 1992-02-26 1996-10-24 Kress Elektrik Gmbh & Co Bohrhammer mit Meißelfunktion
DE10205030A1 (de) * 2002-02-07 2003-08-21 Hilti Ag Betriebsmodi-Schalteinheit einer Handwerkzeugmaschine
DE10355107B3 (de) * 2003-11-24 2005-08-11 Itw-Befestigungssysteme Gmbh Selektordrehschalter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19724531A1 (de) * 1997-06-11 1998-12-17 Bosch Gmbh Robert Bohrhammer
US6223833B1 (en) * 1999-06-03 2001-05-01 One World Technologies, Inc. Spindle lock and chipping mechanism for hammer drill
US20070074883A1 (en) * 2004-03-13 2007-04-05 Andreas Strasser Hand-held power tool
EP1661667A1 (fr) * 2004-11-24 2006-05-31 Hitachi Koki Co., Ltd. Marteau perforateur avec dispositif de commutation du mode de fonctionnement
US20090223692A1 (en) * 2008-03-05 2009-09-10 Makita Corporation Hammer Drill

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9873192B2 (en) 2013-12-11 2018-01-23 Black & Decker Inc. Rotary hammer
EP3875224A1 (fr) * 2020-03-03 2021-09-08 Hilti Aktiengesellschaft Dispositif de réglage d'un ciseau
WO2021175657A1 (fr) * 2020-03-03 2021-09-10 Hilti Aktiengesellschaft Dispositif de réinitialisation de burin
US12023793B2 (en) 2020-03-03 2024-07-02 Hilti Aktiengesellschaft Apparatus for adjusting a chisel

Also Published As

Publication number Publication date
EP2314419B1 (fr) 2014-05-07
DE102009050013A1 (de) 2011-04-28

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