EP2464481A1 - Dispositif de scie, en particulier dispositif de scie à guichet - Google Patents

Dispositif de scie, en particulier dispositif de scie à guichet

Info

Publication number
EP2464481A1
EP2464481A1 EP10732904A EP10732904A EP2464481A1 EP 2464481 A1 EP2464481 A1 EP 2464481A1 EP 10732904 A EP10732904 A EP 10732904A EP 10732904 A EP10732904 A EP 10732904A EP 2464481 A1 EP2464481 A1 EP 2464481A1
Authority
EP
European Patent Office
Prior art keywords
unit
axis
lifting
holding
sawing device
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Withdrawn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
EP10732904A
Other languages
German (de)
English (en)
Inventor
Thilo Koeder
Joachim Platzer
Ulli Hoffmann
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 EP2464481A1 publication Critical patent/EP2464481A1/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Withdrawn legal-status Critical Current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
    • 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

  • a jigsaw device with a lifting unit which is mounted manually movable about an axis extending in the direction of a lifting movement of the lifting unit.
  • a sawing device in particular a Stichsägevoriques, with a lifting unit which is movably mounted to set a sawing about at least one axis, and with a control unit which is provided, the lifting unit in at least one operating mode about the at least one axis at least partially automated move, as well as with a holding unit, which is intended to counteract in at least one operating mode by means of a holding force of a movement of the lifting unit about the axis proposed.
  • a "lifting unit” is to be understood as meaning in particular a unit which transmits a lifting movement to a saw blade.
  • “Setting a sawing direction” is to be understood to mean that a sawing direction can be changed starting from a basic sawing direction, so that in particular Saw cut along a direction changing line, in particular score line, can be performed.
  • the axis about which the lifting unit is movably mounted preferably runs at least substantially in the direction of the lifting movement of the lifting unit.
  • “at least substantially” should be understood in particular to mean that the axis to an axis of movement along which the lifting unit is movable or executes a lifting movement during operation, an angle of less than 60 °, preferably less than 45 °, and more preferably less than 10 °.
  • a "control unit” is to be understood in particular as meaning a unit by means of which a characteristic variable for a necessary alignment of the lifting unit can be detected and / or the alignment can be adapted
  • the control unit may comprise a drive unit.
  • a "drive unit” should be understood to mean, in particular, a unit which has an actuator for generating a drive force, such as an electric motor, a piezoactuator, etc., and / or a transmission for transmitting a drive force be understood, designed and / or programmed understood.
  • the control unit also comprises a computing unit, a memory unit and an operating program stored therein, which preferably comprises a control algorithm.
  • a "holding unit” is to be understood as meaning in particular a unit which is purposefully intended to prevent an undesired movement of the lifting unit, wherein the holding unit is preferably designed in such a way that a holding moment about the axis with a value of at least 0.1 Nm, preferably at least 1 Nm and particularly preferably at least 5 Nm can be achieved by means of a corresponding embodiment.
  • ⁇ br/> ⁇ br/> Particularly advantageous use can be achieved with an at least partially deactivated control unit and undesired rotation can occur a saw blade are prevented when a counter-torque on the saw blade exceeds a torque of an actuator unit of the control unit on the saw blade.
  • control unit is provided to set the lifting unit in at least one specific position upon deactivation of an at least semi-automatic adjustment of the sawing direction, such as preferably at least into a neutral position which is provided for straight-ahead sawing.
  • the holding unit is formed at least partially in one piece with a further functional unit of the sawing device, additional components, weight,
  • an “another Functional unit” is to be understood in this context, in particular a unit having a separate function of the holding unit, such as in particular a storage unit, which is provided for example for storage of the lifting unit and / or other, the person skilled in the appear appropriate units.
  • the holding unit is at least partially formed integrally with the control unit, whereby a structurally simple integration of the holding unit can be achieved, in particular in an at least partially integral formation with a drive unit of the control unit, i. in particular with an actuator unit and / or particularly advantageously with a gear unit of the control unit.
  • the holding unit is at least partially formed by a self-locking unit.
  • a "self-locking unit” should be understood to mean, in particular, a unit which has different resistance forces in opposite directions of movement and / or directions of force flow and can thus automatically generate a holding force in the direction with the higher resistance, the higher resistance being advantageously achieved by a clamping operation, in particular
  • the oblique surface and the corresponding surface are preferably formed in such a way that an increasing normal load and thus an increasing adhesive friction result from an increasing load Force flow direction from an insert tool to a drive unit designed to be greater than a resistance force in an opposite direction of force flow from the drive unit in the direction of the insert tool, before
