EP2686148B1 - Werkzeugspannvorrichtung - Google Patents

Werkzeugspannvorrichtung Download PDF

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Publication number
EP2686148B1
EP2686148B1 EP12703060.9A EP12703060A EP2686148B1 EP 2686148 B1 EP2686148 B1 EP 2686148B1 EP 12703060 A EP12703060 A EP 12703060A EP 2686148 B1 EP2686148 B1 EP 2686148B1
Authority
EP
European Patent Office
Prior art keywords
clamping
tool
unit
head
power tool
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
EP12703060.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2686148A1 (de
Inventor
Marcel Fankhauser
Bruno Luescher
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 EP2686148A1 publication Critical patent/EP2686148A1/de
Application granted granted Critical
Publication of EP2686148B1 publication Critical patent/EP2686148B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/30—Details; Component parts; Accessories for mounting or securing saw blades or saw spindles
    • B27B5/32—Devices for securing circular saw blades to the saw spindle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/33—Member applies axial force component

Definitions

  • Tool clamping devices are already known which comprise a clamping unit.
  • the clamping unit here has a clamping element for clamping a machining tool in an axial direction and a clamping head arranged on the clamping element, which is provided for clamping the machining tool at a free end of the clamping unit.
  • US5468247 discloses a portable machine tool according to the preamble of claim 1.
  • the invention relates to a portable machine tool according to claim 1.
  • the invention is based on a tool clamping device, in particular an oscillating tool clamping device, with a clamping unit which has at least one clamping element for clamping a machining tool in an axial direction and at least one clamping head arranged on the clamping element and which is provided for clamping the machining tool at a free end of the clamping unit .
  • the clamping unit have a guide unit, which is intended to guide at least one movement of the machining tool along at least one direction of movement in at least one operating state, which deviates substantially from the axial direction.
  • a “clamping unit” is to be understood here in particular to mean a unit that secures a machining tool by means of a form fit and / or by means of a force fit along the axial direction.
  • the clamping unit has an operating unit.
  • control unit is intended here in particular to mean a unit define which has at least one control element which can be operated directly by an operator and which is intended to influence a process and / or a state of a unit coupled to the control unit by actuation and / or by entering parameters, and / or change.
  • a “processing tool” is to be understood in particular as a sheet-like tool which is intended in particular for machining, preferably sawing, a workpiece.
  • the term “axial direction” is intended here to define in particular a direction which preferably runs at least substantially parallel to a pivot axis and / or axis of rotation of a drive shaft of a portable machine tool provided for driving the machining tool.
  • "Essentially parallel” is to be understood here to mean in particular an orientation of a direction relative to a reference direction, in particular in a plane, the direction relative to the reference direction being a deviation in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °.
  • a “tensioning element” is to be understood in particular as an element which is provided for transmitting a tensioning force, preferably generated by a spring unit.
  • the clamping element is preferably at least partially arranged in a hollow shaft and in particular is mounted on bearing means which are arranged on the hollow shaft.
  • a “clamping head” is to be understood here in particular to mean a component which has at least one clamping surface which, in order to clamp the machining tool in the axial direction, bears against at least one partial surface of the machining tool and applies a clamping force along the axial direction to the machining tool and in particular presses it against a tool holder .
  • a “tool holder” is to be understood in particular to mean a component which is intended to hold a machining tool in a holding region and to establish a positive and / or non-positive connection with the machining tool in the circumferential direction.
  • the tool holder is positively and / or cohesively connected to the drive shaft.
  • a “receiving area” is to be understood in particular as a near area of the tool holder which is completely filled by a machining tool clamped in the clamping unit.
