EP2282864A1 - Machine-outil, en particulier machine-outil portative - Google Patents

Machine-outil, en particulier machine-outil portative

Info

Publication number
EP2282864A1
EP2282864A1 EP09745600A EP09745600A EP2282864A1 EP 2282864 A1 EP2282864 A1 EP 2282864A1 EP 09745600 A EP09745600 A EP 09745600A EP 09745600 A EP09745600 A EP 09745600A EP 2282864 A1 EP2282864 A1 EP 2282864A1
Authority
EP
European Patent Office
Prior art keywords
saw blade
support
machine tool
tool according
rotation
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.)
Withdrawn
Application number
EP09745600A
Other languages
German (de)
English (en)
Inventor
Hans Kaiser
Thilo Koeder
Joachim Platzer
Ulli Hoffmann
Jan Koegel
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 EP2282864A1 publication Critical patent/EP2282864A1/fr
Withdrawn legal-status Critical Current

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
    • B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
    • B23D51/02—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of beds; of guiding arrangements for work-tables or saw carriers; of frames
    • B23D51/025—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of beds; of guiding arrangements for work-tables or saw carriers; of frames of arrangements for guiding the saw blade
    • 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 1 598 136 B1, in the embodiment as a jigsaw, in which the saw blade is driven in a liftable manner and works in exclusively stroke-mobile drive in normal operation. If the liftable drive can be overlaid with a pivoting movement about a pivot axis lying transversely to the saw blade plane, then the jigsaw operates in pendulum stroke mode. In another mode, the jigsaw works as a so-called scrolling jigsaw.
  • a rotatability of the same is given by a rotation axis extending in its longitudinal direction, so that the respective working direction is essentially predetermined by rotation of the saw blade.
  • the saw blade is acted upon on the back side via a support with a support arrangement which is fixed concentrically co-rotating relative to the saw blade or the lifting rod of the saw blade and which has a support roller acting as the saw blade back.
  • This is supported on a running in the longitudinal direction of the axis of rotation arm, which has a small pivoting movement in the direction of the saw blade plane.
  • the invention is based, at least without further complication of the structure improved conditions for the creation of different support conditions to achieve the task.
  • the saw blade is driven via the support arrangement in the direction of rotation.
  • the support arrangement so that in the position of its axis of rotation independent arrangement for lifting rod and possibly also on the housing side Hubstangen exchange is possible without the need to dispense with respect to the rotation and because of the rotation of the support structure and the saw blade to each other on a common drive, a forced coupling with respect to Turnability about a common axis but avoided.
  • the initiation of the rotational forces takes place via the support, so that more favorable loading conditions for the saw blade result, also due to the decoupling of the relative to the
  • the decoupling can be achieved within the scope of the invention in a simple manner with respect to the rotatability by a sleeve guide.
  • the saw blade holder can be designed so that the saw blade is held rotatably about this about its axis.
  • the support arrangement it proves to be expedient for the support arrangement to provide a guide along a guideway which partially surrounds the saw blade and whose pole at least in the region of the axis of rotation of the saw blade, wherein the guideway in its course can also be realized with different distances to the pole, in order to influence the Abstweiltechnik in this way.
  • the guideway is expediently designed as a slotted guide.
  • a support arm which is supported against the saw blade back via a support member which is designed in particular as a support roller.