  • the self-locking unit is preferably designed in such a way that in the direction of the higher resistance non-destructive movement is not possible.
  • the self-locking unit can be formed by various units that appear appropriate to those skilled in the art, such as freewheels, etc., but particularly advantageously by a self-locking gear unit, whereby the self-locking unit can be realized particularly simple design, especially if the holding unit at least partially is formed by a self-locking worm gear.
  • highly inhibitory gear such as multi-stage spur gear, etc., conceivable.
  • sliding wedge or stress wave transmission are also particularly advantageous.
  • Corresponding transmissions are characterized in particular by a so-called wave generator, a so-called flexspline and a so-called circular spline.
  • the wave generator is in particular at least partially formed by an elliptical steel disk with a bearing, in particular with a shrunk-on rolling bearing, and a thin deformable raceway.
  • the flexspline is formed in particular at least partially by a deformable cylindrical bushing, in particular a steel bushing, with external toothing.
  • the circular spline is in particular at least partially formed by a rigid cylindrical outer ring with an internal toothing. In this case, preferably has the outer teeth of the Flexspline fewer teeth than the internal teeth of the circular spline.
  • the operation proceeds in particular in such a way that the wave generator, as a driven part, deforms the flexspline via the bearing, which is in engagement with the internally toothed, fixed circular spline in opposite areas of a large ellipse axis. Turning the Wave Generator shifts the large ellipse axis and thus the meshing area. Since the Flexspline has fewer teeth than the Circular Spline, after half a turn of the Wave Generator, a relative movement between the Flexspline and the Circular Spline occurs by half a tooth difference, for example, a tooth difference of two teeth around a tooth, and after one complete revolution around the tooth difference, for example, in a tooth difference of two teeth by two teeth. When the Circular Spline is fixed, the Flexspline rotates as an output element opposite to the drive.
  • the invention is suitable for various sawing devices that appear suitable to the person skilled in the art, but are particularly advantageous for hand-held sawing devices which are intended to be used in a hand-held saw.
  • a "hand saw” should be understood to mean a saw. that is intended to be carried by an operator and in particular to be moved during a machining of a workpiece.
  • the hand saw should be understood to mean a saw. that is intended to be carried by an operator and in particular to be moved during a machining of a workpiece.
  • Handhubsäge in particular at least one carrying handle and in particular a weight below 30 kg, preferably below 20 kg and more preferably below 15 kg.
  • FIG. 1 shows a schematic representation of a manual lifting saw in a side view.
  • the hand saw is designed as a jigsaw and has a housing 22 with a integrally formed with the housing 22 handle 24.
  • the hand saw has a Stichsägevorraum with a lifting unit formed by a lifting rod
  • the axis 12 extends in the longitudinal direction of the lifting rod and a Hubtownsachse 40 of the lifting rod and is arranged coaxially with the lifting rod and a jigsaw blade 26.
  • the jigsaw blade 26 is coupled to the lifting rod via a tool holder, not shown in more detail.
  • the jigsaw device comprises a control unit 14 which is provided for automatically moving the lifting unit 10 about the axis 12 in at least one operating mode.
  • the control unit 14 has a drive unit with a gear unit 18 formed by a worm gear and an electric actuator unit 28.
  • the actuator 28 is formed by a separate electric motor.
  • an actuator unit of the control unit 14 is formed integrally with an actuator unit 30 of the hand stroke saw, which is intended to move the lifting unit 10 back and forth in the longitudinal direction.
  • the transmission unit 18 with a Gear unit 32 may be coupled, which connects the actuator unit 30 in terms of drive technology with the lifting unit 10.
  • a switching unit 34 may be provided with a switchable coupling unit.
  • the control unit 14 comprises a sensor unit 20 formed by a contrast detection unit, which is provided for detecting characteristic variables of a processing surface, and an evaluation unit for evaluating the acquired characteristics.
  • the jigsaw device comprises a holding unit 16, which is provided to counteract by means of a holding force a movement of the lifting unit 10 about the axis 12.
  • the holding unit 16 is formed integrally with the control unit 14, in one piece with the worm gear designed, self-locking gear unit 18 of the control unit 14. Due to the self-locking property of the gear unit 18 in a force flow direction 36 of the actuator 28 to the lifting unit 10, the lifting unit 10 with a small force or with a small torque from the actuator unit 28 are pivoted about the axis 12, while in a power flow direction 38 from
  • Embodiment an undesirable movement, initiated by a force or by a torque starting from the jigsaw blade 26 in the direction of force flow 38 via the lifting unit 10 to the transmission unit 18, are advantageously prevented.
  • control unit 14 sets the lifting unit 10 and thus the jigsaw blade 26 in its
  • Neutral position and the Handhubsäge can advantageously manually detected with the axis 12 lifting unit 10 and thus with the axis 12 detected
  • Jigsaw blade 26 are operated, without energization of the actuator 28 of the control unit 14th