  • a “free end” of the clamping unit is to be understood in particular as an area of the clamping unit that is freely accessible to an operator, preferably using no tools and in particular removing housing parts can be.
  • a “guide unit” is to be understood in particular as a unit which is intended to require an assembly movement which differs from a purely axial assembly movement, a movement around and / or along the axial direction, and in particular differs from a guide unit which allows to move an unassembled machining tool into the receiving area of the tool holder by a single translational movement in a direction of movement that is at least substantially parallel to the axial direction.
  • the guide unit in particular after an element of the guide unit has been adjusted, can have sufficient play to tilt the machining tool with respect to a plane whose normal vector is oriented at least substantially parallel to the axial direction in order to enable an angle of up to 50 °.
  • a “substantial deviation" of a direction of movement from the axial direction is to be understood in particular to mean that the direction of movement and the axial direction enclose an angle which is greater than 30 °, advantageously greater than 60 ° and preferably greater than 85 °.
  • the clamping head is advantageously formed in one piece with the clamping element.
  • one-piece is to be understood in particular to be understood to be at least integrally bonded, for example by means of a welding process, an adhesive process, a gating process and / or another process which seems sensible to a person skilled in the art, and / or advantageously to be formed in one piece, for example by a Manufactured from one casting and / or by manufacturing in a one- or multi-component injection molding process and advantageously from a single blank.
  • the clamping head is connected to the clamping element by means of a positive and / or non-positive connection, in particular non-rotatably.
  • the guide unit has a receiving area which, when viewed in a clamping direction, is at least partially arranged behind the clamping head of the clamping element.
  • a “clamping direction” is to be understood in particular as a direction into which the clamping head exerts a force on the processing tool in an operating state with the processing tool clamped.
  • An axial overlap with a clamping surface of the clamping head can advantageously be achieved by the movement of the machining tool.
  • the term “axial overlap” is intended here to define, in particular, an overlap, in particular of partial areas, of at least two components along the axial direction, in particular a straight line intersecting the two components along the axial direction.
  • the clamping surface of the clamping head covers at least a portion of the machining tool along the axial direction at least in an operating state in which the machining tool is clamped to a tool holder by means of the clamping head.
  • an axial overlap is maintained in the event of a change in position, preferably by rotation about an axis of a shaft of the machining tool.
  • tool-free clamping and / or loosening of the processing tool can be achieved.
  • the clamping head be arranged eccentrically to a longitudinal axis of the clamping element.
  • a clamping head should in particular be understood to mean a smallest part of the clamping element, which is delimited by a plane whose normal vector is arranged essentially parallel to the axial direction and which, seen from the free end, lies behind the clamping surface contains at least the clamping surface.
  • an element is arranged “eccentrically” to an axis should in particular be understood to mean that a center of gravity, preferably a geometric center of gravity, of the element is further away from the axis than at least 3%, advantageously at least 8% and preferably at least 20% a maximum expansion of the element.
  • a “longitudinal axis” of the tensioning element is understood to mean an axis of the tensioning element which, when the tensioning element is in an assembled state, lies essentially parallel to the axial direction. An axial overlap of the clamping head with the machining tool can easily be achieved.
  • the clamping head has a chamfer on at least one side facing away from a clamping surface.
  • the smallest extension of the chamfer is greater than 1 mm and advantageously greater than 2 mm.
  • the chamfer advantageously has an angle to the longitudinal axis of the tensioning element which deviates less than 40 °, in particular less than 20 ° and preferably less than 5 ° from an angle of 45 °. In particular, simple assembly can be achieved.
  • the clamping head has at least one clamping surface which is arranged asymmetrically, preferably eccentrically, with respect to a longitudinal axis of the clamping element. An axial overlap of the clamping head with the machining tool can easily be achieved.