  • the support roller may be circumferentially provided with a guide groove into which the saw blade is immersed on the back, so that there is a support between the support roller and saw blade also transversely to the saw blade level.
  • the support roller with circumferentially vaulted contour, expediently such that the peripheral curvature has a rounding radius whose size corresponds to the distance of the axis of rotation of the saw blade to the saw blade back, wherein against the edges the concavity running also a stronger curvature may be appropriate.
  • an embodiment proves to be advantageous as a support fork, which is held in the region of their webs on sliding blocks in the guide slot, which can be used as sliding blocks pegs, rollers or the like, which are designed in particular as resilient and thus play balancing guide body can.
  • the support arm can preferably be provided in addition to the guide on the guide slot and a rotatable support to the housing of the machine, in particular to the housing-side Hubstangen arrangement that for stabilizing the position of the support arm - A -
  • the rotational position of the drive assembly is advantageously via an actuator which engages the drive assembly, in particular on the support arm or on the drive arm which receives the guide slot for the support arm.
  • FIG. 1 is a schematic representation of a designed as a hand-held machine tool electrically driven jigsaw, are provided for the different modes of operation,
  • Fig. 4 is a FIGS. 2 and 3 corresponding arrangement with a bridge-like support of the support arm of the support assembly, and 5 shows a further illustration of the assignment of the saw blade to a support element of the support arrangement.
  • FIG. 1 illustrates, as an example of a machine tool, a hand-held machine in the form of a jigsaw 2, which has a housing 3 and which is supported on a workpiece 5 via a foot plate 4.
  • this In the forward direction of the jigsaw 2, this has a saw blade 8 as a working tool 7. This engages in the working operation on the workpiece 5, on which the jigsaw 2 is slidably supported on the base plate 4.
  • a handle 11 is provided in the high direction opposite to the lockable about a running in the direction of the longitudinal axis of the jigsaw 2 pivot axis base plate 4, the handle bar 12 tapers to a guide knob 14.
  • a switch assembly 15 is provided, via which the jigsaw 2 on and off. Different operating modes of the jigsaw 2 can be adjusted via the switching device 16 provided on the housing 3 on the longitudinal side.
  • the end wall portion 13 of the housing 3 is tapered to the base plate 4 stepped against the working direction.
  • the step 17 covers the tool holder 18 for the driven working tool 7 formed by the saw blade 8.
  • the saw blade 8 of the total electrically operated machine tool 1 has a basic working position, in which, as indicated by the arrow 19, driven only liftable and aligned in the direction of the longitudinal axis of the jigsaw 2, not shown.
  • the back 9 of the saw blade 8 is associated with a support 20, which comprises a support arrangement 37.
  • the support 20 is via a drive, not shown, in the direction of the plane the saw blade 8 driven to lift (arrow 23).
  • the saw blade 8 is pivotable in addition to the lifting movement in the direction of its longitudinal axis about an axis of rotation 22 extending in its direction, which is indicated schematically in FIG.
  • the saw blade 8 in its basic work position corresponding straight-ahead direction according to arrow 6 angular directions of operation adjustable so that the jigsaw 2 is used as a so-called “scrolling Jigsaw” and operated in accordance with controlled adjustment of the saw blade 8 as a semi-autonomous jigsaw 2
  • the user holding the jigsaw 2 essentially only takes over the feed, which is roughly aligned with the working direction, while an exact positioning oriented by way of a path is achieved by adjusting the saw blade 8 to a rotational position corresponding to this path specification.
  • Fig. 2 and 3 illustrate the support 20 with its support assembly 37.
