EP2017036A1 - Outil manuel à moteur - Google Patents

Outil manuel à moteur Download PDF

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Publication number
EP2017036A1
EP2017036A1 EP08012511A EP08012511A EP2017036A1 EP 2017036 A1 EP2017036 A1 EP 2017036A1 EP 08012511 A EP08012511 A EP 08012511A EP 08012511 A EP08012511 A EP 08012511A EP 2017036 A1 EP2017036 A1 EP 2017036A1
Authority
EP
European Patent Office
Prior art keywords
clamping
fastening element
hand tool
collet
tool according
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.)
Granted
Application number
EP08012511A
Other languages
German (de)
English (en)
Other versions
EP2017036B1 (fr
Inventor
Jürgen Blickle
Uwe Frueh
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.)
C&E Fein GmbH and Co
Original Assignee
C&E Fein GmbH and Co
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 C&E Fein GmbH and Co filed Critical C&E Fein GmbH and Co
Publication of EP2017036A1 publication Critical patent/EP2017036A1/fr
Application granted granted Critical
Publication of EP2017036B1 publication Critical patent/EP2017036B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/022—Spindle-locking devices, e.g. for mounting or removing the tool
    • 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
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools

Definitions

  • the invention relates to a power-driven hand tool with a motor-driven drive spindle for driving a tool, wherein the tool is fixable to a holding portion of the drive spindle by means of a fastener, with a displacement device for displacement of the fastener between a release position in which the fastener is detachable from the drive spindle , and a clamping position, in which the fastening element is tensioned against the holding portion by a spring element, wherein the fastening element has an insertable into the drive spindle clamping shaft, which is axially fixed in the clamping position in the drive spindle for clamping the tool, and in the release position detachable is.
  • Such a power-driven hand tool is from the WO 2005/102605 A1 known.
  • a fastener is insertable through a mounting opening of the tool in the drive spindle and clamped therein to clamp the tool against the holding portion of the drive spindle and set positively.
  • clamping devices for clamping tools on power tools without the aid of an auxiliary tool are from the DE 41 22 320 A1 and from the EP 0 152 564 B1 known.
  • a hollow drive shaft is provided, a slidably mounted therein spindle having a displacement device and a clamping point, which is formed from a central fastening element or a flange which is clamped by means of the displacement device against the drive shaft.
  • a positive connection may be provided between the fastening element and the drive shaft to prevent loosening of the tool during braking operations.
  • clamping devices in question are designed exclusively for rotationally driven power tools. A transmission to oscillating powered power tools is not possible.
  • the invention has the object, a power tool of the type mentioned, the drive spindle to his Longitudinal axis oscillating drivable to specify, in which a safe voltage of the tool on the drive spindle is ensured without the aid of auxiliary tools and can be easily solved for tool change.
  • the clamping device should be suitable for receiving the highest possible loads, as they occur in oscillating driven tools.
  • a collet for clamping the tool is provided against the holding portion, which is stretched in the clamping position by the fastener against the holding portion and that the collet on its outer surface for positive reception of the tool is formed at its attachment opening, preferably formed polygonal.
  • a significantly increased clamping force over conventional clamping systems is achieved by the use of a collet for clamping the tool against the holding portion and by positive coupling of the collet with the tool. Furthermore, a secure torque transmission is ensured even with highly loaded, oscillating driven machines by the positive connection of the collet with the tool.
  • the fastener engages the collet in such a way that in the clamping position, a positive locking element of the collet is acted upon by the fastener against a positive locking counter-element of the drive spindle.
  • This measure has the advantage that the positive connection between the collet and drive spindle, which is always provided for reasons of handling with a certain play, is further intensified, so that a completely backlash-free positive connection is ensured in the clamping position.
