WO2009138272A1 - Machine-outil, en particulier machine-outil portative - Google Patents

Machine-outil, en particulier machine-outil portative Download PDF

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Publication number
WO2009138272A1
WO2009138272A1 PCT/EP2009/053050 EP2009053050W WO2009138272A1 WO 2009138272 A1 WO2009138272 A1 WO 2009138272A1 EP 2009053050 W EP2009053050 W EP 2009053050W WO 2009138272 A1 WO2009138272 A1 WO 2009138272A1
Authority
WO
WIPO (PCT)
Prior art keywords
machine tool
drive member
working
locking
tool according
Prior art date
Application number
PCT/EP2009/053050
Other languages
German (de)
English (en)
Inventor
Thilo Koeder
Joachim Platzer
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
Priority to CN2009801171438A priority Critical patent/CN102026760A/zh
Priority to EP09745605A priority patent/EP2288461A1/fr
Publication of WO2009138272A1 publication Critical patent/WO2009138272A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D49/00—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws
    • B23D49/10—Hand-held or hand-operated sawing devices with straight saw blades
    • B23D49/16—Hand-held or hand-operated sawing devices with straight saw blades actuated by electric or magnetic power or prime movers
    • B23D49/162—Pad sawing devices
    • B23D49/167—Pad sawing devices with means to adjust the guide plate or with means to adjust the plane in which the saw blade moves

