WO2007131831A1 - Machine-outil à main avec outil entraîné en oscillation et en mouvement pendulaire - Google Patents

Machine-outil à main avec outil entraîné en oscillation et en mouvement pendulaire Download PDF

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Publication number
WO2007131831A1
WO2007131831A1 PCT/EP2007/052967 EP2007052967W WO2007131831A1 WO 2007131831 A1 WO2007131831 A1 WO 2007131831A1 EP 2007052967 W EP2007052967 W EP 2007052967W WO 2007131831 A1 WO2007131831 A1 WO 2007131831A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool
tool according
hand tool
drive motor
hand
Prior art date
Application number
PCT/EP2007/052967
Other languages
German (de)
English (en)
Inventor
Steffen Wuensch
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 DE502007004574T priority Critical patent/DE502007004574D1/de
Priority to EP07727439A priority patent/EP2024150B1/fr
Priority to CN2007800175663A priority patent/CN101443166B/zh
Publication of WO2007131831A1 publication Critical patent/WO2007131831A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B19/00—Other reciprocating saws with power drive; Fret-saws
    • B27B19/006—Other reciprocating saws with power drive; Fret-saws with oscillating saw blades; Hand saws with oscillating saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
    • B27C1/00—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor
    • B27C1/002—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor with non-rotating tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27F—DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
    • B27F5/00—Slotted or mortised work
    • B27F5/02—Slotting or mortising machines tools therefor
    • B27F5/10—Slotting or mortising machines tools therefor equipped with chisel cutters, e.g. hollow chisel cutters equipped with drills