  • the fastening element has a section with an inclined surface, the extension of which engages with a correspondingly adapted inner surface on the collet chuck.
  • the engaging in the collet portion of the fastener may be formed approximately conical.
  • a spring element is provided between the collet and the fastening element.
  • the collet is positively connected to the holding portion.
  • the collet is held on the clamping shank of the fastening element and with the fastening element connected to a detachable in the release position of the drive shaft unit.
  • form-locking elements are provided on the fastening element, which cooperate with movable clamping pieces for the positive fixing of the fastening element in the clamping position.
  • radially movable clamping pieces are provided.
  • a sleeve is received in the drive spindle, on which the clamping pieces are held radially displaceable.
  • the clamping pieces are preferably biased by the spring element in the radial direction towards the center against the positive locking elements.
  • the clamping pieces are held in recesses of the sleeve.
  • the clamping pieces on their side facing the tool on inclined surfaces, which cooperate with inclined surfaces on the sleeve such that a movement of the sleeve against the inclined surfaces of the clamping pieces causes an application of the clamping pieces towards the center.
  • the sleeve is biased by the spring element in the axial direction in the direction of the closed position.
  • an ejector in the form of an axially fixed to the drive spindle sleeve is provided on the drive spindle, which limits a movement of the clamping pieces in the axial direction of the tool.
  • the spring element should preferably be dimensioned such that the highest possible clamping force results, which is sufficient for all applications.
  • the spring element may be formed, for example, as a plate spring package. However, other spring shapes are conceivable.
  • FIG. 1 is an inventive power-driven hand tool shown cut in the region of its gear head and designated overall by the numeral 10.
  • the hand tool 10 has a drive shaft 12, at the outer end of a tool 62 is attached by means of a clamping device explained in more detail below.
  • the drive spindle 12 is driven in a manner not shown oscillating by a driven by an eccentric tuning fork 24. As indicated by the double arrow 15, the drive spindle 12 is thereby moved about its longitudinal axis 13, with a high frequency between about 10,000 and 25,000 oscillations per minute and a small pivot angle between about 0.5 and 7 °.
  • oscillating powered hand tools 10 have recently been used for a variety of tasks to perform numerous specialized tasks, including, but not limited to.
  • the drive shaft 12 is formed in two parts in this embodiment and has a spindle tube 18 which is bolted to a bearing pin 20 via a thread 22.
  • the drive spindle 12 is mounted at its upper end in the region of the bearing journal 20 by means of a bearing 14 and at its lower end in the region of the spindle tube 18 by means of a bearing 16.
  • a collet designated generally with 66 is provided, which engages positively in a mounting opening 64 of the tool 62.
  • the collet 66 is also positively connected to the spindle tube 18 and in the in FIG. 1 shown clamping position by a fastener 48 against the drive spindle 12 clamped so that the tool 62 is clamped by the collet 66 against a holding portion 19 at the outer end of the spindle tube 18.
  • the fastening element 48 has a clamping shank 49, which in the clamping position shown here in a sleeve 38 with clamping pieces 40 of a generally designated by the numeral 36 closure is positively fixed within the spindle tube 18.
  • the clamping force is applied by a spring element in the form of plate spring package 58, which is held within the spindle tube 18 between a locking washer 59 which engages in an annular groove 60 and the closure 36. Due to the tension of the disk spring assembly 58, the tool 62 between the holding portion 19 of the spindle tube 18 and the collet 66 is firmly clamped.
  • the shutter 36 between an in FIG. 1 illustrated clamping position and a release position by means of a displacement device 25 axially displaceable.
  • the closure 36 is held between the pressure piece 26 and the plate spring package 58 by the Federkraftbeetzschlagung.
  • the pressure piece 26 is in the clamping position positively in a correspondingly shaped recess of the journal 20 and protrudes with its cylindrical shaft through a central bore of the journal 20 down.
  • the displacement device 25 has an eccentric 30, which by means of a in FIG. 1 only with 28 indicated clamping lever about an eccentric axis 31 is pivotable.