  • the clamping unit have a clamping section, the length of which is between 1.5 mm and 3 mm.
  • the clamping head is moved around the clamping distance during an entire assembly and clamping process of the machining tool.
  • the invention is based on a portable machine tool, in particular a hand-held machine tool with an oscillatingly drivable spindle, with a tool clamping device according to the invention.
  • a “portable machine tool” is to be understood here in particular to mean a machine tool, in particular a hand-held machine tool, which can be transported by an operator without a transport machine.
  • the portable machine tool in particular has a mass which is less than 40 kg, preferably less than 10 kg and particularly preferably less than 5 kg. A high level of operating comfort for an operator of the handheld power tool can advantageously be achieved.
  • Figure 1 shows a system consisting of an electrically operated portable machine tool 38 and a processing tool 16 designed as a saw blade.
  • the machine tool 38 has a tool clamping device 10 designed as an oscillating tool clamping device, which is provided for clamping the processing tool 16 in the machine tool 38.
  • the portable machine tool 38 includes a machine tool housing 42, an electric motor unit 44, a gear unit 46 and encloses an output unit 48 of the portable machine tool 38.
  • the machine tool housing 42 in this case comprises two housing half-shells 50, 52 which are detachably connected to one another along a plane running through an axial direction 18.
  • the machine tool housing 42 has two or more cup-shaped housing parts which can be detachably connected to one another.
  • the axial direction 18 runs along and / or parallel to an axis of rotation 54 of a hollow shaft 56, formed as a spindle 40, of the output unit 48 ( Figure 3 ).
  • the hollow shaft 56 is provided for oscillatingly driving a machining tool 16 in an assembled state.
  • An oscillating drive of the machining tool 16 takes place in a manner already known to a person skilled in the art, such as, for example, by means of a pin of the gear unit 46, which is arranged eccentrically on a drive shaft of the electric motor unit 44 (not shown here in more detail) and which is actuated by means of a rocker arm and an oscillating sleeve (not shown here) of the gear unit 46 drives the hollow shaft 56 during operation of the portable machine tool 38.
  • the hollow shaft 56 designed as a spindle 40 can thus be driven in an oscillating manner.
  • the machining tool 16 can be fastened to a tool holder 58 of the output unit 48 for machining workpieces.
  • the tool holder 58 is formed in one piece with the hollow shaft 56.
  • a pivoting movement of the hollow shaft 56 can be transmitted to the tool holder 58.
  • the tool holder 58 has twelve latching cams 66 arranged uniformly along a circle, which are provided with twelve driver recesses 60 formed on the machining tool 16 for a positive connection ( Figure 2 ).
  • the tool clamping device comprises a clamping unit 12.
  • the clamping unit has a clamping element 14 for clamping a machining tool 16 in an axial direction 18 and a clamping head 20 arranged on the clamping element 14, which is provided for clamping the machining tool 16 at a free end 30 of the clamping unit 12.
  • the clamping element 14 is partially arranged in the hollow shaft 56.
  • the clamping element 14 is mounted on a bearing element 24 of the hollow shaft 56.
  • the clamping unit 12 furthermore has a guide unit 22, which is provided in an operating state that differs from an operating state with the machining tool 16 clamped, a movement of the machining tool 16 along a To lead direction 34, which differs significantly from the axial direction 18.
  • the guide unit 22 is formed by the clamping element 14, the clamping head 20 arranged on the clamping element 14 and the tool holder 58.
  • the clamping head 20 is formed in one piece with the clamping element 14.
  • the guide unit 22 has a receiving area 59 which, when viewed in a clamping direction 36, is arranged at least partially behind the clamping head 20 of the clamping element 14.
  • the clamping head 20 is arranged eccentrically to a longitudinal axis 28 of the clamping element 14.
  • the clamping head 20 has a clamping surface 72 which is arranged asymmetrically with respect to the longitudinal axis 28 of the clamping element 14.
  • the clamping head 20 has a chamfer 26 on a side facing away from the clamping surface 72.
  • the clamping unit 12 has a clamping section 32, the length of which is 2 mm.
  • Figure 2 shows the tool clamping device 10 in a view in the clamping direction 32.
  • the machining tool 16 is connected to the tool holder 58 in the circumferential direction 62 via the latching cams 66 and the driving recesses 60.