Definitions

  • the invention relates to a hand tool according to the preamble of claim 1.
  • Pendulum jigsaws are known in which the saw blade exerts an oscillating movement along its longitudinal axis, wherein this oscillating movement is superimposed on a pendulum motion to engage a sawtooth blade of the saw blade in the cutting stroke with the workpiece and lift something off the workpiece during the backward stroke.
  • the known jigsaws can only be equipped with saw blades and used for cutting workpieces, but are not suitable for other material processing methods, such as grinding or scraping.
  • the present invention seeks to improve a hand tool of the type mentioned in that it allows not only to cut workpieces, but also to produce joints and recesses in the workpieces, and that they not only to another can be equipped with a sawing tool but also with different cutting tools and with grinding and scraping tools, so that the hand tool is suitable for performing a variety of different jobs and therefore has a great versatility. Disclosure of the invention
  • the tool oscillates or pivots about a pivot axis during its oscillating movement, which moves back and forth along a movement path, this movement path preferably being at a significant distance from a machining edge, for example a sawtooth. or a cutting surface, or a processing surface, for example a grinding surface, of the tool is arranged and is aligned generally parallel thereto.
  • the pivot axis between two mutually arranged lever arms of a two-armed lever is arranged, one of which carries the tool and the other forms a push rod of a Geradschubkurbel.
  • a first end of the push rod is pivotally guided about the pivot axis along the path of movement, while the opposite second end of the push rod is articulated eccentrically on a drive crank rotatably driven drive crank, so that it describes a circular path during operation of the drive motor.
  • the longitudinal axis of the lever arm serving as a tool carrier is preferably oriented at right angles to the longitudinal axis of the push rod, while the machining edge or surface of the tool is preferably aligned at right angles to the longitudinal axis of the serving as a tool carrier lever arm.
  • deviations from these angles are possible.
  • the center of the circular path can be either on the preferably rectilinear trajectory of the pivot axis or in relation to this have a lateral offset, as well as by changing the eccentricity of the drive crank and / or the ratio of the lengths of the push rod and the tool carrier, the shape of the trajectories from individual points on the machining edge or machining surface of the tool can be changed.
  • the tool carrier and / or the tool preferably has mass balancing devices which are expediently arranged at least partially on the side of the pivot axis opposite the machining edge or machining surface of the tool.
  • a continuous jerk-free immersion of the tool into a workpiece and a machining of the workpiece to corners and edges is possible, especially if the machining edge of the tool according to an advantageous embodiment of the invention after attachment of the tool on the tool carrier T-shaped opposite sides over the tool carrier protrudes. If the tool is designed cranked according to a further advantageous embodiment of the invention, also a clearing or editing of grooves with a predetermined by the cranking maximum depth is possible.
  • the tool and in particular a sawing tool, may alternatively have either a straight, a convex or a concave machining edge, so that workpieces with a convex or concave shape can be optimally machined by selecting a correspondingly adapted tool.
  • the pendulum motion of such a tool also ensures a clean cut and minimizes the tendency to jamming due to the good clearance of the kerf.
  • a further preferred embodiment of the invention provides that in particular sawing, cutting or scraping tools have an elongated machining edge or cutting edge, which is aligned after attachment to the tool carrier generally parallel to a longitudinal axis of the power tool and arranged at a lateral distance from this, which for a favorable center of gravity of the machine tool sogt and a comfortable handling and one-handed operation allows.
  • the machine tool can also comprise a receptacle for the tool, which can be mounted rotated by 180 degrees in different orientation on the tool carrier, so that an adaptation of the machine tool to right and left-handers and processing to every corner is possible.
  • a receptacle for the tool which can be mounted rotated by 180 degrees in different orientation on the tool carrier, so that an adaptation of the machine tool to right and left-handers and processing to every corner is possible.
  • Fig. 1 is a perspective view of a hand tool
  • FIG. 2 shows a schematic representation of a transmission model of the handheld power tool
  • 3a and 3b show a side view and a cross-sectional view of teeth of a sawing tool attached to the machine tool in Fig. 1;
  • 4a to 4c are side views of alternative tooth shapes of teeth of the sawing tool
  • FIGS. 5 to 17 trajectories of teeth of the sawing tool mounted on the machine tool as a function of various parameters of the machine tool and of the sawing tool.
  • the hand tool 2 shown in Fig. 1 is used for material processing by sawing, grinding or scraping and emergency repairs.
  • the hand tool 2 is shown in Fig. 1 in the form of a populated with a cranked sawing tool 4 off-grid battery device, but can also be designed with a grinding or scraping tool or as an electrical appliance with a cable for connection to a power grid.
  • the machine tool 2 consists of a closed, substantially elongated cylindrical plastic housing 6, arranged at a front end of the housing 6 removable battery pack 8, arranged at the other end of the housing 6 processing head 10 with a laterally disposed Tool holder 12 for exchangeable attachment of the Tool 4, a housed in the interior of the housing 6 electric drive motor (not visible) and arranged between the drive motor and the tool carrier 12 thrust crank 14, which is shown schematically in Fig. 2 together with the tool 4.
  • the slider crank drive 14 consists essentially of a drive crank via an angular reduction gear about a rotation axis 16 rotatably driven drive crank 18, an angled two-armed lever 20, one lever arm 22 serves as a tool carrier 12 and carries the tool 4, and the other lever arm 24, the push rod of Thrust crank 14 forms, and a guide slot 26 for a between the two lever arms 22, 24 arranged part 28 of the lever 20th