  • the support 20 includes the pendulum stroke in the direction of arrow 23 liftably driven drive arm 24 which terminates in one of the drive assembly 37 associated, designed as a guide slot 25 guideway 26.
  • the guideway 26 extends at least approximately semicircular around the axis of rotation 22 of the saw blade 8. Guided are in the provided on the drive arm 24 guide slot 25 of the guideway 26 sliding blocks 27 which are provided on a support arm 28.
  • the sliding blocks 27 are formed in the embodiment by two support pins 29 which are spaced apart in the direction of extension of the guide track 26.
  • the support arm 28 extends from the drive arm 24 against the saw blade 8 and runs against the saw blade 8 in fork arms 30, between which in the embodiment of FIG.
  • the guide roller 32 has a guide groove on the circumference, in which the saw blade 8 engages with its saw blade back 9 and which engages over the flanks of the saw blade 8 in the back region.
  • the roller-shaped, rotationally or fixedly arranged guide body 33 has on the circumference a concave vaulted support surface 34, as illustrated in particular in the schematic illustration of FIG. 5.
  • the saw blade 8 is on the back side, and only with its saw blade back 9. This is, as FIG. 5 shows, preferably rounded, so that the guideway 34 results in only one line contact.
  • the guideway 34 proves in coordination with the respective to be supported
  • Saw blade 8 a contour course as appropriate, which corresponds approximately to a circular arc around the axis of rotation 22 of the saw blade 8 with a radius which - see Fig. 5 - at least approximately the distance of the rotation axis 22 corresponds to the blade back 9 in its vertex.
  • Fig. 4 shows in addition to Figs. 2 and 3, an embodiment of the support 20, in which the support arm 28 is guided and supported not only to the drive arm 24 via the guide track 26, but also via a bracket 35, which is attached to the support arm 28 in the Substantially coaxial with the axis of rotation 22 via a sleeve 38 is rotatably guided, wherein the sleeve 38 is mounted for example on the lifting rod 36 or in a corresponding manner in a not shown, the guide for the lifting rod 36 holder containing in Pendelhub ceremonies with the
  • Lifting rod 36 is pivotable.
  • This configuration of the support 20 this is stabilized in position relative to the saw blade 8, especially against tilting forces, as they occur in particular both in Pendelhub plante, but also in the rotation of the saw blade 8 on the support assembly 37, if over this invention, the adjustment of the saw blade 8 takes place on the respective desired rotational position.
  • Pendulum lifting operation as well as for a combination of the pendulum stroke with the scrolling mode, it is different from the embodiment shown in Figure 4 necessary to record the created via the bracket 35 rigid support between sleeve 38 and support arm 28 or sleeve 38 and drive arm 24, For example, not shown, corresponding Winkelver dichkeits enabling connections, such as joints and / or pivotal connections.
  • the inventive adjustment of the saw blade 8 on the support assembly 37 in the direction of rotation requires only schematically indicated actuator 39, adjusted in the scrolling mode of the support arm 28 with the illustrated support member 31 with a corresponding rotation of the saw blade 8 about its axis of rotation 22 in the respective predetermined rotational position is, over the guide rail 26 and the optionally provided Drehabstützung on the bracket 35, the required guidance of the support arm 28 is ensured. If, as shown, applied in the scrolling mode of the support arm 28 via the actuator 39, the drive arm is held firmly in position, for example with respect to the machine housing, which is not shown.
  • support pin 29 as engaging in the track 26 of the guide slot 25 parts is only for example; Instead of such support pin 29, other shape elements, such as adapted in radius shapes on the support arm 28 or spring bolts can be used, which also allow a certain elasticity in the back-side support of the saw blade 8.