  • the sleeve 38 of the closure 36 is annular and slidably received within the inner surface of the spindle tube 18.
  • the tool-side end face of the sleeve 38 serves to bear the cup spring assembly 58.
  • the inner surface of the sleeve 38 is formed as an inclined, cone-shaped inclined surface 46.
  • the sleeve 38 cooperates with three clamping pieces 40, which are held in correspondingly shaped recesses of the sleeve 38.
  • the clamping pieces 40 have on their side facing the tool 62 each have an inclined surface and can move due to the same inclination as the inclined surface 46 along the sleeve 38 axially and at the same time radially.
  • the clamping pieces 40 are each provided with a toothing 44 which cooperates with a correspondingly shaped toothed section 50 on the clamping shank 49 of the fastening element 48.
  • the clamping pieces 40 have on their side facing the pressure piece 26 each have an axial bore 41, within which a spring 42 is received, which may be formed as a helical spring and which serves a pressure of the clamping pieces 40 in the direction of the tool 62.
  • the sleeve 38 is bolted to the pressure piece 26 via screws, not shown.
  • the screws are screwed through correspondingly shaped holes of the pressure piece 26 into associated threaded holes in the sleeve 38.
  • This two-part construction serves to mount the clamping pieces 40 in associated recesses of the sleeve 38.
  • the structure of the closure 36 and the associated displacement device 25 is basically known and corresponds to that in the WO 2005/102605 known structure, which is fully incorporated herein by reference.
  • the spring element 58 is not designed as a helical spring, but as a plate spring assembly 58 and is supported on the tool side on the locking ring 59, while it abuts on the sleeve 38 on the opposite side.
  • An ejector 56 in the form of a sleeve is enclosed by the plate spring package 50 and is located at its tool-side end with a flange portion 57 on the locking ring 59 at.
  • the fastener 48 engages with a head portion 51 but not directly on the tool 62, but engages with a cone-shaped portion 53 in a correspondingly shaped recess 78 of the collet 66, so that the collet 66 through the Fastener 48 is clamped with a flange 76 directly against the tool 62 and thus against the holding portion 19.
  • the spindle tube 18 is provided in its outer region on its inner surface with a polygonal section 74 in the form of a twelve-edged.
  • the collet 66 has a hexagonal-shaped polygonal section 72, which adjoins the flange section 76 and engages positively in the polygonal section 74 of the spindle tube 18.
  • the collet 66 in the region of the polygonal section 72 tends to be slightly widened outwards and is so in the polygonal section 74 of the spindle tube 18th pressed so that any game that is necessary for inserting the collet 66 in the spindle tube 18 is completely eliminated.
  • the tool 62 is held with its fastening opening 64, which is formed hexagonal, at the same time form-fitting manner on the polygonal section 72 of the collet 66.
  • the collet 66 has a central cylindrical bore 67, with which it is held axially displaceable on the clamping shaft 49 with a released closure 36 by a certain amount.
  • the fastening element 48 and the collet 66 are connected, for example by an O-ring 68, which can be inserted by a certain amount in a recess 70 on the inner surface of the collet 66, captive to a common unit.
  • the clamping lever 28 is moved in the direction of the arrow 33.
  • the closure 36 is transferred by the pressure piece 26 in the release position, in which the pressure piece 26 in a opposite FIG. 1 is in the direction of the tool 62 shifted position.
  • the pressure piece 26 presses against the clamping pieces 40, so that they dodge 48 of the teeth 50 of the fastening element 48 radially outward, whereby the fastening element 48 is released and can be pulled together with the collet 66 from the spindle tube 18 ,
  • the common unit of fastener 48 and collet 66 can be reintroduced into the spindle tube 18 and then transferred again by moving the clamping lever 28 in the clamping position.
  • a spring element 54 is further included in the form of a wave ring. This spring element 54 facilitates release of the fastening element 48 after a previously performed clamping operation, so that the fastening element 48 can be easily pulled out in the release position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Clamps And Clips (AREA)
EP08012511A 2007-07-19 2008-07-10 Outil manuel à moteur Active EP2017036B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007035045A DE102007035045A1 (de) 2007-07-19 2007-07-19 Kraftgetriebenes Handwerkzeug