  • the drive crank 18 may be formed as an eccentric disc with an eccentric to the rotation axis 16 arranged pin 30 for articulation of the one end of the push rod 24 and directly on the free end of an output shaft of the reduction gear (not shown) sit, the eccentricity e of the pin 30 in conjunction with the speed of the drive crank 18 is an essential parameter for the length of travel of an oscillating motion of a workpiece engaging sawtooth cutting edge 32 of the sawing tool 4 shown in FIG. 1 or a corresponding machining edge or machining surface of another tool, for example a grinding surface or grinding edge a grinding tool is, and also determines their pendulum motion and their speed of movement.
  • the guide slot 26 is formed as a linear guide, in which a sliding block 34 is longitudinally movable in an axis parallel to a longitudinal axis 36 (Fig. 1) of the machine tool 2 axis 44, but in principle, a curved path of movement is possible.
  • the sliding block 34 and the lever 20 are connected by a pivot joint 38, the pivot axis 40 is aligned perpendicular to the longitudinal axis 36 of the machine tool 2, as shown in Fig. 1.
  • lever arms 22, 24 of the lever 20 are aligned perpendicular to each other, wherein serving as a push rod lever arm 24 has a length of Ll and is hinged at its free end on the pin 30 of the drive crank 18 so that this End of the lever arm 24 describes a circular path about the axis of rotation 16.
  • lever arm 22 is so matched to the associated tools, such as the tool 4, that the machining edge or processing surface, such as the SAge leopardschneide 32, arranged at a distance L2 from the pivot axis 40 of the pivot joint 38 and approximately parallel to the longitudinal axis 36th the machine tool 2 is aligned.
  • the machining edge or machining surface of the tool 4 projects beyond the tool carrier 12 to both sides, so that it encloses an angle ⁇ with the machining edge or machining surface.
  • the sawing tool 4 is provided to avoid vibrations on the sawtooth edge 32 opposite side of the pivot axis 40 with a mass balance portion 42 which is tuned with respect to its position and its mass to the oscillating overall system of tool 4 and lever 20
  • the mass balancing member 42 may either be part of the tool 4, as shown in FIG. 1, or alternatively formed at least in part by a mass balancing member (not shown) attached to the tool carrier 12 which, for example, is integrally molded as a diecast part in the manufacture of the lever 20 is formed on the lever arm 22 that it is beyond the pivot axis 40.
  • 4 additional measures for mass balance must be made to differently shaped or sized tools, since the mass balance element of the tool carrier 22 only provides for a basic balance.
  • the slider crank drive 14 serves to displace the tool 4, which is detachably fastened to the tool carrier 12, in an oscillating motion parallel to the longitudinal axis 36 of the machine tool 2 (double arrow A in FIG. 1) and this movement causes a pendulum or pivoting movement about the pivot axis 40 (double arrow B) in Fig. 1) to overlap.
  • these parameters are essentially the eccentricity e, the length Ll of the push rod 24 or the distance between the axis of rotation of the pin 30 and the pivot axis 40, and the angle .beta.
  • these parameters are essentially the distance L2 between the pivot axis 40 and the sawtooth edge 32 or the machining edge or surface of the tool 4, the angle ⁇ between the longitudinal axis of the tool Tool holder 12 and the machining edge or surface of the tool 4, the tool width Wa, as well as the shape of an envelope of the individual teeth of the sawtooth edge 32 and the individual points on the processing edge or surface, said envelope even, convex, as shown in FIG. 1, or even concave, the latter for example in a sawing tool for cutting through pipes or round bars.
  • the shape of the envelope is defined by its radius of curvature Rw, which is ⁇ at plane envelopes.
  • the determination of the individual quantities depends on the demands placed on the machine tool 2, e.g. By increasing the eccentricity e and decreasing the ratio of L1 / L2 in conjunction with a sawing tool 4 having an aggressive tooth shape, high cutting performance can be achieved in sawing suitable materials.
  • FIGS. 3a and 3b and FIGS. 4a, 4b and 4c show various shapes of teeth 46, 48, 50 of the sawtooth cutting edge 32 of different sawing tools 4, with which the machine tool 2 can be equipped.
  • FIGS. 3 a and 4 b and 4 c show a sawtooth cutting edge 32 in which all or part of the saw teeth 46 are formed as pointed teeth. This tooth form is universally applicable with limited cutout in milled or ground configuration, as shown in Fig. 3b, because it cuts equally well in both directions and prevents jamming of the tool 4.
  • teeth 48, 50 with a more aggressive tooth form, ie with a positive rake angle can be used for a high sawing progress, for example when sawing wood or plastic, as shown in FIG 4a, when these teeth 48 and 50 are effective in both cutting directions.
  • a more aggressive tooth form ie with a positive rake angle
  • the trajectories of points on both sides of the middle have opposite directions of movement; the trajectories of points in the middle and at the two opposite ends of the sawtooth cutting edge 32 have equally large oscillations in the direction of the oscillating motion, which are proportional to the eccentricity e;
  • the waveforms are basically not symmetrical to a central axis of the tool 4, but approach with increasing ratio L1 / L2 of a symmetrical shape;
  • the lengths of the trajectories can also be influenced by the ratio L1 / L2, with Ll ⁇ L2, the trajectories are extended, as shown in Figures 10, 10a and 11.
  • the angle ⁇ is changed or the distance a between the rotation axis 16 of the drive crank 18 and the pivot axis 40 is set greater than zero, the loop curves of the tooth tips in the center of the sawtooth cutting edge 32 change into flat ellipses, as in FIGS. 9, 12 and 15 to 17 shown.
  • a distance a one also obtains geometrically unequal curves for points to the right and left of the center of the sawtooth cutting edge 32, as shown in FIGS. 12 and 15 to 17.
  • Figures 12-17 show, in addition to the trajectories of three points in the middle and at the two opposite ends of the sawtooth edge 32, trajectories from further points in the right part of the sawtooth cutting edge 32.
  • Figs. 8b and 10a show only trajectories of points in the right Part of the sawtooth cutting edge 32.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
  • Milling Processes (AREA)

