EP2024150B1 - 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
EP2024150B1
EP2024150B1 EP07727439A EP07727439A EP2024150B1 EP 2024150 B1 EP2024150 B1 EP 2024150B1 EP 07727439 A EP07727439 A EP 07727439A EP 07727439 A EP07727439 A EP 07727439A EP 2024150 B1 EP2024150 B1 EP 2024150B1
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EP
European Patent Office
Prior art keywords
tool
power tool
portable power
tool according
movement
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.)
Active
Application number
EP07727439A
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German (de)
English (en)
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EP2024150A1 (fr
Inventor
Steffen Wuensch
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
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Robert Bosch GmbH
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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 movement 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.
  • Hand tool machines of the type mentioned are also already known, which are also pendulum jigsaws.
  • the pivot axis is located beyond a received in a tool holder end face of a sawing tool in the oscillating tool holder, so that the oscillating together with the tool holder sawing tool performs a pendulum motion about the pivot axis.
  • the deflection of the tool is always greatest at its free end remote from the tool holder.
  • 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 they are relatively low not only to cut workpieces, but also to produce joints and recesses in the workpieces, and that they can be equipped not only with a sawing tool but also with different cutting tools and grinding and scraping tools, so that the hand tool to carry out a variety of different work and therefore has a great versatility.
  • the pivot axis between two angularly 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.
  • the tool oscillates during its oscillating movement about the pivot axis which moves along the path of motion, preferably at a significant distance from a machining edge, for example a sawtooth or knife edge, or a machining surface, for example a grinding surface ,
  • the tool is arranged and aligned in this generally parallel.
  • a first end of the push rod is pivotally guided about the pivot axis along the movement path, while the opposite second end of the push rod is articulated eccentrically on a drive crank rotationally 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 aligned 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 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.
  • hand tool 2 is used for material processing by sawing, grinding or scraping and emergency repairs.
  • the hand tool 2 is in Fig. 1 shown in the form of a equipped with a cranked sawing tool 4 off-grid battery device, but may 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, a arranged at one end of the housing 6 removable battery pack 8, arranged at the other end of the housing 6 processing head 10 with a laterally arranged tool holder 12 for exchangeable attachment of 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 holder 12 thrust crank 14, the in Fig. 2 is shown schematically 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 the path of movement of an oscillating movement of a workpiece engaging in a sawtooth cutting edge 32 of Fig. 1 Sawing tool 4 or a corresponding machining edge or machining surface of another tool, for example, a grinding surface or grinding edge of a grinding tool is shown, and also their pendulum motion and their speed of movement determined.
  • the guide slot 26 is formed as a linear guide, in which a sliding block 34 in a to a longitudinal axis 36 (FIG. Fig. 1 ) of the machine tool 2 parallel axis 44 is longitudinally displaceable movable, 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 in Fig. 1 shown.
  • 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 L1 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.
  • this angle ⁇ 90 °, as well as the enclosed by the two lever arms 22, 24 angle ⁇ , but the two angles ⁇ , ⁇ can assume other values.
  • 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 balance portion 42 may either be part of the tool 4, as in FIG Fig. 1 represented, or alternatively at least partially by a tool on the support 12 mounted mass balance element (not shown) are formed, for example, in the manufacture of the lever 20 integrally formed as a die-cast part on the lever arm 22, that it is beyond the pivot axis 40. In this case, however, 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 detach the tool 4, which is detachably fastened to the tool carrier 12, in an oscillating movement parallel to the longitudinal axis 36 of the machine tool 2 (double arrow A in FIG Fig. 1 ) and to offset this movement a pendulum or pivoting movement about the pivot axis 40 (double arrow B in Fig. 1 ) to superimpose.
  • 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 in Fig. 1 shown, or even may be concave, the latter, for example, in a sawing tool for cutting through pipes or round rods.
  • 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 as well as the Figures 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.
  • the FIGS. 3a and FIGS. 4b and 4c 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 with cut free cut in milled or ground design, as in Fig. 3b shown, universally applicable, since 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
  • teeth 48, 50 with a positive rake angle can be used for a high sawing progress, for example when sawing wood or plastic, as in FIG Fig. 4a shown when these teeth 48 and 50 are effective in both cutting directions.
  • FIG. 8a the trajectories of each one point in the middle and at the two opposite ends of the shege leopardschneide 32 for a revolution of the drive crank 16 in eight individual substeps are shown, wherein like numerals indicate the position of the three points at the same time points. Combining these points with each other results in their trajectories.
  • FIGS. 12 to 17 In addition to the trajectories of three points in the middle and at the two opposite ends of the sawtooth cutting edge 32, trajectories of further points in the right part of the sawtooth cutting edge 32 are shown. Fig. 8b and Fig. 10a only show trajectories of points in the right part of the sawtooth cutting edge 32.