Definitions

  • Machine tool in particular hand-held machine tool
  • the invention relates to a machine tool, in particular a hand-held machine tool, according to the preamble of claim 1.
  • Machine tools of the aforementioned type are known from EP 1 598 126 Bl. They are designed as jigsaws, in which as lifting movement to be driven working tool a saw blade is provided, which is acted upon by a lifting rod to be driven stroke as a drive member.
  • the jigsaw With exclusively liftable drive of the saw blade, the jigsaw operates in normal operation, i. with aligned in the direction of the longitudinal axis of the jigsaw saw blade. Is the liftable drive with in the direction of the longitudinal axis of
  • Another mode of operation is when the jigsaw is operated manually or autonomously as a so-called scrolling jig saw. Then, in addition to the lifting drive of the saw blade, a rotatability of the saw blade is provided about a rotational axis extending in its longitudinal direction, so that the respective working direction is essentially to be adjusted by rotation of the saw blade.
  • This rotatability of the saw blade about its longitudinal axis is locked in normal mode and difficult to realize in Pendelhubmodus, and it is therefore provided a locking arrangement over which the drive member in the form of the lifting rod and the working tool in the form of the saw blade in its rotational position to each other are set.
  • Locking arrangement has locking elements which are supported against one another via support zones lying opposite one another in the direction of rotation, one of which is provided on a receiving opening and the other on an engagement part.
  • the invention is based on the object, a machine tool of the type mentioned, which is to operate in different modes, to the effect that on the locking arrangement in those modes in which a rotation of the working tool, ie in jigsaws of the saw blade should be excluded , Given a backlash-free fixation of the corresponding degree of freedom and thus a rotational position-stable alignment of the working tool is ensured.
  • This is achieved with the features of claim 1, according to which the locking arrangement with respect to at least one of its locking elements in the direction of engagement with the other locking element has opposite and converging transverse to the direction of rotation support zones which are inserted positively against the support zones of the other locking element.
  • a fixation can also be done via a clamp, for example via radial access to the lifting rod jaws, which may be appropriate in terms of other additional functions, such as the determination of the lifting rod in other rotational positions, which also dictated by its such clamping bracket rotation play areas can be.
  • the form-fitting connection achieved thereby precludes rotational play, which could affect the functionality of the machine tool and can therefore be used with advantage for calibrating the machine tool and for defining a reference point, in particular the zero point in a machine tool, as in the known solution in different modes to be operated, and this also with possibly automated or semi-automated guidance of the machine tool.
  • the locking arrangement can be used both for rotational fixing of a liftably driven drive member or tool, as well as in embodiments in which the rotational position fixing of the drive member or tool takes place through the intermediary of a connecting element which lies between the locking arrangement and the drive member or tool and displaceable in the stroke direction, but rotatably fixed to the drive member or tool, so does not participate Hubzien of drive member or tool and thus works hublagenfest.
  • the arrangement of one of the locking elements, preferably the receiving opening on the connecting element also offers the possibility of access to the receiving opening - A -
  • Fig. 1 is a schematic representation of the hand-guided
  • Machine tool configured, electrically driven jigsaw, for the different
  • Fig. 2 is a schematic representation of provided for the guidance and operation of the saw blade
  • FIG. 3 and 4 is an illustration of the detail A of the locking arrangement used in Fig. 2 in side view and plan view
  • 5 and 6 are schematic representations of different locking arrangements.
  • Fig. 1 is a hand-held machine tool 1 a
  • Jigsaw 2 shown, which has a housing 3 and which is slidably supported on a workpiece 5 on a base plate 4. In front in the working direction 6 area of the jigsaw 2, this has a saw blade 8 as a working tool 7. This engages in the work operation in the workpiece 5.
  • a bow-shaped handle 11 is provided, the handle bar 12 extends in the working direction 6 and the front in the End wall portion 13 of the housing 3 enters. This runs upwards in a guide knob 14. In the region of the handle 11 is substantially below the handle bar 12 a
  • Switch arrangement 15 is provided, via which the jigsaw 2 is switched on and off. Different operating modes of the jigsaw 2 can be adjusted by means of the switching device 16 provided longitudinally on the housing 3.
  • the end wall portion 13 of the housing 3 is discontinuously tapered stepped against the base plate 4.
  • the counter to the working direction 6 extending step 17 covers the tool holder 18, over which the intended as a working tool 7 saw blade 8 is held.
  • the saw blade 8 is driven to lift (arrow 19). Further, the saw blade 8 is about a transverse to the saw blade plane, ie also transverse to the sawing direction pivot axis, which is not shown, via an actuator 20 liftable (arrow 23). Not shown in Fig. 1 further comprises a pivot drive, via which the saw blade 8, as illustrated by the arrow 21 to a in the direction of its longitudinal axis extending axis of rotation 22 is pivotable, whereby the saw blade 8 is adjustable in its straightforward working angular directions of operation. According to this structure, the jigsaw 2 can be operated in different ways, once in the straight ahead working direction in the working direction 6 extending plane of the saw blade 8.
  • Rotary shaft 22 may only be enabled for scrolling mode.
  • Fig. 2 shows in a highly simplified representation as a drive member 10 in the extension of a liftable in the direction of arrow 19 driven lifting rod 24 lying
  • the lifting drive for the lifting rod 24 is indicated at 25. Furthermore, the lifting rod 24 is on the housing side a bearing 27 pivotally supported for the pendulum lifting operation. The relevant, to the rotation axis 22 perpendicular pivot axis is indicated at 28. At the back 9 of the saw blade 8, which is held in the saw blade holder 18, engages the support 20, over which the saw blade 8 with the lifting rod 24 in Pendelhub ceremonies in the direction of arrow 23 is adjustable.
  • the rotation of the saw blade 8 about the axis of rotation 22 via a connecting element 29 which is rotatably driven in the direction of arrow 21 about the axis of rotation 22 and in turn to the lifting rod 24 in the stroke direction (arrow 19) is displaceable, with respect to the direction of rotation 21 and the axis of rotation 22 but rotatably fixed to the lifting rod 24.
  • Fig. 2 shows a locking arrangement 31 in the diagram, as it can be used for direct locking of the lifting rod 24.
  • Fig. 5 illustrates the connecting element 29 with engaging thereon locking arrangement 30.
  • Locking arrangement 30 comprises two locking elements 32, 33, wherein the locking element 32 is illustrated as extending to the connecting element 29 cantilever and a receiving opening 34 includes.
  • the locking element 32 is also fixed in the stroke direction, while the locking element 33 is liftably adjustable as illustrated by the arrow 36.
  • This can do that Engagement member 35 are adjusted from its positive engagement position to the receiving opening 34, so that a rotation of the saw blade 8 about the rotation axis 22 is possible.
  • the engagement member 35 is loaded in its engaged position to the receiving opening 34 via a resilient support 37. The measures provided for adjusting the engagement member in the direction of arrow 36 adjusting device is not shown.
  • Fig. 5 shows that the receiving opening 34 and the engaging member 35 in the direction of their engagement position transversely to the direction of rotation 21 extending support zones 38 have. These are made relatively steep, so that torque to be sustained only relatively small lifting forces result, which can be intercepted by the resilient support 37 even with weak spring design.
  • the schematic representation according to FIG. 5 corresponds to the illustration of the locking arrangement 30 in FIGS. 2 to 4, for which reason corresponding reference symbols are used.
  • the locking member 32 to the sleeve-shaped connecting element 29 is fixed in position and includes the receiving opening 34 into which the engagement member 35 engages, which is not supported by the resilient support 37 against the connecting element 29, but via a housing-side support 39th
  • the conicity of the connecting elements 32 is also expedient with regard to the alignment with the respective engagement position, and it is therefore also designed in the longitudinal direction of the lifting rod 24 receiving opening 41 of the locking element 40 in cross-section wedge-shaped.
  • an engagement member 43 is provided, which may be wedge-shaped or pin-shaped and terminates in its intended here pin-shaped formation in a tip 44 whose tip angle corresponds to the wedge angle of the receiving opening 41 at least almost.
  • the principle of the locking arrangement according to FIG. 6 corresponds to that according to FIG. 5 and in the illustration according to FIG. 6, the spring loading of the engagement part 43 is not shown for the sake of simplicity, as is the adjusting device associated therewith.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)