Abstract

L'invention concerne une machine-outil à main (2) avec un moteur d'entraînement et un outil (4) entraîné par un moteur d'entraînement, qui effectue pendant le fonctionnement du moteur d'entraînement un mouvement d'oscillation qui s'ajoute à un mouvement pendulaire. Conformément à l'invention, l'outil (4) oscille de manière pendulaire autour d'un axe de pivotement (40) qui se déplace d'avant en arrière le long d'une trajectoire de déplacement (44).
PCT/EP2007/052967 2006-05-16 2007-03-28 Machine-outil à main avec outil entraîné en oscillation et en mouvement pendulaire WO2007131831A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE502007004574T DE502007004574D1 (de) 2006-05-16 2007-03-28 Handwerkzeugmaschine mit oszillierend und pendelnd angetriebenem werkzeug
EP07727439A EP2024150B1 (fr) 2006-05-16 2007-03-28 Machine-outil à main avec outil entraîné en oscillation et en mouvement pendulaire
CN2007800175663A CN101443166B (zh) 2006-05-16 2007-03-28 具有振荡及摆动地被驱动的刀具的手持式工具机

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006022804.9 2006-05-16
DE200610022804 DE102006022804A1 (de) 2006-05-16 2006-05-16 Handwerkzeugmaschine mit oszillierend und pendelnd angetriebenem Werkzeug

Publications (1)

Publication Number Publication Date
WO2007131831A1 true WO2007131831A1 (fr) 2007-11-22

Family

ID=38185390

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/052967 WO2007131831A1 (fr) 2006-05-16 2007-03-28 Machine-outil à main avec outil entraîné en oscillation et en mouvement pendulaire

Country Status (4)

Country Link
EP (1) EP2024150B1 (fr)
CN (1) CN101443166B (fr)
DE (2) DE102006022804A1 (fr)
WO (1) WO2007131831A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9522432B2 (en) 2012-06-01 2016-12-20 Herbert W. Staub Cradle cutter

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010039786A1 (de) * 2010-08-26 2012-03-01 Robert Bosch Gmbh System mit zumindest zwei Oszillationseinsatzwerkzeugen
DE102010039787A1 (de) * 2010-08-26 2012-03-01 Robert Bosch Gmbh Handwerkzeugmaschine
US8881409B2 (en) * 2012-01-16 2014-11-11 Robert Bosch Gmbh Articulating oscillating power tool
DE102012221517A1 (de) * 2012-11-26 2014-05-28 Robert Bosch Gmbh Handwerkzeugmaschinenvorrichtung
DE102013113008A1 (de) 2013-11-25 2015-05-28 C. & E. Fein Gmbh Oszillationsantrieb
DE102017116823A1 (de) * 2017-07-25 2019-01-31 C. & E. Fein Gmbh Oszillierend angetriebene Werkzeugmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044171A (en) * 1961-07-17 1962-07-17 Howe Sound Co Surgical saw
GB1093032A (en) * 1965-01-21 1967-11-29 Scintilla Ag Improvements in jig-saw machines driven by an electric motor
US20050210687A1 (en) * 2004-03-15 2005-09-29 Gmca Pty Ltd Power tool bearing arrangement
EP1625909A1 (fr) * 1997-05-28 2006-02-15 maRoc GmbH Outil de coupe

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87205593U (zh) * 1987-04-07 1988-01-27 哈尔滨船舶工程学院 手提式电动线锯
CN2512549Y (zh) * 2001-12-18 2002-09-25 南方汇通股份有限公司 上摆式弹簧端面磨削机

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044171A (en) * 1961-07-17 1962-07-17 Howe Sound Co Surgical saw
GB1093032A (en) * 1965-01-21 1967-11-29 Scintilla Ag Improvements in jig-saw machines driven by an electric motor
EP1625909A1 (fr) * 1997-05-28 2006-02-15 maRoc GmbH Outil de coupe
US20050210687A1 (en) * 2004-03-15 2005-09-29 Gmca Pty Ltd Power tool bearing arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9522432B2 (en) 2012-06-01 2016-12-20 Herbert W. Staub Cradle cutter

Also Published As

Publication number Publication date
EP2024150B1 (fr) 2010-07-28
CN101443166B (zh) 2012-06-20
DE502007004574D1 (de) 2010-09-09
CN101443166A (zh) 2009-05-27
DE102006022804A1 (de) 2007-11-22
EP2024150A1 (fr) 2009-02-18

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