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

Claims (14)

  1. Machine-outil à main comprenant un moteur d'entraînement et un outil (4) entraîné par le moteur d'entraînement, qui effectue au cours du fonctionnement du moteur d'entraînement un mouvement d'oscillation, auquel s'ajoute un mouvement pendulaire, l'outil (4) effectuant un mouvement pendulaire autour d'un axe de pivotement (40), qui va et vient le long d'une piste de déplacement (44), caractérisée en ce que l'axe de pivotement (40) est disposé entre deux bras de levier (22, 24) disposés suivant un certain angle l'un par rapport à l'autre, l'un des bras de levier (22) portant l'outil (4) et l'autre bras de levier (24) formant une tige poussoir d'un mécanisme de bielle-manivelle.
  2. Machine-outil à main selon la revendication 1, caractérisée en ce que la piste de déplacement (44) est rectiligne et est orientée essentiellement parallèlement à une arête d'usinage (32) ou à une surface d'usinage de l'outil (4).
  3. Machine-outil à main selon la revendication 1 ou 2, caractérisée en ce que l'axe de pivotement (40) présente un espace latéral considérable d'une arête d'usinage (32) ou d'une surface d'usinage de l'outil (4).
  4. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une extrémité de la tige poussoir (24) est guidée de manière à pivoter autour de l'axe de pivotement (40) le long de la piste de déplacement (44).
  5. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une extrémité de la tige poussoir (24) est articulée de manière excentrique à une manivelle d'entraînement (18) entraînée en rotation par le moteur d'entraînement, de sorte qu'elle décrive une piste circulaire pendant le fonctionnement du moteur d'entraînement.
  6. Machine-outil à main selon la revendication 5, caractérisée en ce que le centre de la piste circulaire se trouve sur la piste de déplacement rectiligne (44).
  7. Machine-outil à main selon la revendication 5, caractérisée en ce que le centre de la piste circulaire est décalé latéralement par rapport à la piste de déplacement rectiligne (44).
  8. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée en ce que l'outil (4) peut être fixé de manière remplaçable sur le bras de levier (22) servant de porte-outil (12).
  9. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée en ce que le levier (20) ou l'outil (4) présentent des dispositifs d'équilibrage de masse pour supprimer les vibrations.
  10. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée en ce que la machine-outil (2) peut être dotée au choix d'un outil de sciage, découpage, meulage ou raclage.
  11. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée en ce que l'outil (4) présente une arête d'usinage (32) étirée en longueur, qui après la fixation à la machine-outil (2), est orientée généralement parallèlement à un axe longitudinal (36) de la machine-outil (2) et qui est disposée à distance latérale de celle-ci.
  12. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée en ce que l'outil (4) est coudé.
  13. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée en ce que l'outil (4) présente une arête d'usinage de courbure convexe ou concave (32).
  14. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée par un logement d'outil qui peut être fixé à la machine-outil (2) de manière tournée de 180° dans une orientation différente.
EP07727439A 2006-05-16 2007-03-28 Machine-outil à main avec outil entraîné en oscillation et en mouvement pendulaire Active EP2024150B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610022804 DE102006022804A1 (de) 2006-05-16 2006-05-16 Handwerkzeugmaschine mit oszillierend und pendelnd angetriebenem Werkzeug
PCT/EP2007/052967 WO2007131831A1 (fr) 2006-05-16 2007-03-28 Machine-outil à main avec outil entraîné en oscillation et en mouvement pendulaire

Publications (2)

Publication Number Publication Date
EP2024150A1 EP2024150A1 (fr) 2009-02-18
EP2024150B1 true EP2024150B1 (fr) 2010-07-28

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ID=38185390

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07727439A Active EP2024150B1 (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)

Families Citing this family (7)

* 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
US9522432B2 (en) 2012-06-01 2016-12-20 Herbert W. Staub Cradle cutter
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

Family Cites Families (6)

* 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
DE1279923B (de) * 1965-01-21 1968-10-10 Scintilla Ag Einrichtung zur Erzeugung einer zusaetzlichen Vorschubbewegung fuer das Saegeblatt einer Stichsaegemaschine
CN87205593U (zh) * 1987-04-07 1988-01-27 哈尔滨船舶工程学院 手提式电动线锯
DE29825263U1 (de) * 1997-05-28 2007-10-25 Maroc Gmbh Schneidwerkzeug
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
GB0405729D0 (en) * 2004-03-15 2004-04-21 Gmca Pty Ltd Power tool bearing arrangement

Also Published As

Publication number Publication date
DE102006022804A1 (de) 2007-11-22
EP2024150A1 (fr) 2009-02-18
CN101443166A (zh) 2009-05-27
DE502007004574D1 (de) 2010-09-09
WO2007131831A1 (fr) 2007-11-22
CN101443166B (zh) 2012-06-20

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