Landscapes

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

Abstract

L'invention concerne une machine-outil (1) se présentant sous la forme d'une scie sauteuse (2). Cette machine-outil comporte un système d'appui (20) qui assure un appui pour le dos de la lame (8) perpendiculairement à l'axe de rotation (22) de la lame (8). Ce système d'appui (20) entraîné permet de placer la lame (8) dans plusieurs positions angulaires dans le sens de rotation autour de son axe de rotation (22)
EP09745600A 2008-05-14 2009-03-16 Machine-outil, en particulier machine-outil portative Withdrawn EP2282864A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008001772A DE102008001772A1 (de) 2008-05-14 2008-05-14 Werkzeugmaschine, insbesondere handgehaltene Werkzeugmaschine
PCT/EP2009/053038 WO2009138267A1 (fr) 2008-05-14 2009-03-16 Machine-outil, en particulier machine-outil portative

Publications (1)

Publication Number Publication Date
EP2282864A1 true EP2282864A1 (fr) 2011-02-16

Family

ID=40684316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09745600A Withdrawn EP2282864A1 (fr) 2008-05-14 2009-03-16 Machine-outil, en particulier machine-outil portative

Country Status (7)

Country Link
US (1) US20110119933A1 (fr)
EP (1) EP2282864A1 (fr)
JP (1) JP2011520626A (fr)
CN (1) CN102026759B (fr)
DE (1) DE102008001772A1 (fr)
RU (1) RU2010150849A (fr)
WO (1) WO2009138267A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008002678A1 (de) * 2008-06-26 2009-12-31 Robert Bosch Gmbh Handhubsägemaschine
JP2013052575A (ja) * 2011-09-02 2013-03-21 Kishimoto Nokogu Seisakusho:Kk 鋸刃

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1940483A (en) * 1931-01-14 1933-12-19 Maimin Company Inc H Cloth cutting machine
US3038508A (en) * 1960-09-21 1962-06-12 Lawrence J Moran Guide for jigsaw blade
US3230022A (en) * 1962-12-14 1966-01-18 Eastern Prod Corp Bearing
US3260290A (en) * 1964-04-16 1966-07-12 Singer Co Attachment for sabre saw for flush cutting and side cutting
US3494391A (en) * 1968-04-24 1970-02-10 Singer Co Sabre saws with 360 degree swivel saw bars
US3542097A (en) * 1968-05-02 1970-11-24 Singer Co Chuck assembly for sabre saws
US3547166A (en) * 1968-07-03 1970-12-15 Singer Co Chuck attachment for sabre saws
US4091701A (en) * 1976-11-01 1978-05-30 Gerber Garment Technology, Inc. Cutting machine having roller blade guide
US4327621A (en) * 1979-10-26 1982-05-04 Hobart Corporation Self steering blade guide for a band saw
US4545123A (en) * 1984-04-09 1985-10-08 Skil Corporation Combination jig saw adjusting mechanism
DE3635470A1 (de) * 1986-10-18 1988-04-21 Licentia Gmbh Stichsaege
JPH0755468B2 (ja) * 1989-09-20 1995-06-14 株式会社川上製作所 積層物の裁断装置
DK0679483T3 (da) * 1994-04-26 1998-05-04 Investronica Sa Styreindretning til kniv ophængt i en skæremaskine til skæring af materialeark
US5462368A (en) * 1994-08-29 1995-10-31 Harken, Inc. Ball bearing block having self-contained bearings
JP4248766B2 (ja) * 2001-05-23 2009-04-02 株式会社マキタ 往復動切断工具
GB2394692B (en) * 2002-10-28 2005-08-17 Black & Decker Inc Support mechanism for reciprocating tool and tool incorporating such mechanism
GB2399314B (en) * 2003-03-13 2005-02-23 Black & Decker Inc Power tool having rotatable adjustment means for working member
US7234243B2 (en) * 2003-06-25 2007-06-26 Credo Technology Corporation Reciprocating cutting tool with orbital action
GB0405729D0 (en) * 2004-03-15 2004-04-21 Gmca Pty Ltd Power tool bearing arrangement
DE602004012977T2 (de) * 2004-05-18 2009-05-20 Black & Decker Inc., Newark Kraftwerkzeug mit einem Betriebsartauswahlmechanismus
EP1598136B1 (fr) 2004-05-18 2006-09-27 BLACK & DECKER INC. Assemblage d'un arbre de sortie et outil motorisé avec un tel assemblage
GB2431613A (en) * 2005-10-28 2007-05-02 Black & Decker Inc Blade clamp for a reciprocating saw

Non-Patent Citations (1)

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Title
See references of WO2009138267A1 *

Also Published As

Publication number Publication date
DE102008001772A1 (de) 2009-11-19
US20110119933A1 (en) 2011-05-26
RU2010150849A (ru) 2012-06-20
CN102026759A (zh) 2011-04-20
CN102026759B (zh) 2013-03-06
WO2009138267A1 (fr) 2009-11-19
JP2011520626A (ja) 2011-07-21

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