Publications (2)

Publication Number Publication Date
EP2017036A1 true EP2017036A1 (fr) 2009-01-21
EP2017036B1 EP2017036B1 (fr) 2010-05-12

Family

ID=39764988

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08012511A Active EP2017036B1 (fr) 2007-07-19 2008-07-10 Outil manuel à moteur

Country Status (5)

Country Link
US (1) US8187058B2 (fr)
EP (1) EP2017036B1 (fr)
JP (1) JP5325486B2 (fr)
CN (1) CN101347936B (fr)
DE (2) DE102007035045A1 (fr)

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USD619152S1 (en) 2009-12-18 2010-07-06 Techtronic Power Tools Technology Limited Adapter
USD623034S1 (en) 2009-12-18 2010-09-07 Techtronic Power Tools Technology Limited Tool arbor
USD646542S1 (en) 2010-09-29 2011-10-11 Milwaukee Electric Tool Corporation Accessory interface for a tool
USD651062S1 (en) 2010-09-29 2011-12-27 Milwaukee Electric Tool Corporation Tool interface for an accessory
USD653523S1 (en) 2010-09-29 2012-02-07 Milwaukee Electric Tool Corporation Adapter for a tool
ITTO20100898A1 (it) * 2010-11-10 2012-05-11 Pietro Liga Mandrino per un disco abrasivo
DE102012007926A1 (de) 2012-04-17 2013-10-17 C. & E. Fein Gmbh Handwerkzeug mit einer Spannvorrichtung für ein Werkzeug
DE102012007927A1 (de) 2012-04-17 2013-10-17 C. & E. Fein Gmbh Handwerkzeug mit einer Spannvorrichtung
CN103963025A (zh) * 2013-02-05 2014-08-06 苏州宝时得电动工具有限公司 动力工具
US10137592B2 (en) 2013-05-06 2018-11-27 Milwaukee Electric Tool Corporation Oscillating multi-tool system
CN112518505A (zh) * 2020-11-30 2021-03-19 华东至正工业自动化(常熟)有限公司 一种基于6sps并联机构的浮动打磨主轴
WO2021130026A1 (fr) * 2019-12-23 2021-07-01 Robert Bosch Gmbh Dispositif de serrage rapide

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DE102006021969A1 (de) * 2006-05-04 2007-11-08 C. & E. Fein Gmbh Oszillationsantrieb
DE202009001440U1 (de) * 2009-01-30 2010-07-01 C. & E. Fein Gmbh Kraftgetriebenes Handwerkzeug mit Spanneinrichtung für ein Werkzeug
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
US9186770B2 (en) 2010-04-29 2015-11-17 Black & Decker Inc. Oscillating tool attachment feature
CN102416615B (zh) * 2010-09-26 2014-07-30 南京德朔实业有限公司 具有工作元件快速夹紧装置的手持动力工具
CN102441876B (zh) * 2010-10-09 2014-10-15 南京德朔实业有限公司 具有工作元件夹紧装置的动力工具
US9149923B2 (en) 2010-11-09 2015-10-06 Black & Decker Inc. Oscillating tools and accessories
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USD651876S1 (en) 2010-12-14 2012-01-10 Techtronic Power Tools Technology Limited Universal interface for accessory blades
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US9486934B2 (en) * 2012-11-23 2016-11-08 Chervon (Hk) Limited Accessory clamping mechanism and power tool having the same
US9339927B2 (en) * 2012-12-29 2016-05-17 Chervon (Hk) Limited Accessory clamping mechanism and power tool having the same
CN103170956B (zh) * 2012-12-29 2015-12-02 南京德朔实业有限公司 附件夹紧机构及带有该附件夹紧机构的动力工具
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ITTO20100898A1 (it) * 2010-11-10 2012-05-11 Pietro Liga Mandrino per un disco abrasivo
WO2013156306A1 (fr) 2012-04-17 2013-10-24 C. & E. Fein Gmbh Outil manuel comprenant un dispositif de serrage pour un outil
DE102012007927A1 (de) 2012-04-17 2013-10-17 C. & E. Fein Gmbh Handwerkzeug mit einer Spannvorrichtung
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CN103963025A (zh) * 2013-02-05 2014-08-06 苏州宝时得电动工具有限公司 动力工具
CN103963025B (zh) * 2013-02-05 2016-02-17 苏州宝时得电动工具有限公司 动力工具
US10137592B2 (en) 2013-05-06 2018-11-27 Milwaukee Electric Tool Corporation Oscillating multi-tool system
US10940605B2 (en) 2013-05-06 2021-03-09 Milwaukee Electric Tool Corporation Oscillating multi-tool system
US11724413B2 (en) 2013-05-06 2023-08-15 Milwaukee Electric Tool Corporation Oscillating multi-tool system
WO2021130026A1 (fr) * 2019-12-23 2021-07-01 Robert Bosch Gmbh Dispositif de serrage rapide
CN112518505A (zh) * 2020-11-30 2021-03-19 华东至正工业自动化(常熟)有限公司 一种基于6sps并联机构的浮动打磨主轴

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US8187058B2 (en) 2012-05-29
CN101347936B (zh) 2012-03-21
CN101347936A (zh) 2009-01-21
US20090023371A1 (en) 2009-01-22
JP2009023083A (ja) 2009-02-05
DE102007035045A1 (de) 2009-01-29
EP2017036B1 (fr) 2010-05-12
DE502008000638D1 (de) 2010-06-24
JP5325486B2 (ja) 2013-10-23

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