Landscapes

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

Abstract

L'invention concerne un dispositif de scie, en particulier un dispositif de scie à guichet, doté d'une unité de levage (10), qui est logée de façon mobile autour d'au moins un axe (12) pour le réglage d'une direction de scie, et d'une unité de commande (14), qui est prévue pour déplacer l'unité de levage (10), de façon au moins semi-automatisée, dans au moins un mode de service autour du au moins un axe (12), et d'une unité de retenue (16), qui est prévue pour s'opposer dans au moins un mode de service au moyen d'une force de retenue à un déplacement de l'unité de levage (10) autour de l'axe (12).
EP10732904A 2009-08-14 2010-07-05 Dispositif de scie, en particulier dispositif de scie à guichet Withdrawn EP2464481A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910028556 DE102009028556A1 (de) 2009-08-14 2009-08-14 Sägevorrichtung, insbesondere Stichsägevorrichtung
PCT/EP2010/059539 WO2011018277A1 (fr) 2009-08-14 2010-07-05 Dispositif de scie, en particulier dispositif de scie à guichet

Publications (1)

Publication Number Publication Date
EP2464481A1 true EP2464481A1 (fr) 2012-06-20

Family

ID=42830117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10732904A Withdrawn EP2464481A1 (fr) 2009-08-14 2010-07-05 Dispositif de scie, en particulier dispositif de scie à guichet

Country Status (4)

Country Link
EP (1) EP2464481A1 (fr)
CN (1) CN102470459A (fr)
DE (1) DE102009028556A1 (fr)
WO (1) WO2011018277A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5010652A (en) * 1990-03-19 1991-04-30 Miletich David J Optically guided power sabre saw
US7526867B2 (en) 2003-09-19 2009-05-05 Gmca Pty Limited Tool with clamping apparatus and an improved scrolling mechanism
CN1608774A (zh) * 2003-10-20 2005-04-27 Gmca有限公司 用于工具构件的夹具以及改进的卷曲机构
DE202004005478U1 (de) * 2004-04-02 2004-07-15 Atlas Copco Electric Tools Gmbh Stichsäge mit einem geführten Sägeblatt
DE102006052808A1 (de) * 2006-11-09 2008-05-15 Robert Bosch Gmbh Handhubsägemaschine
DE102008001775A1 (de) * 2008-05-14 2009-11-19 Robert Bosch Gmbh Werkzeugmaschine, insbesondere handgehaltene Werkzeugmaschine

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2011018277A1 *

Also Published As

Publication number Publication date
WO2011018277A1 (fr) 2011-02-17
CN102470459A (zh) 2012-05-23
DE102009028556A1 (de) 2011-02-17

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