  • a clamping head 20 arranged eccentrically to the longitudinal axis 28 of the clamping element 14 on the clamping element 14 has a clamping surface 72.
  • the clamping surface 72 is arranged eccentrically with respect to the longitudinal axis 28 of the clamping element 12.
  • the clamping head 20 has a chamfer 26 which facilitates the attachment of the machining tool 16 having a plug-in hole 64.
  • the chamfer 26 has an angle of inclination of 45 ° with respect to the longitudinal axis 28 of the clamping element 14 and a width of 2 mm.
  • the insertion hole 64 is arranged centrally between the driving recesses 60 of the machining tool 16.
  • the clamping head 20 is arranged on the longitudinal axis 28 of the clamping element 14 and is mushroom-shaped and a processing tool 16 has a plug hole 64 which is arranged eccentrically to a center point between the driving recesses 60.
  • FIG. 3 shows a schematic detail of the output unit 48 and the tool clamping device 10 in an operating state with clamped Machining tool 16.
  • the clamping unit 12 has a spring unit 76.
  • the spring unit 76 uses a prestressed compression coil spring 78 to generate a clamping force which is transmitted to the clamping head 20 via the clamping element 14.
  • the clamping head 20 presses the machining tool 16 against the tool holder 58 in the clamping direction 36 with this clamping force.
  • the machining tool 16 is arranged in a holding region 59.
  • the latching cams 66 of the tool holder 58 engage in the driving recesses 60 of the machining tool 16.
  • the receiving region 59 is arranged behind the clamping head 20, partially viewed in the clamping direction 36.
  • a clamping surface 72 of the clamping head 20 is arranged on the rear side of the clamping head 20 when viewed in the clamping direction 36.
  • the clamping force is generated via a thread by tightening a nut and / or a screw.
  • cup springs are used instead of the compression coil spring 78.
  • the clamping unit 12 has an operating unit 88 ( Figure 1 ).
  • the operating unit 88 comprises an operating lever 90 which is rotatably mounted about the axis of rotation 54 of the hollow shaft 56.
  • the control unit 88 has a mechanism (not shown in more detail here) which is provided to convert a rotary movement of the control lever 90 about the axis of rotation 54 into a translatory movement of the tensioning element 14 along the axial direction 18.
  • the mechanism can be formed by a gear, a control cam or other mechanisms, already known to a person skilled in the art, for converting a rotary movement into a translatory movement.
  • the operating unit 88 is decoupled from an oscillating movement of the clamping element 14 during operation of the portable machine tool 38 in a manner already known to the person skilled in the art in an operating state with a firmly clamped machining tool. In an operating state that differs from an operating state with a clamped machining tool, the operating unit 88 is coupled to the clamping element 14 and / or the clamping head 20 in a manner already known to the person skilled in the art in order to release a clamping force.
  • Figure 4 shows the detail Figure 3 in an operating state that differs from a state with a clamping machining tool 16.
  • the operating lever 90 was actuated to achieve this operating state.
  • the tensioning element 14 was moved by the operating unit 88 against the tensioning direction 36 by a tensioning distance 32.
  • the length of the span 32 is 2 mm.
  • the processing tool 16 is released from the receiving area.
  • the clamping head 20 of the clamping element 14 and the tool holder 58 form a guide unit 22, which guides a movement of the machining tool 16 in the direction of movement 34.
  • the direction of movement 34 is essentially perpendicular to the axis of rotation 54 of the hollow shaft 56 and thus to the axial direction 18.
  • the processing tool 16 is in a position in which the plug hole 64 in Guided axially over the clamping head 20 and thus the machining tool 16 can be released from the portable machine tool 38.
  • Both the clamping element 14 and the clamping head 20 remain connected to the tool clamping device 10 during a disassembly or assembly of the machining tool 16.
  • the chamfer 26 supports the insertion of the plug-in hole 64 over the clamping head 20. The entire assembly or disassembly of the machining tool 16 is carried out without tools.
EP12703060.9A 2011-03-18 2012-02-02 Werkzeugspannvorrichtung Active EP2686148B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011005821A DE102011005821A1 (de) 2011-03-18 2011-03-18 Werkzeugspannvorrichtung
PCT/EP2012/051725 WO2012126661A1 (de) 2011-03-18 2012-02-02 Werkzeugspannvorrichtung