Abstract

L'invention concerne une machine-outil (1) portative, se présentant par exemple sous la forme d'une scie sauteuse (2), d'une grignoteuse ou d'une cisaille, comportant un outil de travail (7) entraîné de façon à effectuer un mouvement alternatif et une rotation autour d'un axe de rotation (22) parallèle à l'axe du mouvement alternatif. Cette machine-outil (1) présente un système de verrouillage (31) qui permet, sans jeu, de bloquer une position de rotation de l'outil de travail (7) indépendamment du mouvement alternatif.
PCT/EP2009/053050 2008-05-14 2009-03-16 Machine-outil, en particulier machine-outil portative WO2009138272A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2009801171438A CN102026760A (zh) 2008-05-14 2009-03-16 工具机、尤其手持式工具机
EP09745605A EP2288461A1 (fr) 2008-05-14 2009-03-16 Machine-outil, en particulier machine-outil portative

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008001775.2 2008-05-14
DE200810001775 DE102008001775A1 (de) 2008-05-14 2008-05-14 Werkzeugmaschine, insbesondere handgehaltene Werkzeugmaschine

Publications (1)

Publication Number Publication Date
WO2009138272A1 true WO2009138272A1 (fr) 2009-11-19

Family

ID=40578785

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/053050 WO2009138272A1 (fr) 2008-05-14 2009-03-16 Machine-outil, en particulier machine-outil portative

Country Status (5)

Country Link
EP (1) EP2288461A1 (fr)
CN (1) CN102026760A (fr)
DE (1) DE102008001775A1 (fr)
RU (1) RU2010150843A (fr)
WO (1) WO2009138272A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011018277A1 (fr) * 2009-08-14 2011-02-17 Robert Bosch Gmbh Dispositif de scie, en particulier dispositif de scie à guichet

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3448781A (en) * 1966-10-21 1969-06-10 John J Angelucci Motor driven reciprocating saw having rotatable blade
CA965334A (en) * 1972-03-09 1975-04-01 William A. Batson Sabre saws with lockable swivel saw bars
EP1598136A1 (fr) * 2004-05-18 2005-11-23 BLACK & DECKER INC. Assemblage d'un arbre de sortie et outil motorisé avec un tel assemblage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3448781A (en) * 1966-10-21 1969-06-10 John J Angelucci Motor driven reciprocating saw having rotatable blade
CA965334A (en) * 1972-03-09 1975-04-01 William A. Batson Sabre saws with lockable swivel saw bars
EP1598136A1 (fr) * 2004-05-18 2005-11-23 BLACK & DECKER INC. Assemblage d'un arbre de sortie et outil motorisé avec un tel assemblage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011018277A1 (fr) * 2009-08-14 2011-02-17 Robert Bosch Gmbh Dispositif de scie, en particulier dispositif de scie à guichet

Also Published As

Publication number Publication date
CN102026760A (zh) 2011-04-20
RU2010150843A (ru) 2012-06-20
DE102008001775A1 (de) 2009-11-19
EP2288461A1 (fr) 2011-03-02

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