Publications (2)

Publication Number Publication Date
EP2686148A1 EP2686148A1 (de) 2014-01-22
EP2686148B1 true EP2686148B1 (de) 2020-04-08

Family

ID=45569620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12703060.9A Active EP2686148B1 (de) 2011-03-18 2012-02-02 Werkzeugspannvorrichtung

Country Status (6)

Country Link
US (1) US9346183B2 (zh)
EP (1) EP2686148B1 (zh)
CN (1) CN103442861B (zh)
DE (1) DE102011005821A1 (zh)
RU (1) RU2603026C2 (zh)
WO (1) WO2012126661A1 (zh)

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US9073195B2 (en) 2010-04-29 2015-07-07 Black & Decker Inc. Universal accessory for oscillating power tool
US8925931B2 (en) 2010-04-29 2015-01-06 Black & Decker Inc. Oscillating tool
DE102012004458A1 (de) * 2012-03-08 2013-09-12 Robert Bosch Gmbh Werkzeugaufnahme
USD832666S1 (en) 2012-07-16 2018-11-06 Black & Decker Inc. Oscillating saw blade
DE102015114028A1 (de) * 2015-08-24 2017-03-02 Wolfcraft Gmbh Adaptersystem zur Befestigung eines Werkzeuges an einem oszillierend antreibbaren Antriebsabschnitt
EP3308887B1 (de) * 2016-07-05 2019-06-19 Narr Beteiligungs GmbH Spanneinheit
JP6802907B2 (ja) * 2016-08-22 2020-12-23 ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ 持運び可能な工作機械のためのクイッククランプ装置、および、持運び可能な工作機械
USD814900S1 (en) 2017-01-16 2018-04-10 Black & Decker Inc. Blade for oscillating power tools
US10265778B2 (en) 2017-01-16 2019-04-23 Black & Decker Inc. Accessories for oscillating power tools
DE102017214118A1 (de) * 2017-08-11 2019-02-14 Robert Bosch Gmbh Schnellspannvorrichtung für eine, insbesondere zumindest eine rotierend antreibbare Abtriebswelle aufweisende, tragbare Werkzeugmaschine, insbesondere Winkelschleifmaschine
USD862185S1 (en) * 2019-06-19 2019-10-08 Shenzhen Yihong Technology Co., Ltd Tool blade
US11919100B2 (en) 2020-02-25 2024-03-05 The Black & Decker Corporation Accessories for oscillating power tools
GB2611467B (en) 2020-05-12 2023-10-04 Mako Surgical Corp Clamp guard
US20220184721A1 (en) 2020-12-11 2022-06-16 Black & Decker Inc. Accessories for oscillating power tools
US20220234124A1 (en) 2021-01-22 2022-07-28 Black & Decker Inc. Accessories for oscillating power tools
EP4245458A1 (en) 2022-03-14 2023-09-20 Black & Decker, Inc. Accessories for oscillating power tools

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Also Published As

Publication number Publication date
US9346183B2 (en) 2016-05-24
RU2013146368A (ru) 2015-11-27
CN103442861B (zh) 2016-11-09
WO2012126661A1 (de) 2012-09-27
RU2603026C2 (ru) 2016-11-20
DE102011005821A1 (de) 2012-09-20
EP2686148A1 (de) 2014-01-22
CN103442861A (zh) 2013-12-11
US20140070500A1 (en) 2014-03-13

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